Device for measuring photoinduced isomerization molecular capacitance
By setting a light-transmitting area and a through hole at the bottom of the capacitor cell, combined with a threaded connection for fixing the light source, the problem of the inability to introduce a light source in existing devices is solved, enabling accurate measurement of the photo-induced isomerization molecular capacitance and providing a tool for studying photoresponse characteristics.
Patent Information
- Application Number
- CN202522562552.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-12-02
AI Technical Summary
Existing capacitance testing devices cannot introduce external light sources while maintaining airtightness and constant temperature, which affects the accuracy and repeatability of photoisomerization molecular capacitance measurements.
A light-transmitting area and a through hole are provided at the bottom of the capacitor cell, allowing an external light source to irradiate the sample solution through the bottom of the capacitor cell, while maintaining the airtightness and temperature control of the device. The light source can be detached and fixed by a threaded connection.
Accurate measurement of the capacitance of photoisomerized molecules was achieved under conditions of maintaining device airtightness and constant temperature, providing a reliable tool for studying the dynamic dipole moment and photoresponse characteristics of photoisomerized molecules.
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Figure CN223742380U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of devices for determining photoisomerization molecule capacitance, which can be applied to the determination of photoisomerization molecule capacitance. BACKGROUND
[0002] Photoisomerization molecules will change their molecular configuration under light, which leads to the change of their dipole moment. This change can be indirectly reflected by measuring the change of the capacitance of the solution in which the molecules are located. Therefore, accurately measuring the change of the capacitance of the sample solution containing such molecules before and after light is crucial for studying the isomerization mechanism, kinetic process of such molecules and the light response characteristics of related materials.
[0003] Existing capacitance testing devices usually include a main structure with a recess for accommodating a sample solution-containing capacitor cell, and a cover with a measurement probe and connected to external leads for sealing the recess and conducting capacitance measurement. To meet the requirements of precise experiments, some capacitance testing devices are also provided with a constant-temperature chamber to maintain the temperature of the sample solution constant by external circulation of water. However, the existing capacitance testing devices have a significant defect: the main structure and the capacitor cell are usually made of metal (such as aluminum alloy) or high polymer material (such as polytetrafluoroethylene), which are all light-proof materials. When photoisomerization molecules need to be studied, it is impossible to introduce an excitation light source into the sealed capacitor cell environment. If the airtightness or constant-temperature function of the device is sacrificed to introduce the light source, the accuracy and repeatability of the measurement will be seriously affected.
[0004] Therefore, there is an urgent need in the art for an improved capacitance measuring device that can allow external light source to irradiate the sample solution while maintaining good airtightness and optional constant-temperature function, so as to achieve accurate and reliable measurement of the capacitance of photoisomerization molecules.
[0005] It should be noted that the information disclosed in the above background section is only for understanding the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY
[0006] To overcome the defects of the prior art, the utility model provides a kind of devices for determining photoisomerization molecule capacitance, solve the technical problems of photoisomerization molecule capacitance and dipole moment determination.
[0007] The technical scheme adopted by the utility model comprises:
[0008] The device for measuring the capacitance of photoisomerization molecules comprises a main structure, a capacitor cell, and a cover with a probe and external connecting wires, wherein a recess is arranged in the main structure, the capacitor cell is arranged in the recess, the capacitor cell is used for containing a sample solution containing photoisomerization molecules to be measured, and the cover with the probe and the external connecting wires is used for sealing the recess and measuring the capacitance of the sample solution; a through hole is arranged at the bottom of the recess, the bottom of the capacitor cell has a light-transmitting area, the through hole is located corresponding to the light-transmitting area, and the through hole is used for allowing light of an external light source to transmit through the light-transmitting area and irradiate the sample solution in the capacitor cell.
[0009] Preferably, the device further comprises a light source accommodating structure which is located below the recess and detachably connected to the bottom of the main structure, and is used for accommodating and fixing an external light source, so that the light of the light source transmits through the light-transmitting area at the bottom of the capacitor cell and irradiates the sample solution in the capacitor cell.
[0010] Preferably, the bottom of the main structure further has a light-transmitting sealing layer arranged below the through hole, the main structure further has a constant-temperature cavity which surrounds the recess, and the main structure further has a circulating water inlet and a circulating water outlet which are arranged on the main structure and communicate with the constant-temperature cavity, and are used for connecting external circulating water; the light of the light source in the light source accommodating structure transmits through the light-transmitting sealing layer and the light-transmitting area at the bottom of the capacitor cell and irradiates the sample solution in the capacitor cell.
