Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 108, Issue 25, Pages 8668-8672Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp0370674
Keywords
-
Categories
Ask authors/readers for more resources
Photophysical properties of a series of tetramethylrosamine dyes in which the xanthylium oxygen atom has been replaced with sulfur or selenium were examined. Dyes with sulfur and, especially, with selenium show decreased fluorescence quantum yield and lifetimes, while at the same time proportionally larger increases in the rates of intersystem crossing lead to higher triplet yields (0.23 and 0.97, correspondingly). The selenium-containing dye (TMR-Se) displays prominent phosphorescence at 77 K and at room temperature when the solution is purged of oxygen. This is reflected in a high yield for singlet oxygen generation as shown by measurements of singlet oxygen phosphorescence. The high singlet oxygen yield for TMR-Se (0.87) suggests its use as an efficient photosensitizer for the generation of singlet oxygen in biology and chemistry applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available