Spin coherence in photoexcited triplet-state benzophenone and benzil at 77 K: optically detected driven echoes
β Scribed by A.M. Ponte Goncalves; R. Gillies
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 372 KB
- Volume
- 94
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Optically detected driven echoes were used to measure spin coherence times at 77 K for triplet-state benzophenone in dlbromodlpllen~lctlIcr host crystals (T2+, = 4.2 + 0.5 gs) and for triplet X-traps in neat benzil crystals (T=, = 3-O f 0.2 us)_
π SIMILAR VOLUMES
Benzophenone forms a weak complex with diethylaniline in the ground state at 77 K. Laser photolysis studies carried out for a neat diethylaniline solution of benzophenone at 77 K reveal that the excited triplet state of the weak complex has a strong charge-transfer structure and exhibits a transient
Electron spin echo envelope modulation (ESEEM) has been stud- imposed (3, 4). Since commercial pulsed EPR spectromeied at zero and low magnetic fields (B Β°100 G) by means of ters normally operate at X-band frequencies (8-10 GHz), optically detected magnetic resonance. Qualitative differences of the