[0011] Preferably, the bottom of the capacitor cell is provided with an external thread, and the through hole is provided with an internal thread matched with the external thread, and the capacitor cell is detachably fixed in the recess by screwing the external thread and the internal thread.
[0012] Preferably, the main structure and the light source accommodating structure are detachably connected together through a threaded structure.
[0013] Preferably, the light source accommodating structure is a hollow cylinder, the hollow area of the hollow cylinder is aligned with the through hole at the bottom of the recess, and the hollow area is used for accommodating and fixing an external light source.
[0014] Preferably, the size of the through hole is smaller than the size of the bottom surface of the recess, and the size of the through hole is smaller than the size of the light-transmitting area at the bottom of the capacitor cell, so that the light-transmitting area completely covers the through hole.
[0015] Preferably, the size of the hollow area of the hollow cylinder is smaller than the size of the light-transmitting area at the bottom of the capacitor cell.
[0016] Preferably, the light-transmitting region of the bottom of the capacitor cell is made of a light-transmitting material, which is glass or polymethyl methacrylate, and the light-transmitting region is polished.
[0017] Preferably, the material of the light-transmitting sealing layer is glass or polymethyl methacrylate.
[0018] The beneficial effects of the present application include:
[0019] The device for measuring the photoisomerization molecular capacitance of the present application is provided with a through hole at the bottom of the groove accommodating the capacitor cell, and a light-transmitting region at the position of the through hole at the bottom of the capacitor cell. The through hole provides a light path channel for the external light source to enter the interior of the capacitor cell. The light-transmitting region at the bottom of the capacitor cell allows the light to penetrate and irradiate the sample solution while ensuring the airtightness of the capacitor cell. The cooperation of the through hole at the bottom of the groove and the light-transmitting region at the bottom of the capacitor cell enables the light stimulation to be applied to the sample solution without damaging the airtight structure of the device main body, so that the solution capacitance change caused by the molecular isomerization before and after the light irradiation can be accurately captured, thereby providing a reliable and convenient tool for studying the dynamic dipole moment, transition mechanism and light response characteristics of the photoisomerization molecule. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 The cross-sectional view of the device for measuring the photoisomerization molecular capacitance in Example 1.
[0021] Figure 2 The top view of the device for measuring the photoisomerization molecular capacitance in Example 1.
[0022] Figure 3 The overall schematic diagram of the device for measuring the photoisomerization molecular capacitance in Example 2.
[0023] Figure 4 The top view of the capacitor cell in Example 2.
[0024] Figure 5 The side view of the capacitor cell in Example 2.
[0025] Figure 6 The top view of the external circulating water main body structure in Example 2.
[0026] Figure 7 The cross-sectional view of the external circulating water main body structure in Example 2.
[0027] 1-main body structure, 2-capacitor cell, 21-light-transmitting region, 3-lid, 4-external thread, 5-through hole, 6-groove, 7-light source accommodating structure, 71-hollow region, 8-circulating water inlet, 9-circulating water outlet, 10-internal thread, 11-light-transmitting sealing layer, 12-constant temperature chamber. DETAILED DESCRIPTION
[0028] The embodiments of the present application will be described in detail below. It should be emphasized that the following description is only exemplary and is not intended to limit the scope of the present application and its applications, and the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing, coupling and / or communicating.
[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0031] The device for measuring the capacitance of photoisomerization molecules provided by the embodiment of the present application comprises a main body structure, a capacitor cell, and a cover with a probe and external connecting wires, a recess is arranged in the main body structure, the capacitor cell is accommodated in the recess, the capacitor cell is used for accommodating a sample solution containing photoisomerization molecules to be measured, the cover with the probe and the external connecting wires is used for sealing the recess and measuring the capacitance of the sample solution; a through hole is arranged at the bottom of the recess, the bottom of the capacitor cell has a light-transmitting area, the position of the through hole corresponds to the light-transmitting area, and the through hole is used for allowing the light of an external light source to transmit through the light-transmitting area and irradiate the sample solution in the capacitor cell.
