几种非对称二噻吩乙烯光致变色化合物的合成及性能研究
摘要随着信息时代的发展，人们对信息的传递和储存要求越来越高，光致变色材料对于信息传递和储存有多种优势，吸引了很多的科技工作者，其中一类重要的二噻吩乙烯化合物，因此成为焦点。本文在前人的基础和启发下，以2-甲基噻吩为原料，在实验条件下合成经过氯代，二酮加成，自身缩合反应制得1,5-二(5-氯-2-甲基噻吩)-环戊烯，并以该化合物为母体，进行官能团替换，实验过程中用 1HMNR及MS表征每步产物，最终得到三种非对称二噻吩乙烯化合物。对得到的三种非对称二噻吩乙烯化合物进行光照测试，UV/Vis谱图验证，以及和对称的二噻吩乙烯化合物对比，得出结论，非对称的二噻吩乙烯化合物在可见光区的吸收波长发生移动，有优良的可逆性。73230
毕业论文关键词 合成 光致变色 二噻吩乙烯
毕业设计说明书外文摘要
Title Synthesis and Properties of few unsymmetry Photochromic Diarylethene compounds
Abstract With the development of information age,requirement to people of information transfer and storage is highly demand,the photochromic materials for information transmission and storage has many advantages,attracting a lot of scientists,one of photochromic compounds named diarylethene becomes the focus。This article is based on the inspiration and research of predecessor , the 2-methyl thiophene as raw material, through chlorination, Dione addition and self shrinking cyclization reaction of 1,2-bis (5-chloro-2- methyl-3-thienyl-cycl through form pyridine and pyridine hydrochloride coupled single chlorine thiophene cyclopentene cyclopentene and pyridine 2 thiophene ring under the experiment condition,and with the compound as parent compound to replace its functional group,the conduct of every step is verified by 1H-MNR and MS,finally get three kinds unsymmetry diarylethene compounds。Then using UV-Vis spectra, irradiant experiment and compare with symmetry diarylethene compouncds,came to a conclusion that unsymmetry diarylethene compounds at visible light absorption wavelength has moved , moreover it has better reversibility than symmetry photochromic diarylethene compounds。
Keywords Synthesis Photochromism Diarylthene
目 次
1 引言 1
1。1 光致变色概述 1
1。1。1 光致变色的发展历程 2
1。1。2 制约光致变色发展的因素 2
1。1。4 光致变色材料的应用 3
1。2 二芳基乙烯类光致变色化合物概述 4
1。3 课题的提出及设计 5
2 实验部分 7
2。1 实验辅助设备 7
2。2 实验药品 7
2。3 实验方案设计 8
2。4 化合物的合成 9
2。4。1 5-氯-2-甲基噻吩 9
2。4。2 1,5-二(5-氯-2-甲基噻吩)-戊二酮 10
2。4。3 1,5-二(5-氯-2-甲基噻吩)-环戊烯 11
2。4。4 1-（2-甲基-5-氯-3-噻吩基）-2-（2-甲基-5-溴苯基-3-噻吩基）环戊烯