Kaanumalle, Lakshmi S. ; Nithyanandhan, Jayaraj ; Pattabiraman, Mahesh ; Jayaraman, Narayanaswamy ; Ramamurthy, V. (2004) Water-soluble dendrimers as photochemical reaction media: chemical behavior of singlet and triplet radical pairs inside dendritic reaction cavities Journal of the American Chemical Society, 126 (9). pp. 8999-9006. ISSN 0002-7863
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Official URL: http://pubs.acs.org/doi/abs/10.1021/ja049492w
Related URL: http://dx.doi.org/10.1021/ja049492w
Abstract
Water-soluble poly(alkyl aryl ether) dendrimers have been explored for their use as hosts of organic substrates in aqueous media. Prototypical photoreactions, namely, photo-Fries reaction of (a) 1-naphthyl benzoate and (b) 1-naphthyl phenyl ester and a-cleavage reaction of (a) dibenzyl ketones and (b) benzoin alkyl ethers, have been examined. We find that a dendritic microenvironment not only restricts the mobility of radical intermediates but also rigidly encapsulates the substrate, intermediates, and products from "leaking" to the bulk environment. Comparative studies of the same photoreactions in micellar media demonstrate that dendritic media offer much better constrainment than the micelles.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 55911 |
Deposited On: | 22 Aug 2011 13:15 |
Last Modified: | 22 Aug 2011 13:15 |
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