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Oxacycle‐Fused [1]Benzothieno[3,2‐ b ][1]benzothiophene Derivatives: Synthesis, Electronic Structure, Electrochemical Properties, Ionisation Potential, and Crystal Structure
Author(s) -
Mohankumar Meera,
Chattopadhyay Basab,
Hadji Rachid,
Sanguinet Lionel,
Kennedy Alan R.,
Lemaur Vincent,
Cornil Jérôme,
Fenwick Oliver,
Samorì Paolo,
Geerts Yves
Publication year - 2019
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201800346
Subject(s) - benzothiophene , heteroatom , chemistry , molecule , crystal structure , surface modification , stereochemistry , combinatorial chemistry , crystallography , organic chemistry , ring (chemistry) , thiophene
The molecular properties of [1]benzothieno[3,2‐ b ][1]benzothiophene (BTBT) are vulnerable to structural modifications, which in turn are determined by the functionalization of the backbone. Hence versatile synthetic strategies are needed to discover the properties of this molecule. To address this, we have attempted heteroatom (oxygen) functionalization of BTBT by a concise and easily scalable synthesis. Fourfold hydroxy‐substituted BTBT is the key intermediate, from which the compounds 2,3,7,8‐bis(ethylenedioxy)‐[1]benzothieno[3,2‐ b ][1]benzothiophene and 2,3,7,8‐bis(methylenedioxy)‐[1]benzothieno[3,2‐ b ][1]benzothiophene are synthesized. The difference in ether functionalities on the BTBT scaffold influences the ionisation potential values substantially. The crystal structure reveals the transformation of the herringbone motif in bare BTBT towards π‐stacked columns in the newly synthesized derivatives. The results are further justified by the simulated HOMO levels of the model compound.