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J Am Chem Soc ; 134(34): 13915-7, 2012 Aug 29.
Artigo em Inglês | MEDLINE | ID: mdl-22900480

RESUMO

A series of selectively deuterated praseodymium cryptates has been synthesized. Their luminescence lifetimes in solution range from 150 to 595 ns for the (1)D(2) → (3)F(4) transition. Global fitting of the nonradiative deactivation rate differences of the isotopologic C-(H/D) oscillators revealed that aromatic C-D overtones anomalously quench the luminescence more than C-H vibrations. This is explained by the dominance of Franck-Condon overlap factors that greatly favor C-D oscillators, which are in almost ideal resonance with the relevant energy gap (1)D(2)-(1)G(4) of praseodymium.

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