Acceptor-Donor-Acceptor Type Small Molecular Low Band Gap Organic Semiconductors Containing 2-Dicyanomethylen- 3-cya n o-4, 5, 5-t rim ethyl-d i hyd rofu ran  

作　　者：Sanlong Chen Xiaolan Qiao Heping Li Hongxiang Li 

机构地区：[1]Key Laboratory of Road Structure and Material of Ministry of Transport (Changsha), Changsha University of Science and Technology, Changsha, Hunan 410114, China [2]Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China

出　　处：《Chinese Journal of Chemistry》2015年第8期934-938,共5页中国化学（英文版）

摘　　要：Acceptor-donor-acceptor type compounds WI--W3 were designed and synthesized. These compounds had the same donor moiety of 2,6-di（tbiophen-2-yl）dithieno[3,2-b：2＇,3＇-d]thiophene and different acceptor groups of 2-dicyanomethylen-3-cyano-4,5,5-trimethyl-2,5-dihydrofuran （TCF）, dicyanovinyl （DCV） and 3-ethyl-2-thioxothia- zolidin-4-one. Experimental results showed all compounds had high thermal stability and strong absorption in the visible light region. Among them, compound Wl with TCF as acceptor group displayed the lowest LUMO energy level of-3.74 eV and the smallest HOMO-LUMO band gap of 1.74 eV, suggesting the potential applications of TCF unit in low band gap organic semiconductors.Acceptor-donor-acceptor type compounds WI--W3 were designed and synthesized. These compounds had the same donor moiety of 2,6-di（tbiophen-2-yl）dithieno[3,2-b：2＇,3＇-d]thiophene and different acceptor groups of 2-dicyanomethylen-3-cyano-4,5,5-trimethyl-2,5-dihydrofuran （TCF）, dicyanovinyl （DCV） and 3-ethyl-2-thioxothia- zolidin-4-one. Experimental results showed all compounds had high thermal stability and strong absorption in the visible light region. Among them, compound Wl with TCF as acceptor group displayed the lowest LUMO energy level of-3.74 eV and the smallest HOMO-LUMO band gap of 1.74 eV, suggesting the potential applications of TCF unit in low band gap organic semiconductors.

关 键 词：low band gap compounds organic semiconductors donor-acceptor type conjugated molecules 

分 类 号：O734[理学—晶体学] TN304.5[电子电信—物理电子学]