Construction of 2,3-disubstituted benzo[b]thieno[2,3-d]thiophenes and benzo[4,5]selenopheno[3,2-b]thiophenes using the Fiesselmann thiophene synthesis

Abstract

A number of 2,3-disubstituted benzo[b]thieno[2,3-d]thiophenes and benzo[4,5]selenopheno[3,2-b]thiophenes have been obtained using a convenient approach based on the Fiesselmann thiophene synthesis.

Theoretical Perspective toward Designing of 5-Methylbenzo [1,2-b:3,4-b′:6,5-b″] trithiophene-Based Nonlinear Optical Compounds with Extended Acceptors

“…Moreover, BTT’s asymmetrical distribution of the electronic cloud enhances the exciton dissociation efficiency and boosts the dipole moment. Because of its outstanding characteristics, BTT has become a viable option for building high-performance NLO materials. , …”

“…Because of its outstanding characteristics, BTT has become a viable option for building high-performance NLO materials. 28,29 Therefore, keeping in view the previous discussion, in this study we have chosen an organic fullerene free BTT Further, in the parent compound (BTTBo-4F), the bulky groups, i.e., 2-methyldecane and 2-butyloctanal, attached to the π-spacer and donor are substituted by methyl (−CH 3 ) to lessen the computational cost and to avoid steric hindrance due to the large alkyl chains. Now the compounds are renamed BTTBo-4F to DCTMR (Figure 1).…”

“…Because of its outstanding characteristics, BTT has become a viable option for building high-performance NLO materials. 28 , 29 …”

Novel benzo[b]thieno[2,3-d]thiophene derivatives with an additional alkyl-thiophene core: synthesis, characterization, and p-type thin film transistor performance

“…54 There have been several reports on BTT-based OSCs with noticeable performance, but mostly via the vacuum deposition method. 54–59 For instance, Chen et al reported various OSCs based on the BTT core and different π-bridge spacers with a low HOMO level and large band gaps, resulting in a maximum mobility of 0.50 cm 2 V −1 s −1 with decent environmental stability. 55 Similarly, Huang et al designed BTT derivatives with various end-functional groups and adjusted substrate temperatures to achieve mobilities as high as 0.22 cm 2 V −1 s −1 .…”