TY - JOUR
T1 - Coumaric amide rotaxanes
T2 - Effects of hydrogen bonding and mechanical interlocking on the photochemistry and photophysics
AU - Brouwer, Albert M.
AU - Fazio, Sandro M.
AU - Haraszkiewicz, Natalia
AU - Leigh, David A.
AU - Lennon (neé Keaveney), Claire M.
PY - 2007/4/2
Y1 - 2007/4/2
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=34047227172&partnerID=8YFLogxK
U2 - 10.1039/b618795a
DO - 10.1039/b618795a
M3 - Article
C2 - 17404644
SN - 1474-905X
VL - 6
SP - 480
EP - 486
JO - Photochemical and Photobiological Sciences
JF - Photochemical and Photobiological Sciences
IS - 4
ER -