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2003-2022 全部
为您找到包含“bromine substitution”的内容共2

魏冬,方磊,刘青青,叶宇康

2016-05-19

多溴联苯醚是一类广泛应用并在全球环境中经常检出的溴代阻燃剂。本文采用低压汞灯为光源,通过纯水和正己烷两种反应体系中典型多溴联苯醚同类物光降解过程的对比研究,分析了多溴联苯醚分子结构对其光解特性的影响规律。实验数据显示,多溴联苯醚物质的溴取代位置和溴取代数目是影响其光化学反应活性的重要因素,其影响规律同时受到反应介质的作用。

高等学校博士学科点专项科研基金(20120101120063

浙江大学建筑工程学院,杭州 310058,浙江大学建筑工程学院,杭州 310058,浙江大学建筑工程学院,杭州 310058,浙江大学建筑工程学院,杭州 310058

#环境科学技术#

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Zeng Ting,Sun Bin,Lordrick Wangatia,Zhu Meifang

N,N'-bis(n-dodecyl)-3,4:9,10-tetracarboxyl-diimide(1,7-H-PDI-C12) and its corresponding 1,7-Br substitution at bay position (1,7-Br-PDI-C12) have been synthesized and characterized using 1H-NMR, 13C-NMR, FT-IR, spectrum and WAXD. A comparison of the two samples photophysical properties using UV-vis and fluorescence emission spectra reveal that bay substitutions of PDI with bromine do not have significant effect on the PDI photophysical properties in solution. However, the solid state fluorescence properties were enhanced by the bay area bromination. Solid Фf as high 2.83% was obtained for 1,7-Br-PDI-C12 as compare to 0.02% for 1,7-H-PDI-C12, this was also reflected in the solid flourescence emmision. This work shows that we can improve solid state photophysical properties of PDI without changing the other properties by simply using bromine bay area substitution. These types of materials are useful intermidiate for further synthesis of perylene diimide with tunnable optoelectronic properties.

2014-01-15

the Doctoral Fund of Ministry of Education of China (No. 20100075120012

the NNSF for Distinguished Young Scholar of China(No.50925312

the Shanghai Nano Special Project(No.1052nm02800

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 201620, Shanghai, P. R. China ,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 201620, Shanghai, P. R. China ,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 201620, Shanghai, P. R. China ,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 201620, Shanghai, P. R. China

#Materials Science#

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