Unusual Solvatofluorochromism of the Asymmetrically Substituted Aromatic Acetylene Derivative CNAacDMA ** | Zendy

Bylińska Irena | Zendy; Szabelski Mariusz | Zendy; Wiczk Wiesław | Zendy

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Unusual Solvatofluorochromism of the Asymmetrically Substituted Aromatic Acetylene Derivative CNAacDMA **

Author(s) -

Bylińska Irena,

Szabelski Mariusz,

Wiczk Wiesław

Publication year - 2021

Publication title -

chemphyschem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.016

H-Index - 140

eISSN - 1439-7641

pISSN - 1439-4235

DOI - 10.1002/cphc.202000804

Subject(s) - acetylene , excited state , photochemistry , chemistry , anthracene , fluorescence , intramolecular force , derivative (finance) , polar , aromatic hydrocarbon , hydrocarbon , organic chemistry , atomic physics , physics , quantum mechanics , astronomy , financial economics , economics

The photophysical properties of the newly synthesized unsymmetrically substituted aromatic acetylene derivative 9‐(2‐(4‐( N,N ‐dimethylamino)phenyl)ethynyl)anthracene‐10‐carbonitrile (CNAacDMA) were investigated with the steady‐state and time‐resolved fluorometry. In saturated hydrocarbon solvents, only fluorescence from a locally‐excited state (LE) is recorded. In more polar solvents however, excitation of this dye leads to a charge transfer state (CT). In moderate polar solvents (ϵ=4–8) dual emission is observed as a result of competition between structural change and intramolecular charge transfer in the excited state. In polar solvents only one emission band, at shorter wavelength than CT emission, is observed, indicating a bidirectional solvatofluorochromism.

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