Application of UiO-66 coated with rhodamine 6G in fluorescence detection of ferric ions

A fluorescence detection, uio-66 technology, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of small linear range and poor applicability between fluorescence intensity and iron ion concentration, and achieve good selectivity, easy storage and stability good sex effect

Inactive Publication Date: 2019-03-19
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0008] CN 108593616A discloses a UiO-66-NH for fluorescence detection of iron ions 2 The preparation method, iron ion on UiO-66-NH 2 The fluorescence has obvious quenching effect, but the UiO-66-NH 2 As a fluorescent probe, the above-mentioned traditional fluorescent probes based on a single fluorescent signal are easily affected by factors such as the concentration of the detection substrate, the external environment and instrument conditions, and the linear range between the fluorescence intensity and the concentration of iron ions is very small, which limits the applicability. poor

Method used

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  • Application of UiO-66 coated with rhodamine 6G in fluorescence detection of ferric ions
  • Application of UiO-66 coated with rhodamine 6G in fluorescence detection of ferric ions
  • Application of UiO-66 coated with rhodamine 6G in fluorescence detection of ferric ions

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Experimental program
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Effect test

Embodiment 1

[0031] 1. Synthesis of UiO-66

[0032] ①Take a 50mL beaker, pipette 14mL of DMF into the beaker, then pipette 2.5mL of glacial acetic acid into the beaker, then add 5mM zirconium chloride into the beaker, and sonicate until the zirconium chloride dissolves.

[0033] ②Take a 10mL beaker, pipette 4mL of DMF into the beaker, then add 5mM terephthalic acid, and sonicate until dissolved.

[0034] ③Transfer the solution in step ② into the beaker of step ①, stir for 5 minutes, then transfer to a 50mL polytetrafluoroethylene autoclave, heat up the oven at 20°C per hour, keep it at 120°C for 36h, and then directly cool down , centrifuged at 12,000rpm for 3 minutes, washed the solid powder with DMF 3 times, soaked overnight, then centrifuged the powder, washed 3 times with methanol, soaked overnight, collected the powder by centrifugation, and dried overnight in vacuum at room temperature to obtain a white The powder is UiO-66.

[0035] 2. Synthesis of R6G@UiO-66

[0036] UiO-66 (15m...

Embodiment 2

[0038] Embodiment 2 ratiometric fluorescence method detects Fe 3+

[0039] (1) Add R6G@UiO-66 to distilled water to prepare a 50mg / L fluorescent probe solution.

[0040] (2) Sample solution: configure a series of different concentration levels (10 -7 M, 10 -6 M, 10 -5 M, 10 -4 M, 10 -3 M, 10 -2 M) Fe 3+ The standard solution and other metal cation solutions with a concentration of 300 μM are ready for use.

[0041] (3) Get 2mL of the fluorescent probe solution of step (1) in a four-sided light-transmitting quartz cuvette, then add the sample solution of step (2), detect the fluorescence intensity with a fluorescence spectrometer, and set the slit width of the fluorescence spectrometer 10nm, set the excitation light wavelength to 365nm, and detect the emission peak fluorescence intensity at the wavelengths of 422nm (corresponding to the fluorescence of UiO-66) and 550nm (corresponding to the fluorescence of R6G).

[0042] The results showed that the addition of Fe 3+ ...

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Abstract

The invention discloses an application of UiO-66 coated with rhodamine 6G in fluorescence detection of ferric ions. The UiO-66 coated with rhodamine 6G is a rate type fluorescent probe for fluorescence detection of ferric ions, wherein fluorescence of UiO-66 is taken as a reference signal, and fluorescence of rhodamine 6G is taken as a responding signal. Compared with existing fluorescence detection of ferric ions, the UiO-66 coated with rhodamine 6G taken as the fluorescent probe is easy to store, very good in stability and good in selectivity to Fe<3+>, and can recognize and detect the Fe<3+> specifically. The application is simple and convenient to operate and high in sensitivity, and also can avoid errors caused by concentration of the fluorescent probe and the environment effectively.

Description

technical field [0001] The invention relates to UiO-66 coated with rhodamine 6G in the fluorescence detection of Fe 3+ in the application. Background technique [0002] Ferric ions play an important role in the human body and the ecological environment. Abnormal content of Fe 3+ Can lead to physical disorders such as Fe deficiency 3+ Can cause anemia and decline in physical function; excessive intake of Fe 3+ Can cause damage to the liver and kidneys. So far, people have developed a variety of detection Fe 3+ methods, such as flame atomic absorption spectrometry, graphite furnace atomic absorption spectrometry, and inductively coupled plasma spectrometry. However, these methods are time consuming, complex and require expensive instruments. Therefore, to establish a fast and simple detection Fe 3+ method is very necessary. [0003] Metal-organic frameworks (MOFs) are a class of materials with tunable pore sizes formed by self-assembly of organic ligands and metal cen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/64
Inventor 卢小泉李金芳魏丽萍王铁英张银潘胥亚丽吴艳霞孙和水陕多亮陈晶韩振刚
Owner NORTHWEST NORMAL UNIVERSITY
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