Singhal Sanchita, Yadav Preeti, Naqvi Sheerin, Gupta Sonal, Patra Asit
Photovoltaic Metrology Section, Advanced Materials & Device Metrology Division, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India.
Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
ACS Omega. 2019 Feb 18;4(2):3484-3492. doi: 10.1021/acsomega.8b02811. eCollection 2019 Feb 28.
Three random copolymers , , and were obtained by electrochemical polymerization of donor-acceptor-donor monomers , , and with 3,4-ethylenedioxythiophene moiety, respectively, using a 1:1 molar ratio of the corresponding monomers, to find new properties and a more effective way to control the optoelectronic properties in conjugated system. For comparison purpose, polymers , , and were prepared from the corresponding monomer units -, respectively, by electrochemical polymerization. We also present efficient synthesis, characterization, and comparative density functional theory (DFT) calculations of the monomers - and polymers -. Cyclic voltammetry, spectroelectrochemistry, and electrochromic properties of all of the polymers - and copolymers , , and were carried out and a throughout comparison was made. We have shown that electrochemical copolymerization is a powerful strategy to tune the highest occupied molecular orbital energy level, band gap, and color of the copolymer. Thus, this finding clearly indicates that the copolymers show significantly different optoelectronic properties compared to their constituent polymers.
通过分别使用相应单体的1:1摩尔比，对具有3,4 - 亚乙基二氧噻吩部分的供体 - 受体 - 供体单体、和进行电化学聚合，得到了三种无规共聚物、和，以发现新的性质以及在共轭体系中控制光电性质的更有效方法。为了进行比较，聚合物、和分别由相应的单体单元 - 通过电化学聚合制备。我们还展示了单体 - 和聚合物 - 的高效合成、表征以及比较密度泛函理论（DFT）计算。对所有聚合物 - 和共聚物、和进行了循环伏安法、光谱电化学和电致变色性质研究，并进行了全面比较。我们已经表明，电化学共聚是调节共聚物最高占据分子轨道能级、带隙和颜色的有力策略。因此，这一发现清楚地表明，与它们的组成聚合物相比，共聚物表现出显著不同的光电性质。
