Quenching and quenching reversal of tris(2,2'-bipyridine)ruthenium(II) emission in polyelectrolyte solutions

Journal Article · Wed Sep 28 04:00:00 EDT 1977 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00462a018· OSTI ID:7288243

Meisel, D; Matheson, M S

The emission from the lowest charge transfer excited state of Ru(bpy)/sub 3//sup 2 +/ is very efficiently quenched by low concentrations of Cu/sup 2 +/ ions when polyvinylsulfate (PVS) is present in the solution. Stern--Volmer constants 2 x 10/sup 3/ higher than in the absence of PVS can be easily obtained. This efficient quenching completely vanishes and the emission is nearly totally restored when higher concentrations of the same quencher, or of inert cations, are added. The efficient quenching results from Cu/sup 2 +/ and Ru(bpy)/sub 3//sup 2 +/ residing in the potential field of the same polymer. However, as soon as the quencher (or the inert cation) displaces Ru(bpy)/sub 3//sup 2 +/ from the polyelectrolyte, quenching reversal is observed. Quantitative results regarding the number of available sites and the relative binding constants of Cu/sup 2 +/ and Ru(bpy)/sub 3//sup 2 +/ can be deduced from the minima and the quenching reversal portions of the quenching curves. Possible utilization of this or similar systems in solar energy conversion and storage is indicated.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 7288243
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 99:20; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ABSORPTION SPECTRA
AZINES
CHARGE EXCHANGE
COMPLEXES
EMISSION SPECTRA
ENERGY LEVELS
ESTERS
EXCITED STATES
HETEROCYCLIC COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYVINYLS
PYRIDINES
RUTHENIUM COMPLEXES
SPECTRA
SULFURIC ACID ESTERS
TRANSITION ELEMENT COMPLEXES