DYNAMICS OF EXCITED-STATE INTRAMOLECULAR PROTON-TRANSFER REACTIONS IN PIROXICAM - ROLE OF TRIPLET-STATES

被引：20

作者：

CHO, DW ^{[1
]}

KIM, YH ^{[1
]}

YOON, MJ ^{[1
]}

JEOUNG, SC ^{[1
]}

KIM, DH ^{[1
]}

机构：

[1] KOREA RES INST STAND & SCI,SPECT LAB,TAEJON 305606,SOUTH KOREA

来源：

CHEMICAL PHYSICS LETTERS | 1994年 / 226卷 / 3-4期

关键词：

D O I：

10.1016/0009-2614(94)00742-X

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：

The picosecond time-resolved fluorescence and transient absorption behavior of piroxicam at room temperature are reported. The keto tautomer in the excited singlet state (1K*) formed via the fast intramolecular proton transfer (almost-equal-to 20 ps) is observed. The short-lived (7.5 ns) triplet state of keto tauomer (3K*) is generated from 1K* in toluene whereas it is hardly observed in ethanol. Consequently, rapid reverse proton transfer takes place from 3K* to the enol triplet state (3E*).

引用

页码：275 / 280

页数：6

共 22 条

[1] PICOSECOND KINETIC AND VIBRATIONALLY RESOLVED SPECTROSCOPIC STUDIES OF INTRAMOLECULAR EXCITED-STATE HYDROGEN-ATOM TRANSFER [J].

BARBARA, PF ;

WALSH, PK ;

BRUS, LE .

JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (01) :29-34

[2] PHOTOCHEMICAL AND PHOTOPHYSICAL PROPERTIES OF PIROXICAM AND BENOXAPROFEN IN VARIOUS SOLVENTS [J].

BECKER, RS ;

CHAKRAVORTI, S ;

YOON, MJ .

PHOTOCHEMISTRY AND PHOTOBIOLOGY, 1990, 51 (02) :151-154

[3] CUTANEOUS REACTIONS TO NONSTEROIDAL ANTI-INFLAMMATORY DRUGS - A REVIEW [J].

BIGBY, M ;

STERN, R .

JOURNAL OF THE AMERICAN ACADEMY OF DERMATOLOGY, 1985, 12 (05) :866-876

[4] PROTON-TRANSFER AND SOLVENT POLARIZATION DYNAMICS IN 3-HYDROXYFLAVONE [J].

BRUCKER, GA ;

SWINNEY, TC ;

KELLEY, DF .

JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (08) :3190-3195

[5] ROLE OF PHENYL TORSION IN THE EXCITED-STATE DYNAMICS OF 3-HYDROXYFLAVONE [J].

BRUCKER, GA ;

KELLEY, DF .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (13) :3805-3809

[6] CYCLODEXTRIN EFFECTS ON EXCITED-STATE GEOMETRY CHANGE AND INTRAMOLECULAR CHARGE-TRANSFER OF 4-BIPHENYLCARBOXYLIC ACID [J].

CHO, DW ;

KIM, YH ;

KANG, SG ;

YOON, MJ ;

KIM, DH .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (02) :558-562

[7] THE ROLE OF THE CIS-KETO TRIPLET-STATE IN THE PROTON-TRANSFER CYCLE OF 2-(2'-HYDROXYPHENYL) BENZOTHIAZOLE [J].

CHOU, PT ;

MARTINEZ, ML ;

STUDER, SL .

CHEMICAL PHYSICS LETTERS, 1992, 195 (5-6) :586-590

[8] ROLE OF TRIPLET-STATES IN THE REVERSE PROTON-TRANSFER MECHANISM OF 7-HYDROXY-1-INDANONE [J].

CHOU, PT ;

MARTINEZ, ML ;

STUDER, SL .

JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (25) :10306-10310

[9] PROTON-TRANSFER AND HYDROGEN-BONDING IN THE INTERNAL-CONVERSION OF S-1 ANTHRAQUINONES [J].

FLOM, SR ;

BARBARA, PF .

JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (21) :4489-4494

[10] EXCITED-STATE PROTON-TRANSFER REACTIONS .2. INTRAMOLECULAR REACTIONS [J].

FORMOSINHO, SJ ;

ARNAUT, LG .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1993, 75 (01) :21-48

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