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A Strap Strategy for Construction of an Excited‐State Intramolecular Proton Transfer (ESIPT) System with Dual Fluorescence
Author(s) -
Suzuki Naoya,
Fukazawa Aiko,
Nagura Kazuhiko,
Saito Shohei,
KitohNishioka Hirotaka,
Yokogawa Daisuke,
Irle Stephan,
Yamaguchi Shigehiro
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201404867
Subject(s) - intramolecular force , chromophore , photochemistry , excited state , chemistry , fluorescence , proton , amine gas treating , aqueous solution , alkyl , solvent polarity , electron transfer , solvent , stereochemistry , organic chemistry , physics , quantum mechanics , nuclear physics
An amine‐embedded flexible alkyl strap has been incorporated into an emissive boryl‐substituted dithienylpyrrole skeleton as a new entity of excited‐state intramolecular proton transfer (ESIPT) chromophores. The π‐electron system shows a dual emission, which covers a wide range of the visible region depending on the solvent polarity. The incorporation of the aminoalkyl strap as well as the terminal boryl groups efficiently stabilize the zwitterionic excited‐state species resulting from the ESIPT even in an aqueous medium.