[0032] The through hole provides a light path channel for the external light source to enter the inside of the capacitor cell, the external light source used can be selected according to the photoisomerization wavelength of the photoisomerization molecules in the sample solution studied, the light-transmitting area at the bottom of the capacitor cell allows the light to penetrate and irradiate the sample solution while ensuring the airtightness of the capacitor cell, and the through hole at the bottom of the recess cooperates with the light-transmitting area at the bottom of the capacitor cell, so that the light of the external light source can accurately irradiate the sample solution, thereby realizing accurate and reliable measurement of the capacitance of the photoisomerization molecules.
[0033] In some embodiments, the device further comprises a light source accommodating structure, which is located below the recess and detachably connected to the bottom of the main body structure, and is used to accommodate and fix an external light source, so that the light of the light source irradiates the sample solution in the capacitor cell through the light-transmitting region of the bottom of the capacitor cell. By detachably arranging the light source accommodating structure on the bottom of the main body structure, the external light source can be specially used for installation and fixation, so that the external light source is integrated into the device for measuring the capacitance of the photoisomerization molecule, and the use of the device is facilitated.
[0034] In some embodiments, the bottom of the main body structure further has a light-transmitting sealing layer arranged below the through hole, and the main body structure further has a constant-temperature cavity arranged around the recess, and the main body structure is further provided with a circulating water inlet and a circulating water outlet communicating with the constant-temperature cavity, and the circulating water inlet and the circulating water outlet are used to externally connect circulating water; the light of the light source in the light source accommodating structure irradiates the sample solution in the capacitor cell through the light-transmitting sealing layer and the light-transmitting region of the bottom of the capacitor cell. When the circulating water is externally connected to the main body structure to perform the heat preservation function of the capacitor cell, the light-transmitting sealing layer arranged below the through hole on the bottom of the main body structure is arranged to isolate the main body structure from the lower light source accommodating structure, so that the modular integration and separation of the constant-temperature function and the light irradiation function are realized, the processing and assembly are facilitated, and the universality and maintainability of the device are improved.
[0035] In some embodiments, the bottom of the capacitor cell is provided with an external thread, and the through hole is provided with an internal thread matched with the external thread, and the capacitor cell is detachably fixed in the recess through screwing. Through the threaded connection between the bottom of the capacitor cell and the recess, reliable fixation and sealing of the capacitor cell are realized, and meanwhile, the capacitor cell is convenient to disassemble, clean and replace, so as to adapt to the needs of different experimental samples, and meanwhile, when the circulating water flows through the constant-temperature cavity, the flow of the water will not cause the capacitor cell to move, so as to ensure the accuracy of the capacitance measurement.
[0036] In some embodiments, the main body structure and the light source accommodating structure are detachably connected through a threaded structure. The threaded connection between the main body structure and the light source accommodating structure facilitates the installation, debugging and replacement of the light source, and also facilitates the cleaning and maintenance of the main body structure.
[0037] In some embodiments, the light source accommodating structure is a hollow cylinder, and the hollow region of the hollow cylinder is aligned with the through hole at the bottom of the recess, and is used to accommodate and fix an external light source. The design of the hollow cylinder can adapt to light sources of various shapes and sizes, and provide stable support and positioning, so as to ensure the alignment of the light path.
[0038] In some embodiments, the size of the through hole is smaller than the size of the bottom surface of the groove, and the size of the through hole is smaller than the size of the light transmission region of the bottom of the capacitor cell, so that the light transmission region completely covers the through hole.
[0039] In some embodiments, the size of the hollow region of the hollow cylinder is smaller than the size of the light transmission region of the bottom of the capacitor cell.
[0040] By limiting the size relationship of the through hole, the hollow region and the light transmission region, the effective passing of the light path and the effective covering of the sealing surface are ensured, and the light path is prevented from being blocked.
[0041] The manufacturing material of the capacitor cell should not react with the sample solution to be measured. In some embodiments, the light transmission region of the bottom of the capacitor cell is made of a light transmission material, and the light transmission region is polished. The light transmission material is glass or polymethyl methacrylate. The part (such as the side surface) of the capacitor cell except the light transmission region can adopt the same material as the main structure. After polishing the light transmission region, better light transmission effect can be achieved, and the loss and scattering of light in the transmission process are minimized, so that the light intensity and the light energy acting on the sample are ensured.
[0042] In some embodiments, the material of the light transmission sealing layer is glass or polymethyl methacrylate.
