Supramolecular photocatalysis by confinement—photodimerization of coumarins within cucurbit[8]urils

Barry C. Pemberton; Nilotpal Barooah; D. K. Srivatsava; J. Sivaguru

doi:10.1039/B920605A

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Chemical Communications

Issue 2, 2010

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Supramolecular photocatalysis by confinement—photodimerization of coumarins within cucurbit[8]urils

Barry C. Pemberton , Nilotpal Barooah , D. K. Srivatsava and J. Sivaguru

Chem. Commun., 2010, 46, 225-227

DOI: 10.1039/B920605A
Received 06 Oct 2009, Accepted 30 Oct 2009
First published on the web 17 Nov 2009

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Abstract
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Cucurbit[8]uril (as low as 10 mol%) acts as a supramolecular catalytic nanoreaction vessel and facilitates the photodimerization of coumarins in water leading to syn dimers. Saturation kinetics shows a sigmoidal dependence with a turnover number of 3.4 min⁻¹ and a Hill constant of 1.8 indicating a co-operative mechanism in the catalytic process.

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Supplementary Info

Experimental procedures for photoreaction, characterizationof host–guest complex, ¹H NMR of photoproducts, optimized structure ofphotoproducts, kinetic measurements and Hill plots
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Chemical Communications

Supramolecular photocatalysis by confinement—photodimerization of coumarins within cucurbit[8]urils

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