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Thermochromic shifts of some molecular and exciplex fluorescence spectra

โœ Scribed by Thomas Hagan; Denis Pilloud; Paul Suppan

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
284 KB
Volume
139
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The displacement of the fluorescence band of several dipolar molecules and of the pyrene/N,N-dimethylaniline exciplex have been measured as a function of temperature in various solvents. The excited-state dipole moments calculated from these thermochromic shifts agree with those derived by other methods and this confirms the general validity of the thermochromic shift method for the estimation of excited-state dipole moments.

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The high-lying DO+, El, and G 1 spin-orbit states of the HgZn exciplex were excited by pump and probe laser irradiation of a Hg-Zn vapor mixture in a quartz cell. The decays of these states gave rise to UV bound-free and visible bound-bound fluorescence spectra which were recorded with a monochromat