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Issue 4, 2007

Coumaric amiderotaxanes: effects of hydrogen bonding and mechanical interlocking on the photochemistry and photophysics

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Abstract

Secondary amide derivatives of coumaric and ferulic acid are shown to undergo photoisomerization, forming a photostationary mixture of E- and Z-isomers. When the same chromophores are incorporated in rotaxanes, the extent of conversion to the Z-isomers is much smaller. Low temperature fluorescence experiments show that the energy barrier for non-radiative decay of the excited state is higher in the rotaxanes than in the corresponding threads, but the barriers are low in all cases.

Graphical abstract: Coumaric amide rotaxanes: effects of hydrogen bonding and mechanical interlocking on the photochemistry and photophysics

Supplementary files

Article information


Submitted
02 Jan 2007
Accepted
19 Jan 2007
First published
12 Feb 2007

Photochem. Photobiol. Sci., 2007,6, 480-486
Article type
Paper

Coumaric amide rotaxanes: effects of hydrogen bonding and mechanical interlocking on the photochemistry and photophysics

A. M. Brouwer, S. M. Fazio, N. Haraszkiewicz, D. A. Leigh and C. M. Lennon (neé Keaveney), Photochem. Photobiol. Sci., 2007, 6, 480 DOI: 10.1039/B618795A

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