RAMAN PHONON-SPECTRA AND LATTICE-DYNAMICS OF 7-METHOXYCOUMARIN UNDER PRESSURE

被引：1
作者：
BRILLANTE, A
DELLAVALLE, RG
VENUTI, E
机构：
[1] Dipartimento di Chimica Fisica e Inorganica, Università di Bologna, 40136 Bologna
来源：
CHEMICAL PHYSICS LETTERS | 1995年 / 246卷 / 06期
关键词：
D O I：
10.1016/0009-2614(95)01148-1
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Raman phonon spectra of 7-methoxycoumarin in the lattice phonon region have been measured in the range 0-5 GPa. A model atom-atom Buckingham potential has been determined to calculate structural parameters and Raman-active lattice phonons at ambient conditions and under pressure up to 14 GPa. The agreement with experiment is satisfactory. Results are discussed with reference to the mechanism of the non-topochemical photodimerization which is confirmed to occur via defect sites of the crystal rather than as a phonon-assisted process.
引用
收藏
页码：619 / 625
页数：7
相关论文
共 24 条
[1]   TOPOCHEMICAL DIMERIZATION OF NON-PARALLEL DOUBLE-BONDS - 7-METHOXYCOUMARIN [J].
BHADBHADE, MM ;
MURTHY, GS ;
VENKATESAN, K ;
RAMAMURTHY, V .
CHEMICAL PHYSICS LETTERS, 1984, 109 (03) :259-263
[2]  
BINI R, COMMUNICATION
[3]   PRESSURE-INDUCED PHASE-TRANSITIONS IN 9,10-ANTHRACENE DERIVATIVES - ANTHRAQUINONE [J].
BRILLANTE, A ;
DELLAVALLE, RG ;
FARINA, R ;
VENUTI, E .
CHEMICAL PHYSICS, 1995, 191 (1-3) :177-184
[4]   THE EFFECT OF PRESSURE ON THE EXCIMER LUMINESCENCE OF 9-CYANOANTHRACENE [J].
BRILLANTE, A ;
HANFLAND, M ;
SYASSEN, K .
CHEMICAL PHYSICS LETTERS, 1985, 119 (01) :42-46
[5]   THE EFFECT OF PRESSURE ON THE PHOTODIMERIZATION OF 7-METHOXYCOUMARIN CRYSTAL [J].
BRILLANTE, A ;
CAU, M ;
DELLAVALLE, RG ;
VENUTI, E .
CHEMICAL PHYSICS LETTERS, 1994, 218 (5-6) :568-573
[6]   LATTICE PHONON MEDIATION OF SOLID-STATE PHOTOREACTION IN 7-METHOXYCOUMARIN CRYSTAL - LASER RAMAN-SPECTROSCOPIC STUDY [J].
CHAKRABARTI, S ;
GANTAIT, M ;
MISRA, TN .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1991, 60 (03) :271-278
[7]   TOPOCHEMISTRY .1. SURVEY [J].
COHEN, MD ;
SCHMIDT, GMJ .
JOURNAL OF THE CHEMICAL SOCIETY, 1964, (JUN) :1996-+
[8]   TOPOCHEMISTRY .2. PHOTOCHEMISTRY OF TRANS-CINNAMIC ACIDS [J].
COHEN, MD ;
SCHMIDT, GMJ ;
SONNTAG, FI .
JOURNAL OF THE CHEMICAL SOCIETY, 1964, (JUN) :2000-&
[9]  
Craig D. P., 1982, J PROC R SOC N S, V115, P61
[10]  
CRAIG DP, 1966, J CHEM SOC CHEM COMM, P742
123