Enantiodifferentiating photoaddition of alcohols to 1,1-diphenylpropene in supercritical carbon dioxide: sudden jump of optical yield at the critical density.
In the enantiodifferentiating photoaddition of ROH (R = Me, Et, i-Pr) to 1,1-diphenylpropene sensitized by fructosyl 1,4-naphthalenedicarboxylate in supercritical carbon dioxide, the enantiomeric excess of photoadduct increased with increasing bulkiness of the alcohol at all pressures used, with an accompanying sudden jump at the critical density, for which the enhanced clustering of alcohol, particularly in the subcritical pressure region, was revealed to be responsible from the fluorescence spectral examinations.
Nishiyama
Yasuhiro
Y
Department of Molecular Chemistry and PRESTO (JST), Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan.
Kaneda
Masayuki
M
Saito
Ryota
R
Mori
Tadashi
T
Wada
Takehiko
T
Inoue
Yoshihisa
Y