Supramolecular photocatalysis by confinement--photodimerization of coumarins within cucurbit[8]urils.
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.
Pemberton
Barry C
BC
Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, ND 58105, USA.
Barooah
Nilotpal
N
Srivatsava
D K
DK
Sivaguru
J
J
D001952:Bridged-Ring Compounds / Q000737:chemistry*; D002384:Catalysis; D003374:Coumarins / Q000737:chemistry*; D019281:Dimerization; D007093:Imidazoles / Q000737:chemistry*; D007700:Kinetics; D036103:Nanotechnology; D055668:Photochemical Processes; D014867:Water / Q000737:chemistry; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils
D001952:Bridged-Ring Compounds; D003374:Coumarins; D007093:Imidazoles; D014867:Water; C507198:cucurbit(8)uril; D047028:Macrocyclic Compounds; D000099246:Cucurbit(n)urils; C018096:6-methylcoumarin