REVERSIBLE EXCITED-STATE TRANSIENT SOLVATION IN BINARY SUPERCRITICAL FLUIDS REVEALED BY MULTIFREQUENCY PHASE AND MODULATION FLUORESCENCE

被引：44

作者：

BETTS, TA ^{[1
]}

BRIGHT, FV ^{[1
]}

机构：

[1] SUNY BUFFALO, DEPT CHEM, BUFFALO, NY 14260 USA

来源：

APPLIED SPECTROSCOPY | 1990年 / 44卷 / 07期

关键词：

D O I：

10.1366/0003702904086551

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Frequency-domain fluorescence spectroscopy is used to study the transient solvation of 4-amino-N-methylphthalimide (4AMP) in binary supercritical fluids composed of 2-propanol and CO2. The time-resolved emission spectra are constructed for this system with the use of the wavelength-dependent frequency-domain data. Analysis of the experimental data indicates that: (1) 4AMP is pre-associated with 2-propanol prior to excitation; (2) the 2-propanol-induced spectral relaxation occurs on a nanosecond time scale; and (3) the excited-state reaction between 4AMP and 2-propanol is reversible.

引用

页码：1203 / 1209

页数：7

共 66 条

[1] FEMTOSECOND RELAXATION DYNAMICS IN THE ELECTRONIC GROUND-STATE OF DYE MOLECULES STUDIED BY POLARIZATION-DEPENDENT AMPLIFICATION SPECTROSCOPY [J].