[0043] The specific embodiments of the utility model are further described below.
[0044] Embodiment 1
[0045] As shown in Figures 1-2 A device for measuring the capacitance of a photoisomerization molecule includes a main structure 1, a capacitor cell 2, a cover with a probe and connected with an external lead 3, and a light source accommodating structure 7. The main structure 1 is provided with a groove 6, and the capacitor cell 2 is accommodated in the groove 6. The capacitor cell 2 is used to accommodate a sample solution containing a photoisomerization molecule to be measured. The cover with a probe and connected with an external lead 3 is used to compress and seal the groove 6 and measure the capacitance of the sample solution. The bottom of the groove 6 is provided with a through hole 5, the bottom of the capacitor cell 2 has a light transmission region 21, the position of the through hole 5 corresponds to the light transmission region 21, and the through hole 5 is used to make the light of an external light source transmit through the light transmission region 21 and irradiate the sample solution in the capacitor cell 2. The light source accommodating structure 7 is located below the groove 6 and is detachably connected with the bottom of the main structure 1 through a threaded structure. The light source accommodating structure 7 is used to accommodate and fix an external light source, so that the light of the light source transmits through the light transmission region 21 of the bottom of the capacitor cell and irradiates the sample solution in the capacitor cell 2.
[0046] In this example, the light source accommodating structure 7 is a hollow cylinder, the hollow area 71 of the hollow cylinder is aligned with the through hole 5 of the groove bottom, and the hollow area is used to accommodate and fix the additional light source. The bottom of the capacitor cell 2 is made of glass and is polished, and the entire bottom surface is a light transmission area. The side of the capacitor cell 2 is made of the same material as the main body structure, and the side and the bottom are pressed together to prevent leakage of the sample solution. The size of the through hole 5 is smaller than the size of the bottom surface of the groove 6, and the size of the through hole 5 is smaller than the size of the light transmission area 21 of the bottom of the capacitor cell, so that the light transmission area 21 completely covers the through hole 5. The size of the hollow area 71 of the hollow cylinder is smaller than the size of the light transmission area 21 of the bottom of the capacitor cell.
[0047] This embodiment is suitable for experiments with low temperature requirements, and the working process is as follows:
[0048] 1. Put the capacitor cell into the groove, cover the cap after adding the sample solution, press tightly, and connect the external lead.
[0049] 2. Install the selected light source in the hollow area 71 of the light source accommodating structure 7.
[0050] 3. Do not turn on the light source first, wait for the capacitor to stabilize, and record the initial capacitance value.
[0051] 4. Turn on the light source, the light passes through the through hole and the light transmission area of the bottom of the capacitor to irradiate the sample solution, wait for the capacitor to stabilize again, and record the capacitance value after illumination.
[0052] 5. Compare the capacitance value change before and after illumination, and analyze the photoisomerization behavior.
[0053] Example 2
[0054] As shown in Figures 3-7 , the difference between example 1 and example 2 is that the main body structure 1 of example 2 is connected with circulating water, specifically, the bottom of the main body structure 1 also has a light transmission sealing layer 11 arranged below the through hole 5, the material of the light transmission sealing layer 11 is glass, the main body structure 1 also has a constant temperature chamber 12, the constant temperature chamber 12 surrounds the groove 6 (i.e. surrounds the bottom and side of the groove 6), the main body structure 1 also has a circulating water inlet 8 and a circulating water outlet 9 connected with the constant temperature chamber 12, the circulating water inlet 8 and the circulating water outlet 9 are used to connect with circulating water, in this example, the circulating water inlet 8 and the circulating water outlet 9 are symmetrically arranged on both sides of the main body structure 1; the light of the light source in the light source accommodating structure 7 transmits through the light transmission sealing layer 11 and the light transmission area 21 of the bottom of the capacitor cell to irradiate the sample solution in the capacitor cell 2.
[0055] The bottom of the capacitor cell 2 is provided with external threads 4, and the through hole 5 is provided with internal threads 10 matching the external threads, so that the capacitor cell 2 is detachably fixed in the groove 6 by screwing.
[0056] The embodiment is suitable for experiments with high temperature requirements, and the working process is as follows:
[0057] 1. Put the capacitor cell into the groove, cover the cover after adding the sample solution, and connect the external lead.
