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Phosphorescence chemical sensor and application thereof

A photochemical sensor and chemical sensor technology, applied in phosphorescent chemical sensors and their application fields, can solve the problems of interference, low sensitivity, complex synthesis, etc., and achieve the effects of good solubility and high detection sensitivity

Inactive Publication Date: 2010-07-14
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, pure organic compounds are used as transition metal and heavy metal fluorescence detection probes, especially macrocyclic compounds containing crown ethers have attracted much attention, but these organic compounds are generally more complex to synthesize, and generally the fluorescence lifetime of pure organic compounds is short , the Stokes shift is small, it is easily disturbed by the background, and the sensitivity is not high

Method used

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  • Phosphorescence chemical sensor and application thereof
  • Phosphorescence chemical sensor and application thereof
  • Phosphorescence chemical sensor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Iridium complex (ppy) 2 The synthetic method of Ir(ddc) is as figure 1 Shown:

[0030] At 4°C, carbon disulfide (3.1 mL, 0.052 mol) and 50 wt% aqueous sodium hydroxide solution (4 mL) were slowly added to an ethanol solution of dibenzylamine (9.9 g, 0.05 mol). After stirring for 5 hours, cooling and removal of volatiles, and then recrystallization from ethanol gave sodium dibenzyldithiocarbamate.

[0031] Weigh IrCl 3 ·3H 2 O (0.2g, 0.567mmol) and 2-phenylpyridine (0.22g, 1.42mmol) were added to the double-necked flask, vacuum-filled with nitrogen-vacuumized on the double-row tube, cycled three times, and finally protected the reaction with nitrogen system. After injecting 15 mL of a mixture of 2-ethoxyethanol and water (3:1, v / v) with a syringe, the reaction mixture was heated to 100° C., and the reaction was stirred for about 20 hours. After the reaction was stopped, the reaction mixture was cooled to room temperature, and a precipitate was obtained by filtratio...

Embodiment 2

[0033] Embodiment 2 iridium complex (ppy) 2 Preparation of Ir(ssc)

[0034] Weigh IrCl 3 ·3H 2 O (0.2g, 0.567mmol) and 2-phenylpyridine (0.22g, 1.42mmol) were added to the double-necked flask, vacuum-filled with nitrogen-vacuumized on the double-row tube, cycled three times, and finally protected the reaction with nitrogen system. After injecting 15 ml of a mixture of 2-ethoxyethanol and water (3:1, v / v) with a syringe, the reaction mixture was heated to 100° C. and stirred for about 20 hours. After the reaction was stopped, the reaction mixture was cooled to room temperature, and a precipitate was obtained by filtration. The resulting precipitate was washed with water and ethanol respectively to obtain a yellow solid iridium dichloro bridge compound (ppy) 2 Ir(μ-Cl) 2 Ir(ppy) 2 .

[0035] Add the iridium dichloro bridge compound, the auxiliary ligand diethyldithiocarbamate sodium salt (0.29g, 1.7mmol) and 24mL 2-ethoxyethanol into the double-necked flask, vacuum-fill ...

Embodiment 3

[0037] Based on iridium complexes (ppy) 2 Ir (ssc) phosphorescence chemical sensor response to mercury ion UV-visible absorption spectrum test such as image 3 shown, with Hg 2+ (0~4.0×10 -5 mol / L), (ppy) 2 Irsc acetonitrile solution (2.0×10 -5 mol / L) UV-Vis absorption spectrum changes significantly. The absorption peak at 290nm becomes weaker gradually, while the absorption peak at 250nm becomes stronger.

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Abstract

The invention discloses a phosphorescence chemical sensor and an application thereof. The phosphorescence chemical sensor is a compound based on an iridium composition containing a main ligand and an auxiliary ligand, wherein the main ligand is 2-phenylpyridine, and the auxiliary ligand is a dithio-carbamic acid derivate. The structure general formula of the phosphorescence chemical sensor is shown in a formula I. The phosphorescence chemical sensor achieves the goal of detecting metal ions by the color change of the solution or the film of the sensor, the change of an ultraviolet visible absorption spectrum and the change of a phosphorescence emission spectrum. The phosphorescence chemical sensor has the characteristics of the high phosphorescence response speed and big amplitude, is easy to differentiate from the fluorescence background and can be identified by naked eyes. The sensor has high identification sensitivity on the metal ions and high stability, and thereby, the sensor can be applied to the detection of the metal ions in various environments.

Description

technical field [0001] The invention relates to an iridium complex, in particular to a phosphorescent chemical sensor based on the iridium complex and its application. Background technique [0002] Mercury is one of the most threatening and toxic metal elements to human body and environment. There are three main forms of mercury in nature: elemental mercury, inorganic mercury and organic mercury. Mercury and its pollutants can be widely distributed through various natural or man-made processes such as volcanic eruptions, mining, and solid waste incineration, thereby polluting a large amount of water, air, and soil, and through the action of bacteria in the environment, mercury Both elemental and mercury ions can be converted into methylmercury, which can be further enriched in the human body through the food chain even in very low concentrations. Mercury pollution in the environment mainly comes from mercury used in industry, such as mercury used as a catalyst in the chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64C09K11/06C07F15/00
Inventor 王彪方园马文静
Owner SUN YAT SEN UNIV
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