Fluorescence spectra of DODCI photoisomer, created by laser microsecond and picosecond excitation, have been recorded. The fluorescence lifetimes of the normal and photoisomer forms of this mode-locking dye have been measured directly with a picosecond streak camera and shown to both have the same v
Picosecond flash photolysis and spectroscopy: 3,3′-diethyloxadicarbocyanine iodide (DODCI)
✍ Scribed by Douglas Magde; Maurice W. Windsor
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 833 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
We dcmonstratc transient absorption spectroscopy with picosecond time resolution and nanomctcr spectral rcsolution over the entire visible region. To resolve mu1 tiple discrepancies in the literature, we studied 3,3'-dicrhyloxadicarbocyanine iodide. We measured both cscited sinflct liFerime and ground sure deplaion and recovery. The kinetics of the two Processes are the same. The characteristic time is 1.15 f 0.15 nsec in ethanol and 560 + 70 pscc in waler. WC report lluorcscence yield dererminntions and comment on the controversy over photoisomer generation.
📜 SIMILAR VOLUMES
We have mextsured, by fluorescence, the relaxation times of the excited stales of the two DODCI isomers in solution irr ethanol. Excitation with a single pulse gives orlli the excited state of the normal form with Tf= (1.2 f 0.3)1x Excitation with a train of pulses leads to build-up of the photoisom
The transient absorption sjicctrum Of an electro&Aly excited dithiene; bis\_i4d~ethyl~inodi~~ObemiI)-~i~[), which we term BDN, 1~~s measured with 10 ps temporal resolution and I: nm wavcIength resolution. For liseries oE "heavy atom" solvents, both the ground state and the excited state spectra rem