TY - JOUR

T1 - Fluorescene study of the state of tryptophane in aqueous dimethylsulfoxide

AU - Zhukovskii, A. P.

AU - Bakulev, V. M.

AU - Zhukovskii, M. A.

AU - Rovnov, N. V.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The fluorescence spectra of tryptophane were measured in a wide range of concentrations of aqueous dimethylsulfoxide (DMSO) solutions. In solutions with different compositions, tryptophane is surrounded by water molecules alone. This result is in agreement with the known fact of microseparatton of aqueous DMSO solutions. Evidently, in a water-DMSO system, the tryptophane molecules are built into water microregions, in which they have a pure aqueous environment and are thus isolated from the nonelectrolyte present in the solution. Based on the experimental data, we determined induced relaxation time of water molecules forming the nearest environment of excited tryptophane (0.59 ns for aqueous tryptophane).

AB - The fluorescence spectra of tryptophane were measured in a wide range of concentrations of aqueous dimethylsulfoxide (DMSO) solutions. In solutions with different compositions, tryptophane is surrounded by water molecules alone. This result is in agreement with the known fact of microseparatton of aqueous DMSO solutions. Evidently, in a water-DMSO system, the tryptophane molecules are built into water microregions, in which they have a pure aqueous environment and are thus isolated from the nonelectrolyte present in the solution. Based on the experimental data, we determined induced relaxation time of water molecules forming the nearest environment of excited tryptophane (0.59 ns for aqueous tryptophane).

UR - http://www.scopus.com/inward/record.url?scp=27544485413&partnerID=8YFLogxK

U2 - 10.1007/BF02768810

DO - 10.1007/BF02768810

M3 - Article

AN - SCOPUS:27544485413

VL - 38

SP - 78

EP - 82

JO - Journal of Structural Chemistry

JF - Journal of Structural Chemistry

SN - 0022-4766

IS - 1

ER -