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Triplet-state spectroscopy of dipyrromethene·BF2 laser dyes

Paper ID Volume ID Publish Year Pages File Format Full-Text
28526 44080 2006 5 PDF Available
Title
Triplet-state spectroscopy of dipyrromethene·BF2 laser dyes
Abstract

The substituents at positions 2, 6 and 8 in the commercial dye PM567 have been changed and their influence on the triplet state of each dye has been studied in terms of the absorption spectra, lifetimes, quantum yields and triplet–triplet extinction coefficients. The dyes have in position 8 the groups p-acetoxypolymethylene, p-(acetoxypropyl)phenyl or p-(acetoxymethyl)polyphenylene, or in positions 2 and 6 the groups tert-butyl (commercial dye PM597) or 3′-acetoxypropyl. The triplet-state spectroscopy results nearly independent on the molecular structure for the mono- and di-substituted aliphatic derivatives. However, the 8-aryl substitution increases both the triplet absorption over the fluorescence spectral region and the triplet-state quantum yield, but reduces the triplet absorption coefficient.

Keywords
Laser dyes; Dipyrromethene; Fluorescence; Triplet-state properties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 181, Issues 2–3, 31 July 2006, Pages 142–146
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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