131833-64-2Relevant academic research and scientific papers
A Comparsion between Zeolite-Solvent Slurry and Dry Solid Photolyses
Ramamurthy, V.,Corbin, D. R.,Turro, N. J.,Zhang, Z.,Garcia-Garibay, M. A.
, p. 255 - 261 (2007/10/02)
The use of zeolite-solvent slurry as a convenient medium to carry out photoreactions is illustrated with four examples, namely Norrish type I reaction of dibenzyl ketones, Norrish type I and type II reactions of α-alkylbenzyl benzyl ketones, Norrish type II reaction of aryl alkyl ketones, and photodimerization of acenaphthylene.Solvent present within the supercages of zeolites X and Y provides constraint on the mobility of the included guest molecules.Such restrictions are reflected in the product distributions.The difference in the product distribution obtained between the zeolite-solvent slurry and a homogeneous solution is often higher than that between the dry powder zeolites and a homogeneous solution.
Norrish Type I and Type II Reactions of Ketones as Photochemical Probes of the Interior of Zeolites
Ramamurthy, V.,Corbin, D. R.,Eaton, D. F.
, p. 5269 - 5278 (2007/10/02)
The Norrish type I and type II reactions of alkylbenzoin ethers, alkyldeoxybenzoins and α-alkyldibenzyl ketones included within the microporous structures of zeolites X and Y have been investigated.Product distributions varied significantly from that observed in benzene.In addition, it differed between various alkali-metal cation-exchanged samples.These variations are interpreted to result from the restriction offered by the zeolite micropores on the motions of the adsorbed organic molecule.Although this study is restricted to ketones, the knowledge gained is expected to be of general value.
MODIFICATION OF PHOTOCHEMICAL REACTIVITY BY ZEOLITES: ROLE OF CATIONS IN CONTROLLING THE BEHAVIOR OF RADICALS GENERATED WITHIN FAUJASITES.
Ramamurthy, V.,Corbin, D. R.,Eaton, D. F.,Turro, N. J.
, p. 5833 - 5836 (2007/10/02)
α-Alkyldibenzylketones included in cation exchanged faujasite type zeolites show photobehavior different from that in isotropic organic solvents.Rearrangement and disproportionation which do not contribute in solution are the major processes within the cavities of faujasites.Cation size plays a major role in controlling the pathway pursued by the primary and the secondary radical pair.
Modification of Photochemical Reactivity by Cyclodextrin Complexation: A Remarkable Effect on the Photobehavior of α-Alkyldibenzyl Ketones
Nageshwer Rao, B.,Syamala, M. S.,Turro, N. J.,Ramamurthy, V.
, p. 5517 - 5521 (2007/10/02)
The Norrish type I and type II reactions of cyclodextrin-included α-alkyldibenzyl ketones have been investigated in the aqueous solution and in the solid state.The photolysis of solid cyclodextrin complexes led to a single product, diphenylethane (AB), and that of complexes in the aqueous solution resulted in a product arising from the rerrangement of α-alkyldibenzyl ketones.Conformational and super-cage effects are proposed to be responsible for the dramatic alteration observed in the above photobehavior.The difference in the product distribution between solid and solution complexes is attributed to the differences in the restriction imposed by the host on the translational motions of the geminate radical pairs.
