Synthesis of a 4,9-Didodecyl Angular-Shaped Naphthodiselenophene Building Block To Achieve High-Mobility Transistors
作者:Che-En Tsai、Ruo-Han Yu、Fang-Ju Lin、Yu-Ying Lai、Jhih-Yang Hsu、Sheng-Wen Cheng、Chain-Shu Hsu、Yen-Ju Cheng
DOI:10.1021/acs.chemmater.6b02042
日期:2016.7.26
A new tetracyclic 4,9-dialkyl angular-shaped naphthodiselenophene (4,9-α-aNDS) was designed and synthesized. The naphthalene core in 4,9-α-aNDS is formed by the DBU-induced 6π-cyclization of an (E)-1,2-bis(3-(tetradec-1-yn-1-yl)selenophen-2-yl)ethene intermediate followed by the second PtCl2-catalyzed benzannulation. This synthetic protocol allows for incorporating two dodecyl groups regiospecifically at 4,9-positions of the resulting α-aNDS. An ordered supramolecular self-assembly formed via noncovalent selenium–selenium interactions with a short contact of 3.5 Å was observed in the single-crystal structure of 4,9-α-aNDS. The distannylated α-aNDS building block was copolymerized with Br-DTFBT and Br-DPP acceptors by Stille cross coupling to form two new donor–acceptor polymers PαNDSDTFBT and PαNDSDPP, respectively. The bottom-gate/top-contact organic field-effect devices using the PαNDSDTFBT and PαNDSDPP semiconductors accomplished superior hole mobility of 3.77 and 2.17 cm2 V–1 s–1, respectively, which are among the highest mobilities reported to date.
设计并合成了一种新的四环4,9-二烷基角形萘二硒烯(4,9-α-aNDS)。4,9-α-aNDS中的萘核心是通过DBU催化的6π环化反应,从(E)-1,2-二(3-(十四烷-1-炔-1-基)硒苯-2-基)乙烯中形成的,紧接着进行第二步的PtCl2催化芳构化。这一合成方法允许在生成的α-aNDS的4,9位以区域专一性的方式引入两个十二烷基团。在4,9-α-aNDS的单晶结构中观察到了通过非共价硒–硒相互作用形成的有序超分子自组装,接触距离为3.5Å。附有双锡基团的α-aNDS构件通过Stille交叉偶联与Br-DTFBT和Br-DPP受体共聚合,分别形成两种新的供体–受体聚合物PαNDSDTFBT和PαNDSDPP。使用PαNDSDTFBT和PαNDSDPP半导体的底栅/顶接触有机场效应器件实现了超高的孔迁移率,分别为3.77和2.17 cm² V⁻¹ s⁻¹,这些是迄今为止报告的最高迁移率之一。