Inclusion complexes between amphiphilic molecules and carboxymethylamylose in aqueous solution: ketone type II photoelimination behavior as a probe of the guest microenvironment
This paper reports a study of complex formation between two amphiphilic ketones and carboxymethylamylose and the photoreactiviy of the ketones in their respective inclusion complexes. The binding constants are found to increase as the chain length of the linear ketone (n in PhCO(CH/sub 2/)/sub n/COOH equals 3 and 10) increases. The CMA-included ketone is found to exhibit relatively low quantum efficiencies for the type II photoelimination process, the only reaction observed in each case. The results suggest that the ketone environment in the amylose cavities is relatively hydrophobic and conformationally restrictive; the photochemical reactivity observed is similar to that occurring for related ketones incorporated into bilayer vesicles below the phase transition temperature.
- Research Organization:
- Univ. of North Carolina, Chapel Hill
- DOE Contract Number:
- AS05-81ER10815
- OSTI ID:
- 6163922
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 87:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CLATHRATES
CHEMICAL PREPARATION
DEHYDROGENATION
MOLECULAR STRUCTURE
PHOTOCHEMICAL REACTIONS
KETO ACIDS
AROMATICS
CARBONIC ACID ESTERS
COMPARATIVE EVALUATIONS
EQUATIONS
METHANOL
QUANTITY RATIO
QUANTUM EFFICIENCY
REACTION KINETICS
STARCH
ALCOHOLS
CARBOHYDRATES
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
EFFICIENCY
ESTERS
HYDROXY COMPOUNDS
KINETICS
ORGANIC ACIDS
ORGANIC COMPOUNDS
POLYSACCHARIDES
REAGENTS
SACCHARIDES
SYNTHESIS
400500* - Photochemistry