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Cover Picture: Synthesis, Structures, and Electronic Properties of Dithienosiloles Bearing Bulky Aryl Groups: Conjugation between a π‐Electron System and “Perpendicular” Aryl Groups (Asian J. Org. Chem. 6/2017)
Author(s) -
Tsurusaki Akihiro,
Kobayashi Atsushi,
Kyushin Soichiro
Publication year - 2017
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201700292
Subject(s) - aryl , chemistry , fluorescence , perpendicular , photochemistry , group (periodic table) , crystallography , bearing (navigation) , polymer chemistry , organic chemistry , optics , geometry , alkyl , physics , mathematics , cartography , geography
Dithienosiloles bearing 2,4,6‐triisopropylphenyl (Tip) and mesityl (Mes) groups at the 2,6‐positions have been synthesized. Although the bulky aryl groups have a perpendicular orientation to dithienosilole, they affect UV/Vis and fluorescence spectra. For example, these compounds show more intense fluorescence than the hydrogen‐substituted dithienosilole. The electronic effects of the perpendicular aryl groups are discussed. The cover graphic shows that intense blue fluorescence is emitted from the Tip‐substituted dithienosilole when it is excited with UV light. The hydrogen‐substituted dithienosilole is also shown for comparison. More information can be found in the Full Paper by Akihiro Tsurusaki, Atsushi Kobayashi, and Soichiro Kyushin on page 737 in Issue 6, 2017 (DOI: 10.1002/ajoc.201700058).