Premium
Cover Feature: Quinoid‐Aromatic Resonance for Very Small Optical Energy Gaps in Small‐Molecule Organic Semiconductors: A Naphthodithiophenedione‐oligothiophene Triad System (Chem. Eur. J. 63/2021)
Author(s) -
Kawabata Kohsuke,
Takimiya Kazuo
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202103681
Subject(s) - triad (sociology) , small molecule , cover (algebra) , organic semiconductor , resonance (particle physics) , semiconductor , materials science , band gap , chemistry , optoelectronics , physics , atomic physics , psychology , biochemistry , psychoanalysis , mechanical engineering , engineering
Near‐infrared absorbing properties are of great interest in organic semiconducting materials for near‐infrared‐active optoelectronic applications. A series of thienoquinoid‐containing molecules are presented that show very small optical energy gaps of down to 0.72 eV, corresponding to a wavelength of 1700 nm. The key to the very small optical energy gaps is an efficient quinoid‐aromatic resonance along the conjugated backbones that significantly reduces the bond length alternation. More information can be found in the Full Paper by K. Kawabata and K. Takimiya (DOI: 10.1002/chem.202102663).