Unexpected solvent isotope effect on the triplet lifetime of methylene blue associated to cucurbit[7]uril.
Methylene blue shows an isotope dependent triplet lifetime that is 50% longer in D(2)O compared with H(2)O as a result of electronic-to-vibrational relaxation. The effect is enhanced when the dye is bound to curcubit[7]uril due to a combination of restricted mobility and a unfavorable vibrational coupling.
Department of Chemistry and Centre for Catalysis Research and Innovation, University of Ottawa, 10, Marie Curie, Ottawa, Ontario K1N 6N5, Canada. emilio@photo.chem.uottawa.ca
Emilio I
EI
Alarcon
María
M
González-Béjar
Pedro
P
Montes-Navajas
Hermenegildo
H
Garcia
Eduardo A
EA
Lissi
Juan C
JC
Scaiano
D001952:Bridged-Ring Compounds / Q000737:chemistry*; D017666:Deuterium Oxide / Q000737:chemistry*; D007093:Imidazoles / Q000737:chemistry*; D007554:Isotopes; D008751:Methylene Blue / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*; D013997:Time Factors; D014732:Vibration; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils
D001952:Bridged-Ring Compounds; D017666:Deuterium Oxide; D007093:Imidazoles; D007554:Isotopes; D008751:Methylene Blue; D012997:Solvents; C456276:cucurbit(7)uril; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils