Solvent viscosity and interrelated effects on electrochemiluminescence intensity of tris(2,2′-bipyridyl)ruthenium(II)

Amy M. Scott; Radha Pyati

doi:10.1021/jp0112323

Solvent viscosity and interrelated effects on electrochemiluminescence intensity of tris(2,2′-bipyridyl)ruthenium(II)

Amy M. Scott, Radha Pyati

Chemistry

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17 Scopus citations

Abstract

We report the electrochemiluminescence (ECL) intensity of tris(2,2′-bipyridyl)ruthenium(II) [Ru(bpy)₃²⁺] 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 diffusion and electron transfer until it reaches an upper limit. This limit is reached at D = 5 × 10^-7 cm²/s and k = 0.03 cm/s in this system. Normalizing I_ecl for diffusion reveals a weak enhancement of ECL with increasing viscosity.

Original language	English (US)
Pages (from-to)	9011-9015
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	105
Issue number	37
DOIs	https://doi.org/10.1021/jp0112323
State	Published - Sep 20 2001

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ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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Scott, A. M., & Pyati, R. (2001). Solvent viscosity and interrelated effects on electrochemiluminescence intensity of tris(2,2′-bipyridyl)ruthenium(II). Journal of Physical Chemistry B, 105(37), 9011-9015. https://doi.org/10.1021/jp0112323

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abstract = "We report the electrochemiluminescence (ECL) intensity of tris(2,2′-bipyridyl)ruthenium(II) [Ru(bpy)32+] 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)32+/3+, and luminescence intensity are measured and correlated with viscosity and ECL intensity (Iecl). Iecl decreases with increasing solution viscosity and tracks diffusion and electron transfer until it reaches an upper limit. This limit is reached at D = 5 × 10-7 cm2/s and k = 0.03 cm/s in this system. Normalizing Iecl for diffusion reveals a weak enhancement of ECL with increasing viscosity.",

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AB - We report the electrochemiluminescence (ECL) intensity of tris(2,2′-bipyridyl)ruthenium(II) [Ru(bpy)32+] 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)32+/3+, and luminescence intensity are measured and correlated with viscosity and ECL intensity (Iecl). Iecl decreases with increasing solution viscosity and tracks diffusion and electron transfer until it reaches an upper limit. This limit is reached at D = 5 × 10-7 cm2/s and k = 0.03 cm/s in this system. Normalizing Iecl for diffusion reveals a weak enhancement of ECL with increasing viscosity.

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10.1021/jp0112323