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Titolo:
Solvent viscosity and interrelated effects on electrochemiluminescence intensity of tris(2,2 '-bipyridyl)ruthenium(II)
Autore:
Scott, AM; Pyati, R;
Indirizzi:
Univ Colorado, Dept Chem, Colorado Springs, CO 80933 USA Univ Colorado Colorado Springs CO USA 80933 olorado Springs, CO 80933 USA
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 37, volume: 105, anno: 2001,
pagine: 9011 - 9015
SICI:
1520-6106(20010920)105:37<9011:SVAIEO>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRON-TRANSFER REACTIONS; HIGH-FREQUENCY GENERATION; ELECTROGENERATED CHEMILUMINESCENCE; CONCENTRATION GRADIENTS; MICRODISK ELECTRODES; CHEMI-LUMINESCENCE; AQUEOUS-SOLUTIONS; RATE CONSTANTS; KINETICS; RUTHENIUM(II);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Pyati, R Univ Colorado, Dept Chem, Colorado Springs, CO 80933 USA Univ Colorado Colorado Springs CO USA 80933 prings, CO 80933 USA
Citazione:
A.M. Scott e R. Pyati, "Solvent viscosity and interrelated effects on electrochemiluminescence intensity of tris(2,2 '-bipyridyl)ruthenium(II)", J PHYS CH B, 105(37), 2001, pp. 9011-9015

Abstract

We report the electrochemiluminescence (ECL) intensity of tris(2,2 ' -bipyridyl)ruthenium(II) [Ru(bpy)(3)(2+)] as a function of varying solution viscosity in mixtures of N,N-dimethylformamide and glycerin. Diffusion coefficient (D), electron-transfer rate (k) of Ru(bpy)(3)(2+/3+),and luminescence intensity are measured and correlated with viscosity and ECL intensity (I-ecl). I-ecl decreases with increasing solution viscosity and tracks diffusionand electron transfer until it reaches an upper limit. This limit is reached at D = 5 x 10(-7) cm(2)/s and k = 0.03 cm/s in this system. Normalizing I-ecl for diffusion reveals a weak enhancement of ECL with increasing viscosity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 09:27:29