Novel thermochromic fluorescent thermometer material and preparation method thereof

A thermochromic and thermometer technology, applied in the field of nanomaterials, can solve problems such as the scarcity of dual emission materials and the difficulty of thermal activity energy barriers, and achieve the effects of high sensitivity, simple preparation method, and good stability

Inactive Publication Date: 2014-12-24
ZHENGZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, reports of dual-emission materials are scarce, mainly because it is very difficult to overcome the thermally active energy barrier between diffe

Method used

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  • Novel thermochromic fluorescent thermometer material and preparation method thereof
  • Novel thermochromic fluorescent thermometer material and preparation method thereof
  • Novel thermochromic fluorescent thermometer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: synthetic thermochromic fluorescent thermometer material

[0016] Dissolve 17.4 mg of 2-naphthylmethylmercaptan (0.1 mmol) in a mixed solution of 3 mL of acetonitrile and 3 mL of acetone, and stir until completely dissolved. Add 44.2 mg (0.2 mmol) of silver trifluoroacetate to the above solution, and continue stirring until the solution is clear. After the reaction is finished, the solution is evaporated at room temperature in the dark to obtain crystals, which are then filtered to obtain a thermochromic fluorescent thermometer material.

Embodiment 2

[0017] Embodiment 2: Thermochromic phenomenon of thermochromic fluorescent thermometer material

[0018] Take the thermochromic fluorescent thermometer material sample prepared in Example 1, and it emits red light at room temperature under the irradiation of an ultraviolet lamp. When the sample is soaked in liquid nitrogen, it emits yellow light under the same UV lamp. When the sample temperature gradually increased to room temperature, its red color returned. The color change recognized by the naked eye can be applied to temperature sensing.

Embodiment 3

[0019] Embodiment 3: the measurement of fluorescence of thermochromic fluorescence thermometer material

[0020] Take the thermochromic fluorescent thermometer material sample prepared in Example 1 and test its solid-state emission spectrum in the range of 193-298K, and there are two emission peaks in the emission spectrum: a high-energy peak and a low-energy peak. The emission intensity of the high-energy peak decreases with the increase of temperature, and the emission intensity of the low-energy peak increases with the increase of temperature, and the ratio of the intensity of the high-energy peak to the low-energy peak has a linear relationship with temperature. Its good stability can be applied to temperature detection.

[0021] Get the thermochromic fluorescence thermometer material that embodiment 1 makes and do further characterization, its process is as follows:

[0022] (1) Determination of crystal structure

[0023] The X-ray single crystal diffraction data of the...

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Abstract

The invention discloses a novel thermochromic fluorescent thermometer material and a preparation method thereof and belongs to the technical field of nanometer materials. A dual-emitting thermochromic and temperature-sensitive controllable silver nanocluster compound is obtained through a relatively mild self-assembly method. The formula of the silver nanocluster compound is Ag12(SCH2C10H7)6(CF3CO2)6(CH3CN )6 belonging to a trigonal system, and the space group is R-3, a=23.9571(6) Angstrom, b=23. 9571(6) Angstrom, c=16.5415(8) Angstrom, alpha=90 DEG, beta=90 DEG, gamma= 120 DEG, and V=8221.9(5) Angstrom (3). The light emitting color is changed from red to yellow as the temperature decreases and the fluorescence intensity ratio of high energy peak with low energy peak in the range of 193-298K is in linear relation with the temperature. The nanometer material is high in sensitivity and has good application prospects in the field of nanometer fluorescent thermometers.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a novel thermochromic fluorescent thermometer material and a preparation method thereof. Background technique [0002] Dual-emission materials are generally constructed of multiple chromophores or fluorescent spheres, which include organic dye molecules, quantum dot clusters, etc., and electrons or energy transfer are often accompanied by different chromophores. However, reports of dual-emission materials are scarce, mainly because it is very difficult to overcome the thermal activity barrier between different chromospheres. Besides, the Kasha rule only allows the lowest excited state to show emission thus restricting the existence of dual-emitting materials. [0003] Materials that respond thermochromically to temperature changes have become a research hotspot for scientists due to the visual signal readout and non-contact measurement. Remarkably, dual-emission m...

Claims

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Application Information

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IPC IPC(8): C09K9/02C07F1/10G01K11/32
Inventor 臧双全董喜燕徐庆庆
Owner ZHENGZHOU UNIV
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