摘要
以二价钯配合物作为催化剂,将2-异丙基氨基-4,6-二(2′-溴-3,4-乙撑二氧噻基)-1,3,5-三嗪分别与1,4-二乙炔基-2,5-二辛氧基苯、1,4-二乙炔基-2,5-二(十二烷氧基)苯、2,7-二(4,4,5,5-四甲基硼烷基)-9,9-二辛基芴交替共聚合成了3种π-共轭聚合物P1,P2和P3。经傅里叶变换红外光谱、氢核磁共振谱、紫外-可见光谱、荧光光谱、循环伏安法、X射线粉末衍射和凝胶渗透色谱等测试手段对其进行了表征,并对聚合物在CHCl3溶液的酸致变色行为进行了研究。结果表明,得到的聚合物在CHCl3中的紫外-可见最大吸收波长分别在443nm和431nm处出现。在CHCl3溶液中聚合物P1,P2和P3最大发射峰分别位于507nm,511nm和543nm,其聚合物薄膜的最大发射波长分别为573nm,557nm和559nm。与P1和P2相比,P3的酸致变色敏感性高于2个数量级。聚合物P1和P2均在-2.0~0V出现n-掺杂峰。聚合物X射线衍射谱图显示聚合物均有一定的结晶性。
2-Diisopropylamino-4,6-bis(2′-bromo-3,4-ethylenedioxythiophenyl)-s-triazine was co-polymerized with 1,4-diethynyl-2,5-bis(octyloxy)benzene,1,4-diethynyl-2,5-bis(dodecyloxy)benzene and 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-dioctylfluorene using Pd(Ⅱ)complex as catalyst to prepareπ-conjugated polymers as P1,P2 and P3.The structures of polymers were performed by FT-IR,1 H-NMR,UV-Vis spectrophotometry(UV),fluorescence spectroscopy(PL),gel permeation chromatography(GPC),cyclic voltammogram(CV),XRD,and acidichromic properties of polymers were studied in CHCl3 solution.The results show that UV-vis maximum absorption appears at 443 nm and 431 nm in CHCl3 solution,respectively.The maximum emission peaks of P1,P2 and P3appear at 478 nm,549nm and 523 nm in CHCl3 solution and 573 nm,557nm and 573 nm in film state,respectively.Comparing to P1 and P2,the acidochromic sensitivity of P3 is two orders of magnitude higher.P1 and P2have n-doped peaks in the regions from-2.0Vto 0V.XRD patterns of polymers represent that polymers have certain crystallinity.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第6期34-40,共7页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(20864002)
