Synthesis, characterization, and thermoelectric properties of a conducting copolymer of 1,12-bis(carbazolyl)dodecane and thieno[3,2-b]thiophene
Synthesis, characterization, and thermoelectric properties of a conducting copolymer of 1,12-bis(carbazolyl)dodecane and thieno[3,2-b]thiophene
复制标题
DOI：
10.1007/s10008-011-1292-0
复制
发表时间：
2011
影响因子：
2.5
通讯作者：
Ruirui Yue;Shuai Chen;Cong-cong Liu;Baoyang Lu;Jingkun Xu;Jianmin Wang;Guodong Liu
中科院分区：
文献类型：
--
作者：
Ruirui Yue;Shuai Chen;Cong-cong Liu;Baoyang Lu;Jingkun Xu;Jianmin Wang;Guodong Liu
在含30%二氯甲烷的三氟化硼二乙酯中，将1,12-二（咔唑基）十二烷（2Cz-D）与噻吩（TT）直接阳极氧化，电化学合成了导电共聚物聚（1,12-二（咔唑基）十二烷-co-噻吩[3,2-b]噻吩）(P（2Cz-D-co-TT）。形成的共聚物具有较高的氧化还原活性和可逆性，并具有良好的导电性能。形成共聚物的发光性能与各自的均聚物不同，可以通过改变单体投料比来调节。热电研究表明，共聚物薄膜在室温下的电导率在0.1 ~ 0.3 S cm−1之间，低于聚噻吩[3,2-b]噻吩（PTT）的电导率（0.42 S cm−1），但比聚（1,12-二（咔唑基）十二烷）（P2Cz-D）的电导率（10−3S cm−1）高两个数量级。与PTT和P2Cz-D相比，共聚物的塞贝克系数和功率因数均有不同程度的提高。正如预期的那样，PTT和P2Cz-D的热电性能都通过共聚得到改善，这可能有利于新型有机热电材料的探索和研究。
Poly(1,12-bis(carbazolyl)dodecane-co-thieno[3,2-b]thiophene) (P(2Cz-D-co-TT)), a conducting copolymer was synthesized electrochemically by direct anodic oxidation of 1,12-bis(carbazolyl)dodecane (2Cz-D) and thieno[3,2-b]thiophene (TT) in boron trifluoride diethyl ethrate containing 30% (vol) dichloromethane. As-formed copolymers exhibited high redox activity and reversibility and good conductive properties. The emitting property of as-formed copolymer was different from those of respective homopolymers, and could be tuned by changing the initiate monomer feed ratios. Thermoelectric investigations revealed that the electrical conductivities of as-obtained copolymer films were between 0.1 and 0.3 S cm−1at ambient temperature, lower than that of polythieno[3,2-b]thiophene (PTT) (0.42 S cm−1) but two orders of magnitude higher than that of poly(1,12-bis(carbazolyl)dodecane) (P2Cz-D) (10−3S cm−1). The Seebeck coefficients and the power factors of the copolymers were improved with different degrees compared with those of PTT and P2Cz-D. As expected, the thermoelectric performance of PTT and P2Cz-D were both improved through copolymerization, which may be beneficial to the exploration and investigation of novel organic thermoelectric materials.