Pressure dependence of acetophenone N, N, N', N'-tetramethylbenzidine exciplex in supercritical carbon dioxide

Aizawa T; Janttarakeeree S; Ikushima Y; Saitoh N

Chemical Physics Letters, Vol.354, No.3-4, 298-302, 2002

DOI10.1016/S0009-2614(02)00123-9 Export Citation

Pressure dependence of acetophenone N, N, N', N'-tetramethylbenzidine exciplex in supercritical carbon dioxide

Aizawa T, Janttarakeeree S, Ikushima Y, Saitoh N

The pressure dependence of the formation and decay processes of exciplex between two neutral species acetophenone (AP) and N,N,N',N'-tetramethylbenzidine (TMB) in supercritical carbon dioxide was investigated by a transient absorption technique at 40 degreesC and at pressures from 9.0 to 14.7 MPa. The exciplex formation rate constant could be described by the Stokes-Einstein/Debye (SE/D) equation. The trend of the exciplex decay rate constant showed local density augmentation around the exciplex in the low-pressure region. (C) 2002 Elsevier Science B.V. All rights reserved.