Journal
INORGANIC CHEMISTRY
Volume 48, Issue 14, Pages 6501-6508Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic9003164
Keywords
-
Categories
Funding
- National Science Council
Ask authors/readers for more resources
The excited-state dynamics of heteroleptic iridium(III) complexes have been investigated using femto-nanosecond time-resolved luminescence and transient absorption spectroscopy. Two prototypical examples illustrated here are iridium (III) bis[2-(2,4-difluorophenyl)pyridinato-N,C-2'] quinaldinate (1) and iridium(III) bis[2-(2,4-difluorophenyl)pyridinato-N,C-2']-[2-(6-methylbenzoxazol-2-yl)phenolate] (2). Upon photoexcitation at, for example, 400 nm, the emission decay, monitored at the region of phosphorescence, for both 1 and 2 consists of a system response limited rise (<300 ps) and a single exponential decay. Further single wavelength as well as full spectrum of femto-picosecond transient absorption acquired in CH2Cl2 at room temperature reveals an ultrafast S-1 -> T-n intersystem crossing (<1 ps) and a rapid T-n - T-1 internal conversion/vibrational relaxation within a time period of <10 ps. The results lead us to conclude that following Franck-Condon excitation, the time scale required to populate the lowest triplet state should be <10 ps.
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