Influence of catalytic systems in Stille polymerization on the electrochromic performance of diketopyrrolopyrrole-based conjugated polymers†,Materials Chemistry Frontiers

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Influence of catalytic systems in Stille polymerization on the electrochromic performance of diketopyrrolopyrrole-based conjugated polymers†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2017-12-13 00:00:00 , DOI: 10.1039/c7qm00377c
Wei Teng Neo _{1,

2,

3,

4,

5} , Qun Ye _{1,

2,

3} , Zugui Shi _{1,

2,

3} , Soo-Jin Chua _{1,

2,

3,

5,

6} , Jianwei Xu _{1,

2,

3,

5,

7}

Affiliation

Two diketopyrrolopyrrole- (DPP) and thienothiophene-based donor–acceptor (D–A) type conjugated polymers are separately synthesized using Stille coupling reactions with Pd(PPh₃)₄ and PdCl₂(PPh₃)₂ catalytic systems, respectively. The influence of the catalyst employed on the structural regularity of the resulting polymers, and their subsequent electrochromic (EC) performances are investigated. Marked differences in the optical contrasts, switching times, coloration efficiencies and redox stabilities of the polymers are uncovered. For example, polymer P1, which is prepared using Pd(PPh₃)₄ as a catalyst, exhibited a larger optical contrast and coloration efficiency by 40% and 79%, respectively, and a faster coloration time by 55%, at 825 nm, than its counterpart polymer P2, which is prepared using PdCl₂(PPh₃)₂. The intrinsic optical, electrochemical and morphological properties of the polymers are characterized, revealing that the physical conformation and packing of the polymer chains are the main factors causing the discrepancy in EC performances.

中文翻译：

Stille聚合反应中催化体系对二酮吡咯并吡咯基共轭聚合物电致变色性能的影响†

使用Stille偶联反应分别使用Pd（PPh ₃）₄和PdCl ₂（PPh ₃）₂催化体系分别合成了两种二酮基吡咯并吡咯（DPP）和噻吩并噻吩类供体-受体（DA）型共轭聚合物。研究了所用催化剂对所得聚合物结构规则性的影响及其随后的电致变色（EC）性能。未发现聚合物的光学对比度，转换时间，着色效率和氧化还原稳定性方面的显着差异。例如，使用Pd（PPh ₃）₄制备的聚合物P1作为催化剂，与使用PdCl ₂（PPh ₃）制备的对应聚合物P2相比，在825 nm处，其光学对比度和着色效率分别提高了40％和79％，着色时间加快了55％。₂。表征了聚合物的固有光学，电化学和形态学特性，表明聚合物链的物理构象和堆积是引起EC性能差异的主要因素。

更新日期：2017-12-13

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