Triplet photochemistry within zeolites through heavy atom effect, sensitization and light atom effect
作者:K Pitchumani、M Warrier、Lakshmi S Kaanumalle、V Ramamurthy
DOI:10.1016/s0040-4020(03)00865-2
日期:2003.7
rearrangement of barrelenes, oxa-di-π-methane rearrangement of β,γ-unsaturated ketones and photodimerization of acenaphthylene as probe reactions. The two methods, heavy cation effect and triplet sensitization, are well established solution techniques and these work well within zeolites. The Zimmerman rearrangement of dibenzobarrelene is enhanced even within Li+ and Na+ exchanged zeolites and these are
Acyltetracarbonylferracycles obtained from strainedmolecules and iron carbonyls on oxidative treatment with CuCl2 afford α-diketones exclusively in good yields.
Effective control of regioselectivity by a bridgehead substituent in the di-.pi.-methane rearrangement of dibenzobarrelenes and benzonorbornadienes
作者:Leo A. Paquette、Elliott Bay
DOI:10.1021/ja00334a039
日期:1984.10
Photoisomerisation via l'etat triplet de huit benzonorbornadienes monosubstitues et de deux benzobarrelenes isotopiquement substitues. L'analyse de l'effet substituant conduit a la proposition de deux mecanismes
通过 l'etat 三重态苯并降冰片二烯单取代基和 deux benzobarrelenes isotopiquement 取代基进行光异构化。L'analysis de l'effet substituant pipe a la proposal de deux mecanismes
Novel approaches towards the generation of excited triplets of organic guest molecules with zeolites
作者:Kasi Pitchumani、Manoj Warrier、V. Ramamurthy、Manoj Warrier、John R. Scheffer
DOI:10.1039/a708013a
日期:——
Alkali metal cation-exchanged zeolites (M+X or M+Y) can be used as ‘microreactors’ in which to carry out photochemical rearrangement reactions of organic guests.
碱金属阳离子交换沸石(M+X 或 M+Y)可用作“微反应器”,在其中进行有机客体的光化学重排反应。
Photochemical transformations. 33. Some studies of the photorearrangements of dibenzobarrelenes. A novel excitation-transfer relay mechanism
作者:Stanley J. Cristol、Russell L. Kaufman、Sumittada Malasanta Opitz、Wojciech Szalecki、Thomas H. Bindel
DOI:10.1021/ja00348a044
日期:1983.5
The regioselectivity of the di-..pi..-methane rearrangements did not vary with sensitizer, although the quantum yields did. The lack of depedence of product ratio upon sensitizer suggests that the product-determining step occurs after excitation transfer, rather than during it or in an exciplex containing tripletsensitizer and reactant.