Preferential solvation studied by the fluorescence lifetime of acridine in water–alcohol mixtures

Autor:	Osamu Ito, Yuko Yoshikawa, Eiko Ito, Hiroshi Kokubun, Akira Watanabe
Rok vydání:	1996
Předmět:	Solvent Hydrophobic effect chemistry.chemical_compound Ethanol chemistry Acridine Solvation Alcohol Methanol Physical and Theoretical Chemistry Photochemistry Mole fraction
Zdroj:	J. Chem. Soc., Faraday Trans.. 92:227-230
ISSN:	1364-5455 0956-5000
DOI:	10.1039/ft9969200227
Popis:	Fluorescence lifetimes (τF) of acridine have been measured in water–alcohol solvent mixtures at room temperature. The τF of acridine in pure water (11.5 ± 0.1 ns) was drastically decreased upon the addition of small amounts of alcohol; i.e.τF= 1.2 ± 0.01 ns in 0.5 mole fraction of ethanol in water and τF= 0.4 ± 0.01 ns in pure ethanol. The extent of the decrease in τF becomes more evident in the following order: methanol < ethanol < propan-1-ol. This is the order of increasing hydrophobic interaction between alcohols and acridine, suggesting that alcohol molecules preferentially solvate acridine in water. Such an observation has been discussed in terms of the degree of preferential solvation.
Databáze:	OpenAIRE
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