Wang Xiuyun

Associate Professor   Supervisor of Master's Candidates

Gender:Female

Alma Mater:琦玉工业大学

Degree:Doctoral Degree

School/Department:化学学院

Discipline:Analytical Chemistry. Chemical Biology

Business Address:化学楼432

Contact Information:xiuyun@dlut.edu.cn

E-Mail:xiuyun@dlut.edu.cn


Paper Publications

Phosphonate-Substituted Ruthenium(II) Bipyridyl Derivative as a Photoelectrochemical Probe for Sensitive and Selective Detection of Mercury(II) in Biofluids

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Indexed by:期刊论文

First Author:Wu, Shuo

Correspondence Author:Wu, S (reprint author), Dalian Univ Technol, Sch Chem, Dalian 116023, Peoples R China.

Co-author:Tu, Wenjuan,Zhao, Yanqiu,Wang, Xiuyun,Song, Jie,Yang, Xinlan

Date of Publication:2018-12-18

Journal:ANALYTICAL CHEMISTRY

Included Journals:SCIE、PubMed、Scopus

Volume:90

Issue:24

Page Number:14423-14432

ISSN No.:0003-2700

Key Words:Body fluids; Chromophores; Electrochemistry; Energy gap; Mercury compounds; Nanoparticles; Organic polymers; Photocurrents; Photoelectrochemical cells; Photoelectrons; Photons; Probes; Synthesis (chemical); Tin oxides; Titanium dioxide, Analytical performance; Conduction band energy; Photocurrent response; Photoelectrochemicals; Photophysical properties; Selective detection; Separation efficiency; Specific recognition, Ruthenium compounds

Abstract:A ruthenium(II) bipyridyl derivative photoelectrochemical probe, Ru-1, is synthesized and coupled with TiO2 nanoparticles (Ru-1/TiO2) for the specific recognition and highly sensitive photoelectrochemical (PEC) detection of Hg2+ in a series of biofluids. The probe is designed with a chromophore, a thiocyanate recognition unit, a pi-conjugated photoelectron-transfer pathway, and a phosphonate anchor. TiO2 nanoparticles with strong affinity to phosphonate and suitable conduction band energy are used as intermediate layers to increase the Ru-1 adsorption amount and amplify the photocurrent response. Under irradiation, the Ru-1/TiO2/fluorine-doped tin oxide (FTO), with strong visible light harvesting capacity, aqueous stability, and efficient photoelectron transfer, shows a high and stable photocurrent response. In the presence of Hg2+, however, the specific Hg2+ and NCS coordination changes the photophysical properties of Ru-1, imposing the probe with a wider band gap, a weaker absorbance, and a poorer photoelectron and hole separation efficiency, thus resulting in a significant photocurrent decrease. On the basis of the Hg2+-induced photocurrent change, the Ru-1/TiO2/FTO shows good selectivity and high sensitivity toward the PEC detection of Hg2+, with wide linear ranges from 10(-12) to 10(-7) and 10(-7) to 10(-3) g/mL, and a low limit of detection of 0.63 pg/mL. The PEC probe is recyclable and accurate for selective detection of Hg2+ in urine, serum, and cell extracts. The whole analysis can be completed within 15 min. These good analytical performances indicate that the PEC method might have great potential for the onsite detection of small molecules in biosystems.

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在日本埼玉工业大学获得博士学位,在日本东京工业大学从事产学官连携研究员(博士后)研究2年,现就职于大连理工大学 化学学院 硕士生指导教师,副教授。