[0058] 2. Install the selected light source in the hollow area 71 of the light source containing structure 7.
[0059] 3. Connect the external circulating water system to the circulating water through the circulating water inlet and outlet.
[0060] 4. Do not turn on the light source first, wait for the capacitor to stabilize, and record the initial capacitance value.
[0061] 5. Turn on the light source, and the light passes through the light-transmitting sealing layer, the through hole and the light-transmitting area at the bottom of the capacitor cell to irradiate the sample solution, and wait for the capacitor to stabilize again. Record the capacitance value after light irradiation.
[0062] 6. Compare the capacitance value change before and after light irradiation, and analyze the photoisomerization behavior.
[0063] The above is a further detailed description of the utility model in combination with specific / preferred embodiments, and cannot be considered as limiting the specific implementation of the utility model to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can make a number of substitutions or modifications to the described embodiments, and these substitutions or modifications should be considered as belonging to the protection scope of the utility model. In the description of the specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the case of not contradicting each other, the skilled person in the art can combine and combine the different embodiments or examples described in the specification and the characteristics of the different embodiments or examples. Although the embodiments of the utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made in this paper without departing from the protection scope of the patent application.
Claims
1. A device for measuring the capacitance of a photoisomerization molecule, comprising a main body structure, a capacitor cell, a cover with a probe and an external lead, wherein a recess is arranged in the main body structure, the capacitor cell is accommodated in the recess, the capacitor cell is used to accommodate a sample solution containing the photoisomerization molecule to be measured, and the cover with the probe and the external lead is used to seal the recess and measure the capacitance of the sample solution; characterized in that: The bottom of the recess is provided with a through hole, the bottom of the capacitor cell has a light transmission area, the through hole is positioned corresponding to the light transmission area, and the through hole is used for allowing light of an external light source to transmit through the light transmission area to irradiate the sample solution in the capacitor cell. 2. The device for determining the photoisomerization molecule capacitance according to claim 1, wherein: The device further comprises a light source accommodating structure which is located below the recess and detachably connected to the bottom of the main body structure, and is used for accommodating and fixing an external light source, so that light of the light source transmits through the light transmission area of the bottom of the capacitor cell to irradiate the sample solution in the capacitor cell.
3. The device for determining the photoisomerization molecule capacitance according to claim 2, wherein: The bottom of the main body structure is further provided with a light transmission sealing layer which is arranged below the through hole, and the main body structure is further provided with a constant temperature cavity which surrounds the recess, and a circulating water inlet and a circulating water outlet which are arranged on the main body structure and communicate with the constant temperature cavity, and are used for connecting external circulating water; light of the light source in the light source accommodating structure transmits through the light transmission sealing layer and the light transmission area of the bottom of the capacitor cell to irradiate the sample solution in the capacitor cell.
4. The device for determining the capacity of a photoisomerizable molecule according to claim 3, characterized in that: The bottom of the capacitor cell is provided with an external thread, and the through hole is provided with an internal thread which matches the external thread, so that the capacitor cell is detachably fixed in the recess by screwing.
5. The device for determining the photoisomerization molecule capacitance according to claim 2, wherein: The main body structure and the light source accommodating structure are detachably connected together through a threaded structure.
6. The device for determining the photoisomerization molecule capacitance according to claim 2, wherein: The light source accommodating structure is a hollow cylinder, the hollow area of the hollow cylinder is aligned with the through hole at the bottom of the recess, and the hollow area is used for accommodating and fixing an external light source.
7. The device for determining the photoisomerization molecule capacitance according to claim 1, wherein: The size of the through hole is smaller than the size of the bottom surface of the recess, and the size of the through hole is smaller than the size of the light transmission area of the bottom of the capacitor cell, so that the light transmission area completely covers the through hole.
8. The device for determining the photoisomerization molecule capacitance according to claim 6, wherein: The size of the hollow area of the hollow cylinder is smaller than the size of the light transmission area of the bottom of the capacitor cell.
9. The device for determining the photoisomerization molecule capacitance according to claim 1, wherein: The light transmission area of the bottom of the capacitor cell is made of a light transmission material, the light transmission area is polished, and the light transmission material is glass or polymethyl methacrylate.
10. The device for determining the photoisomerization molecule capacitance according to claim 3, wherein: The material of the light transmission sealing layer is glass or polymethyl methacrylate.