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Determination of Biotin in Pharmaceutical Formulations by Potassium Permanganate-luminol-cdte nanoparticles Chemiluminescence System

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Chemical Research in Chinese Universities 2012年第4期28卷 604-608页

作者： TRAORE Zoumana Sékou SU Xing-guang College of Chemistry Jilin University

A sensitive flow-injection chemiluminescence method was developed for the determination of biotin in the pharmaceutical *** affinity between avidin and biotin was used to adsorb biotin on the polystyrene,with subsequent quantification of biotin based on its ability to enhance the chemiluminescence（CL） signal generated by the redox reaction of potassium permanganate-luminol-cdte nanoparticles CL *** investigations prove that apart from 3-aminophthalate,the cdte quantum dots（QDs） play both catalytic and emitter *** optimum conditions,the linear range for the determination of biotin was 0.01―25 ng/mL with a detection limit of 7.3×10-3 ng/mL（S/N=3）.The relative standard deviation of 5 ng/L biotin was 2.06%（n=7）.The proposed method was used to determine the biotin concentration in the pharmaceutical formulations and the recovery was between 96.4% and 104%.The proposed method is simple,convenient,rapid and sensitive.

关键词： Flow-injection Chemiluminescence Biotin cdte nanoparticle

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Photoelectrochemical performance of a sub-micron structured film with poly(3-methylthiophene) (P3MT)-modified cdte/ZnO shell-core sub-micron tube arrays

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Science China Chemistry 2013年第6期56卷 755-762页

作者： HAO YanZhong LUO Chong SUN Bao SUN Shuo LI YingPin SHEN ShiGang XU DongSheng College of Sciences Hebei University of Science and Technology College of Chemistry and Environmental Science Key Laboratory of Medical Chemistry and Molecular DiagnosisHebei University Beijing National Laboratory for Molecular Sciences State Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesCollege of Chemistry and Molecular EngineeringPeking University

A sub-micron structured film with a poly(3-methylthiophene) (P3MT)-modified cdte/ZnO shell-core sub-micron tube array has been prepared by a series of electrodeposition processes, and a semiconductor-sensitized solar cell based on this structure was also fabricated. Vertically oriented ZnO sub-micron tubes were obtained on an indium tin oxide (ITO) substrate, and then cdte nanocrystals and a thin P3MT layer were electrodeposited sequentially onto the walls of the ZnO sub-micron tubes. A suitable thickness of cdte and P3MT could improve the photovoltaic properties of the solar cell, which was attributed to the enhancement in the light absorption and the decrease in the recombination of photogenerated carriers. In addition, a p–n heterojunction formed between the interface of cdte and P3MT played an important part in the efficient separation and fast transport of photogenerated carriers in the sub-micron structure. A power conversion efficiency of 1.20% was obtained with this type of solar cell.

关键词： semiconductor-sensitized solar cell cdte nanoparticle ZnO sub-micron tube array

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