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A strap strategy for construction of an excited-state intramolecular proton transfer (ESIPT) system with dual
Naoya Suzuki1, Aiko Fukazawa, Kazuhiko Nagura
1Institute of Transformative Bio-molecules (WPI-ITbM) and Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya 464-8602 (Japan).
Abstract:
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.
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