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Dual-functional hydrogen-bonded organic frameworks for aniline and ultraviolet sensitive detection

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Chinese Chemical Letters 2021年第10期32卷 3109-3112页

作者： Zhijun Ke Kexin Chen Zhenzhen Li Jie Huang Zizhu Yao Wen Dai Xiaofan Wang Chulong Liu Shengchang Xiang Zhangjing Zhang Fujian Provincial Key Laboratory of Polymer Materials College of Chemistry and Materials ScienceFujian Normal UniversityFuzhou 350007China

A novel hydrogen-bonded organic frameworks(HOFs)FJU-200 has been constructed from N,N’-bis(5-isophthalic acid)naphthalimide(H_(4)L).FJU-200 has a good dual-function of aniline and ultraviolet detection.FJU-200 is the first case of HOF with dual sensing of visual color changes and photoluminescence quenching for aniline detection,and the detection limit of aniline can reach5.5 x 10^(-4)mol/L.Under ultraviolet FJU-200 will rapidly change from light yellow to rustic brown,which makes it possible to use FJU-200 to achieve minute-level ultraviolet detection.Moreover,for more convenient use,FJU-200 test papers are prepared.Using them,convenient and fast aniline or ultraviolet detection can be realized.The single-crystal X-ray structures show that compared with the original FJU-200,both PhNH_(2)@FJU-200 and UV-FJU-200 have larger pore sizes,and the dihedral angles of the H_(2)L^(2-)in framework has been changed.

关键词： Hydrogen-bonded organic frameworks(HOFs) Dual-function Aniline detection ultraviolet detection Sensitive

Determination of toluene diisocyanate in synthetic-rubber track by ion chromatography with ultraviolet detection after alkaline suppressor

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Chinese Chemical Letters 2009年第2期20卷 207-209页

作者： Mei Lan Chen Yun Chang Fan Chang An Li Dong Fei Yan Zhu Biology and Environment College of Zhejiang Shuren University Hangzhou 310015 China Department of Chemistry Xixi Campus Zhejiang University Hangzhou 310028 China School of Economics and Management Zhejiang University of Science and Technology Hangzhou 310023 China Department of Material and Chemical Engineering Guilin University of Technology Guilin 541004 China

In the present work, a novel analytical method was proposed for the determination of toluene diisocyanate （TDI） in syntheticrubber track by ion chromatography （IC） coupled with an ultraviolet detector setting at 212 nm. TDI can be hydrolyzed to toluene diamine （TDA） which can be separated by cation-exchange IC easily. The optimum IC separation was performed on an IonPac CS12A column （150 mm ×4.0 mm） using 20 mmol L^-1 sodium sulfate, 10 mmol L^-1 sulfuric acid and 10% acetonitrile as eluent. It was found that a higher signal response of TDA could be obtained under alkaline condition. A suppressor was used to change the acidic eluent into alkaline one. 0.8 mol L^-1 potassium hydroxide was chosen as the optimum regeneration eluent. With the added suppressor and regenerant, signal response was magnified by about 16 times and lower limit of detection （LOD, 0.13 μg L^-1） was obtained. Within-day relative standard deviation （R.S.D.） was less than 3.6%. The recoveries of TDI spiked in synthetic-rubber track samoles were 96.4-110.6%.

关键词： Ion chromatography （IC） ultraviolet detection Toluene diisocyanate （TDI）

Organometallic perovskite single crystals grown on lattice-matched substrate for photodetection

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Nano Materials Science 2020年第3期2卷 292-296页

作者： Xin Wang Yuwei Li Yubing Xu Yuzhu Pan Yao Wua Guanwen Li Wei Zhang Shuyi Ding Jing Chen Wei Lei Dewei Zhao Joint International Research Laboratory of Information Display and Visualization School of Electronic Science and EngineeringSoutheast UniversityNanjing210096China Shenzhen China Star Optoelectronics Semiconductor Display Technology Co.Ltd. ShenZhen518132China School of Information Engineering Nanjing Normal University Taizhou CollegeTaizhouChina Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization The University of ToledoToledoOH43606United States

In this work,we demonstrate that an organometallic perovskite(OP)single crystal for effective photodetection can be grown on a gold(Au)-decorated substrate using liquid phase epitaxy.The covered gold could both control the shape of the epitaxial layer and act as its electrodes.An MAPbCl3 single crystal and an MAPbBr1.5Cl1.5 single crystal were used as the substrate and the epitaxial layer,respectively.The device,with an Au-perovskite-Au structure,can be fully characterized.Due to the high-quality epitaxial layer,the maximum external quantum efficiency(EQE)value is over 60%under the voltage of20 V.In addition,the response speed can reach 200 and 500 ns(ns)rise and fall,respectively.Our work provides an effective and promising method to fabricate efficient perovskite-based photodetectors.

关键词： Perovskite single crystals Liquid phase epitaxy ultraviolet detection

Recent progress of SiC UV single photon counting avalanche photodiodes

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Journal of Semiconductors 2019年第12期40卷 59-69页

作者： Linlin Su Dong Zhou Hai Lu Rong Zhang Youdou Zheng School of Electronic Science and Engineering Nanjing University

4H-SiC single photon counting avalanche photodiodes(SPADs)are prior devices for weak ultraviolet(UV)signal detection with the advantages of small size,low leakage current,high avalanche multiplication gain,and high quantum efficiency,which benefit from the large bandgap energy,high carrier drift velocity and excellent physical stability of 4 H-SiC semiconductor material.UV detectors are widely used in many key applications,such as missile plume detection,corona discharge,UV astronomy,and biological and chemical agent detection.In this paper,we will describe basic concepts and review recent results on device design,process development,and basic characterizations of 4 H-SiC avalanche photodiodes.Several promising device structures and uniformity of avalanche multiplication are discussed,which are important for achieving high performance of 4 HSiC UV SPADs.

关键词： SiC avalanche photodiodes single photon counting ultraviolet detection