Photophysics of 9-aminoacridinium hydrochloride |
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Authors: | D D Pant G C Joshi H B Tripathi |
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Institution: | (1) Photophysics Laboratory, D.S.B. College, Kumaun University, 263 002 Nainital, India |
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Abstract: | The steady state and time domain spectroscopy of 9-aminoacridinium hydrochloride have been studied. 9-aminoacridine (I), 9-aminoacridinium
(II) and the double protonated ion (III) follow Waterman’s principle with respect to their spectra and lifetimes. It is established
that the excimer formation in (II) is from the ground state dimers which undergo either thermally-activated radiationless
excimer conversion or a geometrical rearrangement in the excited state at room temperature. The quenching of monomer emission
by dimers or foreign quenchers (KI) is found to be of transient nature as suggested by the continuum model.
The authors felicitate Prof. D S Kothari on his eightieth birthday and dedicate this paper to him on this occasion. |
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Keywords: | 9-aminoacridine excimer emission transient quenching rate constants |
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