Light emission from the first excited sir&et states of 9.IO-diphenyf anthr~~ent .mdp-terphcnvl in cqclohexane is measured following pulsed electron irradiation. The hicetics of e&ted state formntion nnd decay are mrwsured as ZI funcrion of scinnl-kItOr concentration. and the effects of additives det
The yield of solvent excited states in the radiolysis of cyclohexane solutions
β Scribed by J.H. Baxendale; J. Mayer
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 246 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
It is confirmed by pulse radiolysis that emitting sokent excited states are produced in the radiolysis of n-hexane, me~~yI~ycIo~e~~ne and cyclohexane, The emission is quenched by benzene and benzene emission appears. Applying Stern-Volmcr kinetics to emissions from solvent, benzene and tolucne in cyclohexane a very high energy transfer rate constant, viz., k = 2.8 X 10' r his1 set ^ 1 is obtained. The yield of the excited state of cyc?ohextane is not greater than 0.3, and it is conciuded that the major part of the excited states of other aromatics produced in cyclohesane solutions comes from ion ncutraliDtion.
π SIMILAR VOLUMES
Evolution of the absorption spectra due to uannent spec~cs produced by rhc pulse rrdrolysu of biphcnyl, pyrene, diphenylamine. and naphthalcne in cyclohcuane was measured over 50 ps to 3 ns. The mitial(50 ps) yield of triplet is only B small fraction of the ytrld (G -0.3) at 3 ns.
The lifetime of indole is shortened when benzene is added to a cyclohexane solution. A proposed mechanism is the formation of an exciplex through hydrogen bonding. The finding from the picosecond study presented here shows that the anomalous behavior of indole is not totally determined by the solven
## Abstract The vapor phase Ξ³βradiolysis of cyclohexane has been investigated as a function of pressure, from 100 to 0.5 Torr, in vessels of different dimensions. With decreasing pressure, the yield of hydrogen and substituted cyclohexanes is decreased and the formation of molecules having less tha
## Introduction Hydrogen bonds (H-bonds) are of great importance in biological systems, as they are responsible for the secondary structure of proteins and nucleic acids and are also involved in the mechanisms of enzyme catalysis. Supramolecular chemistry makes use of H-bonds in building up novel