Indexed by:期刊论文
Date of Publication:2014-06-17
Journal:ANALYTICAL CHEMISTRY
Included Journals:SCIE、EI、PubMed、Scopus
Volume:86
Issue:12
Page Number:5922-5928
ISSN No.:0003-2700
Abstract:A novel triphenylamine-based organic dye, TTA, with an acrylic group is designed to graft TiO2 nanoparticles for sensitive and selective photoelectrochemical sensing. The synthesized TTA possesses a high molar absorption coefficient, leading to an enhanced photoelectron emission ability of the electron donor. The carboxyl group of TTA acts as not only an electron acceptor but also a linker to connect TTA to TiO2 nanoparticles. Under irradiation, TTA shows fast intramolecular charge transfer from triphenylamine to carboxyl group via the pi-bridge of thiophene moiety, thus producing a sensitive photocurrent response. Meanwhile, the acrylic moiety provides an active site for the Michael addition reaction, which would destroy the pi-bridge and decrease the photocurrent response. Thus, a selective photoelectrochemical sensing strategy is proposed for detection of small biomolecules. Using cysteine as a model analyte, this sensing strategy shows a detectable range from 1 to 200 mu M, without the interference from natural amino acids and various biological reducing reagents. This work offers a new photoelectrochemical route to highly selective and sensitive detection of biologically important small molecules.
Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Main positions:化学学院副院长
Other Post:辽宁省教学名师,宝钢优秀教师特等奖提名奖,中国分析测试学会青年学术委员会委员
Gender:Female
Alma Mater:南京大学
Degree:Doctoral Degree
School/Department:化学学院
Discipline:Analytical Chemistry. Biochemistry and Molecular Biolog
Business Address:化工综合楼C305
Open time:..
The Last Update Time:..