Solvent dynamical effects on the electron self-exchange rate of the TEMPO•/TEMPO+ couple (TEMPO=2,2,6,6-tetramethyl-1-piperidinyloxy radical) -: Part 1.: ESR-linebroadening measurements at T=298 K

被引：55

作者：

Grampp, G ^{[1
]}

Rasmussen, K ^{[1
]}

机构：

[1] Graz Univ Technol, Inst Phys & Theoret Chem, A-8010 Graz, Austria

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2002年 / 4卷 / 22期

关键词：

D O I：

10.1039/b206313a

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：

Rate constants of the electron self-exchange for the TEMPO./TEMPO+ couple were measured in acetonitrile, benzonitrile, deuterium oxide, propylene carbonate, THF and water at T = 298 K. The experimental rate constants cover a range of 0.88 x 10(8) less than or equal to k(et) less than or equal to 5.0 x 10(8) M-1 s(-1) and clearly show a solvent dynamical "friction" effect controlled by the longitudinal relaxation time of the solvent tau(L).

引用

页码：5546 / 5549

页数：4

共 42 条

[1] Interplay between ultrafast polar solvation and vibrational dynamics in electron transfer reactions: Role of high-frequency vibrational modes [J].

Bagchi, B ;

Gayathri, N .

ELECTRON TRANSFER-FROM ISOLATED MOLECULES TO BIOMOLECULES, PT 2, 1999, 107 :1-80

[2] DIELECTRIC SPECTRA OF SOME COMMON SOLVENTS IN THE MICROWAVE REGION - WATER AND LOWER ALCOHOLS [J].

BARTHEL, J ;

BACHHUBER, K ;

BUCHNER, R ;

HETZENAUER, H .

CHEMICAL PHYSICS LETTERS, 1990, 165 (04) :369-373

[3] HIGH-FREQUENCY PERMITTIVITY AND ITS USE IN THE INVESTIGATION OF SOLUTION PROPERTIES [J].

BARTHEL, J ;

BUCHNER, R .

PURE AND APPLIED CHEMISTRY, 1991, 63 (10) :1473-1482

[4] Electron transfer - From isolated molecules to biomolecules [J].

Bixon, M ;

Jortner, J .

ELECTRON TRANSFER-FROM ISOLATED MOLECULES TO BIOMOLECULES, PT 1, 1999, 106 :35-202

[5] SOLVENT RELAXATION DYNAMICS AND ELECTRON-TRANSFER [J].

BIXON, M ;

JORTNER, J .

CHEMICAL PHYSICS, 1993, 176 (2-3) :467-481

[6] CLASSICAL SOLVENT DYNAMICS AND ELECTRON-TRANSFER .1. CONTINUUM THEORY [J].

CALEF, DF ;

WOLYNES, PG .

JOURNAL OF PHYSICAL CHEMISTRY, 1983, 87 (18) :3387-3400

[7] QUANTUM-MECHANICAL TUNNELLING IN BIOLOGICAL-SYSTEMS [J].

DEVAULT, D .

QUARTERLY REVIEWS OF BIOPHYSICS, 1980, 13 (04) :387-564

[8] ROLE OF VIBRATIONAL-EXCITATION IN ELECTRON-TRANSFER REACTIONS WITH LARGE NEGATIVE FREE-ENERGIES [J].

EFRIMA, S ;

BIXON, M .

CHEMICAL PHYSICS LETTERS, 1974, 25 (01) :34-37

[9] Magnetic field effects on the pyrene-dicyanobenzene system: determination of electron self-exchange rates by MARY spectroscopy [J].

Grampp, G ;

Justinek, M ;

Landgraf, S .

MOLECULAR PHYSICS, 2002, 100 (08) :1063-1070

[10] Intermolecular electron self exchange kinetics measured by electron paramagnetic resonance linebroadening effects: useful rate constants for the application of Marcus theory [J].

Grampp, G .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1998, 54 (14) :2349-2358

← 1 2 3 4 5 →