Journal of the Chemical Society - Faraday Transactions p. 2761 - 2766 (1995)
Update date:2022-08-11
Topics:
Tung, Chen-Ho
Ji, Hai-Feng
The emission spectra and photodimerization of fluorinated alkyl 2-naphthoates (NpFCn) and 9-anthrylmethyl perfluoroalkanoates (AnFCn) in aqueous-organic binary solvents have been investigated.The fluorescence spectra of NpFCn in dimethyl sulfoxide-water (DMSO-H2O) are dominated by excimer emission.Addition of long chain fluorocarbon compounds to the solution results in a reduction in the excimer emission and an enhancement of monomer emission.Selective excitation of the naphthalene moiety in the mixture solution of NpFCn and AnFCn leads to strong emission from AnFCn.Photoirradiation of NpFCn yields a 'cubane-like' photodimer with a relatively high quantum yield.All these observations suggest that hydrophobic interactions force molecules with long fluorocarbon chains to form aggregates in aqueous-organic binary solvents.
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