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Highly stable binuclear ruthenium complex evaporation film electrode and its preparation method and application

A technology of binuclear ruthenium complex and evaporation film, which is applied in the field of electrochemistry, can solve the problems of long synthesis steps and difficult purification, and achieve excellent stability and wide application prospects

Inactive Publication Date: 2017-03-22
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis steps of these complexes are long and the purification is difficult. Among the electrodes modified by these complexes, there are no reports in the literature on thin film electrodes that exhibit highly stable pH-induced photocurrent switching properties.

Method used

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  • Highly stable binuclear ruthenium complex evaporation film electrode and its preparation method and application
  • Highly stable binuclear ruthenium complex evaporation film electrode and its preparation method and application
  • Highly stable binuclear ruthenium complex evaporation film electrode and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1, L1, L2, L3 and two ruthenium complexes [(L1)Ru(L2)Ru(L1)] (ClO 4 ) 4 and [(L1)Ru(L3)Ru(L1)](ClO 4 ) 4 preparation of

[0032] 1. Ligand L1 according to the literature [Yu, S.C.; Hou, S. and Chan, W.K. Synthesis, metal complexformation, and electronic properties of a novel conjugate polymer with atidentate2,6-bis(benzmidazol-2-yl)pyridine ligand.Macromolecules 1999,32,5251-5256.] Method preparation.

[0033] 2. Preparation method of ligand L2:

[0034]1,2,4,5-Benzenetetramine hydrochloride (0.33g, 1.16mmol) mixed with polyphosphoric acid (63g) and the mixture after removing hydrogen chloride was light brown, 4'-(4-carboxyphenyl)- 2,2′:6′,2″-Terpyridine hydrobromide (1.20g, 2.33mmol). After reacting at 230°C for 5 hours, the dark brown viscous liquid was poured into 600mL water, and a yellow-green precipitate was obtained. After mixing, it turned yellow. The crude product was recrystallized with N,N-dimethylformamide, and dried in vacuo to give a yellow p...

Embodiment 2

[0053]Example 2. Preparation of Evaporated Film Electrode and Measurement of Photoelectric Properties

[0054] (1) Preparation of ruthenium complex evaporation film electrode

[0055] 1. Clean indium-tin oxide (ITO) conductive glass. Cut the ITO glass into small pieces of 1.5 cm x 4 cm. Sequentially use detergent, once water ultrasonic cleaning three times, each ultrasonic 15 minutes, and finally use concentrated ammonia water: hydrogen peroxide: primary water = 1:1:5 mixed solution at 70°C for half an hour. After taking it out, clean it ultrasonically with water once, and finally blow it dry with an ear washing ball and put it in a small bottle, dry it for later use.

[0056] 2. Dissolve the ruthenium complex with a small amount of dimethyl sulfoxide, add a large amount of acetonitrile to dilute, take a certain amount of solution and apply it on the ITO, evaporate and dry to obtain a stable evaporation film.

[0057] (2) Optimization of preparation conditions for ruthenium...

Embodiment 3

[0062] Example 3. Photoelectric Performance Measurement of Evaporated Film Electrode

[0063] (1) Electrochemical test

[0064] The electrochemical test was carried out in a CHI-601 electrochemical workstation, using a three-electrode system, a saturated calomel electrode as the reference electrode, a platinum wire as the counter electrode, and an evaporated film as the working electrode. The supporting electrolyte was BR buffer, the pH was adjusted with saturated sodium hydroxide solution and concentrated hydrochloric acid, and the cyclic voltammetry at different pH was measured.

[0065] (2) Photoelectrochemical test

[0066] The light source is a 500W ultra-high pressure spherical xenon lamp high-brightness light source system (Beijing Changtuo Technology Co., Ltd.); the photocurrent-induction time curve (I-t curve) of the evaporated film is measured on a CHI-601 electrochemical workstation, and the supporting electrolyte is BR buffer. The pH was adjusted with saturated s...

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Abstract

The invention discloses a binuclear ruthenium complex evaporated film electrode with the stable height, a preparation method of the binuclear ruthenium complex evaporated film electrode and application of the binuclear ruthenium complex evaporated film electrode. Binuclear ruthenium complexes form stable thin films on an electrode through a simple evaporation method, the photoelectric property measured result of the thin films is displayed, the thin films formed by the binuclear ruthenium complexes make sensitive responses to pH and have excellent stability, a cyclic voltammogram is basically kept unchanged after scanning is conducted by 50 circles, the oxidation reduction potential of the thin films is negatively shifted along with increase of pH, and the thin films are prone to oxidization. Light currents are remarkably reduced along with increase of pH, and the pH inducing switch characteristics of the light currents are presented. Thus, the binuclear ruthenium complex evaporated film electrode has wide application prospects in the fields of sensing, switching, energy conversion and storage devices.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and relates to a highly stable binuclear ruthenium complex evaporation film electrode, a preparation method thereof and applications in related fields of pH sensing and photoelectric switches. Background technique [0002] Ruthenium polypyridine complexes exhibiting highly tunable optical, redox, and photoelectrochemical properties under external stimuli have attracted extensive research interest due to their potential applications in sensing / switching, energy conversion, and storage devices [M. Montalti, S. Wadhwa, W. Y. Kim, R. A. Kipp, R. H. Schmehl, Inorg. Chem. 39 (2000) 76.]. Stable immobilization of these complexes on solid-state substrates is crucial for the practical application of the complexes [M.A. Haga, K. Kobayashi, T. Katsuaki, Coord. Chem. Rev. 251 (2007) 2688.]. Grafting of carboxylic acid and phosphate groups onto oxide surfaces or sulfhydryl groups onto metal surfaces has prove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B5/00H01B5/14H01B13/00
Inventor 王克志薛龙新段智明孙伟海
Owner BEIJING NORMAL UNIVERSITY