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Restriction of Molecular Twisting on a Gold Nanoparticle Surface
Author(s) -
Debnath Tushar,
Dana Jayanta,
Maity Partha,
Lobo Hyacintha,
Shankarling Ganapati S.,
Ghosh Hirendra N.
Publication year - 2015
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.201500044
Subject(s) - intramolecular force , excited state , molecule , nanoparticle , charge (physics) , photochemistry , chemical physics , chemistry , materials science , nanotechnology , atomic physics , stereochemistry , physics , organic chemistry , quantum mechanics
To understand the photophysical properties of intramolecular charge transfer (ICT) and twisted intramolecular charge transfer (TICT) states on a gold nanoparticle (Au NP) surface, we have designed and synthesized a new coumarin molecule (C3) that exists both as ICT and TICT states in its excited state in a polar environment. On a Au NP surface, an excited C3 molecule only exists as an ICT state owing to restricted molecular rotation of a diethylamino group; as a result, no conversion from the ICT to TICT state was observed. Selection of the preferential state of a molecule with dual emitting states can be helpful for selected biological applications.