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(More) About biphenyl first excited triplet state energy

Paper ID Volume ID Publish Year Pages File Format Full-Text
28600 44081 2006 6 PDF Available
Title
(More) About biphenyl first excited triplet state energy
Abstract

Biphenyl photophysics was extensively studied in the past and much attention was given to the measurement of its first excited triplet state energy. Phosphorescence and the corresponding T1 ← S0 absorption give triplet energies that differ by 10 kcal mol−1. We revisited biphenyl photophysics using photoacoustic calorimetry (PAC), a technique that directly measures the thermochemistry and kinetics of short-lived transients in solution. PAC measurements give the relaxed biphenyl triplet energy of 67.8 ± 0.6 kcal mol−1; 2.3 kcal mol−1 higher than the spectroscopic value. The direct measurement of the biphenyl relaxed triplet energy reported in this work should resolve the continued misuse of its spectroscopic energy, in particular in the growing field of polyphenylene polymers.

Keywords
Photoacoustic calorimetry; Triplet energy; Biphenyl; Energy transfer
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(More) About biphenyl first excited triplet state energy
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 184, Issues 1–2, 15 November 2006, Pages 228–233
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering