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  • Title: 3-(7-Dimethylamino)coumarin N-phenylsemicarbazones in solution and polymer matrices: Tuning their fluorescence via para-phenyl substitution.
    Author: Cigáň M, Danko M, Donovalová J, Gašpar J, Stankovičová H, Gáplovský A, Hrdlovič P.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2014 May 21; 126():36-45. PubMed ID: 24577278.
    Abstract:
    The photo-physical properties of five new para-phenyl substituted derivatives of 3-(7-dimethylamino)coumarin N-phenylsemicarbazone with various electron-withdrawing substituents R (RF, Br, CF3, CN or NO2) in the para-position on the phenyl ring were investigated in solvents and in polymer matrices. Tuning their fluorescent properties via para-substitution is discussed in terms of Twisted Intra-molecular Charge-Transfer (TICT) state formation, specific solute-solvent interactions (hydrogen bonding), fluorescent H-aggregates formation, and the solvent polarity and polymer matrix effects.
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