Synthesis, Characterization and Electrochemical Properties of Polymers Based on Dithienothiophene and Bithiazole,Asian Journal of Organic Chemistry

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Synthesis, Characterization and Electrochemical Properties of Polymers Based on Dithienothiophene and Bithiazole
Asian Journal of Organic Chemistry ( IF 2.8 ) Pub Date : 2020-05-26 , DOI: 10.1002/ajoc.202000213
Fatma Dikcal _{1,

2} , Sebahat Topal ₁ , Murat Unal ₁ , Turan Ozturk _{1,

3}

Affiliation

Conjugated polymers are promising cost‐effective, lightweight, and flexible electrode materials. 3,5‐Dinonyl‐2,6‐di(thiophene‐2‐yl)dithieno[3,2‐b : 2′,3′d]thiophene (M1) as a donor and 4,4′‐dinonyl‐5,5′‐di(thiophen‐2‐yl)‐2,2′‐bithiazole (M2) as an acceptor were synthesized and their polymers poly(3,5‐dinonyl‐2,6‐di(thiophene‐2‐yl)dithieno[3,2 b : 2′,3′‐d]thiophene) (P1) and poly(4,4′‐dinonyl‐5,5′‐di(thiophen‐2‐yl)‐2,2′‐bithiazole) (P2) were obtained via electropolymerization on ITO/glass electrode surface in ACN : DCM (1 : 3 v/v) solution, containing 0.1 M tetrabutylammonium hexafluorophosphate (TBAPF₆). Then, a third polymer as a co‐polymer (P3) was synthesized through electropolymerization of a mixture of the monomers M1 and M2 in 1 : 1 ratio. All the polymers were characterized by UV‐Vis, CV and CV‐UV measurements. Moreover, capacitor properties of the polymers by potentiostatic electrochemical impedance spectroscopy (EIS) was performed. The polymers P1, P2 and P3 exhibited absorptions at 456, 453 and 519 nm in neutral state and their optical band gaps were determined to be 2.17, 2.53 and 1.95 eV, respectivetly. EIS measurements indicated that P3 had the highest current density, having lower resistance.

中文翻译：

二噻吩并噻吩和联噻唑的聚合物的合成，表征和电化学性能

共轭聚合物有望成为具有成本效益，重量轻且柔性的电极材料。3,5-二壬基-2,6-二（噻吩-2-基）二噻吩并[3,2-b：2'，3'd]噻吩（M1）作为供体和4,4'-二壬基-5，合成了作为受体的5′-二（噻吩-2-基）-2,2′-联噻唑（M2）及其聚合物聚（3,5-二壬基-2-6,6-二（噻吩-2-基）二噻吩并[3,2 b：2'，3'-d]噻吩）（P1）和聚（4,4'-二壬基-5,5'-二（噻吩-2-基）-2,2'-联噻唑）（P2）通过在含有0.1M四丁基六氟磷酸铵（TBAPF ₆）的ACN∶DCM（1∶3v / v）溶液中在ITO /玻璃电极表面上进行电聚合而获得。然后，将第三种聚合物作为共聚物（P3通过将单体M1和M2的混合物以1：1的比例进行电聚合来合成1）。所有聚合物均通过UV-Vis，CV和CV-UV测量来表征。此外，通过恒电位电化学阻抗谱法（EIS）进行了聚合物的电容器性能的研究。聚合物P1，P2和P3在中性状态下在456、453和519nm处显示吸收，并且它们的光学带隙分别确定为2.17、2.53和1.95eV。EIS测量表明，P3具有最高的电流密度，具有较低的电阻。

更新日期：2020-05-26

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