Results 261 to 270 of about 16,957 (295)

Static and dynamic fluorescence quenching of carbazole by tropanic alkaloids

Journal of Photochemistry and Photobiology A: Chemistry, 1992
Abstract Steady state fluorescence quenching of carbazole by tropanic derivatives in cyclohexane and acetonitrile was performed. The results obtained using cyclohexane as solvent support the existence of two species in equilibrium: free and hydrogen-bonded complexed carbazole in both the ground and excited states.
E.M. Talavera, B. Quintero, J.M. Alvarez
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Instabilities of quasi-static crack patterns in quenched glass plates

Physica D: Nonlinear Phenomena, 1997
Abstract We have produced controlled quasi-static crack propagation in thin glass plates to study crack instabilities. Quasi-static fractures can exhibit drastic changes in morphology when the control parameter is varied. The thermal stress and the velocity of the crack tip depend on the temperature difference between two heat reservoirs (ΔT) and the
A. Yuse, M. Sano
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Static and Dynamic Quenching of Ru(II) Polypyridyl Excited States by Iodide

Inorganic Chemistry, 2005
The metal-to-ligand charge-transfer (MLCT) excited states of Ru(bpy)(2)(deeb)(PF(6))(2), where bpy is 2,2-bipyridine and deeb is 4,4'-(CO(2)CH(2)CH(3))(2)-2,2'-bipyridine, in dichloromethane were found to be efficiently quenched by iodide at room temperature.
Andras, Marton, Christopher C, Clark, Ramya, Srinivasan, Robert E, Freundlich, Amy A, Narducci Sarjeant, Gerald J, Meyer   +5 more
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Static structure and colloidal interactions in partially quenched quasibidimensional colloidal mixtures

Physical Review E, 1999
Partially quenched quasibidimensional colloidal suspensions are obtained by confining a bidisperse aqueous suspension of polystyrene spheres between two glass plates. The larger particles are fixed between the plates, forming a disordered bidimensional matrix of obstacles, with respect to which the colloidal suspension of the smaller species of ...
G. Cruz de León, J. L. Arauz-Lara
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Static and dynamic fluorescence quenching of a dicyanoanthracene-capped β-cyclodextrin

J. Chem. Soc., Perkin Trans. 2, 1995
Fluorescence quenching of 6A,6D(C)-(9, 10-dicyanoanthracene-2,6-disulfonyl)-β-cyclodextrin (DCA-β-CD) by several amines (1–6) has been investigated. Apparent Stern–Volmer constants, which are the sum of dynamic and static (binding) components, have been determined.
Michael F. Acquavella, Mary E. Evans, Steven W. Farraher, Cédrin J. Névoret, Christopher J. Abelt   +4 more
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Static and dynamic photoluminescence (PL) quenching of polymer:quencher systems in solutions

Synthetic Metals, 2001
Quenching of the PL from conjugated polymers in solution by charge transfer to electron acceptors was studied by PL measurements while varying the quencher concentration, the ion concentration in buffered aqueous solutions, and the temperature. For the aqueous solutions, the PL quenching was greatly enhanced by static quenching originating from the ...
J. Wang, D. Wang, E.K. Miller, D. Moses, A.J. Heeger   +4 more
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Static fluorescence quenching in the study of micellar systems

2007
The effect of a number of polar and non-polar organic molecules on the micelli- zation of sodium dodecyl sulfate at low suffactant and additive concentration, has been studied by fluorescence probing methods. The solubilization and its effect on micellar parameters and structure is examined and some general trends are discussed.
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Static and dynamic fluorescence quenching experiments for the physical chemistry laboratory

Journal of Chemical Education, 1992
Fluorescence spectroscopy is a technique that is ideally suited for the undergraduate laboratory curriculum.
Lee K. Fraiji, David M. Hayes, T. C. Werner   +2 more
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Static and dynamic model for 4-aminodiphenyl fluorescence quenching by carbontetrachloride in hexane

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2004
The fluorescence quenching of 4-aminodiphenyl (4ADP) with chloromethanes (CH2Cl2, CHCl3 and CCl4) have been studied in solvents of different polarity and viscosity. The quenching rate constants (kq) have been determined in all solvents. For CCl4 and CHCl3 quenching, the kq depends on solvent viscosity whereas for CH2Cl2, the kq values show a mixed ...
M, Swaminathan, N, Radha
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Dynamic and Static Outer-Sphere and Inner-Sphere Quenching Processes

1987
Bimolecular quenching via energy or electron transfer of electronically excited states of coordination compounds in fluid solutions has been the subject of intesive investigations in the last ten years (Balzani 1978, Sutin 1979, Sutin 1980, Balzani 1981, Sutin 1982, Balzani 1983).
L. Checchi, C. Chiorboli, M. A. Rampi Scandola, F. Scandola   +3 more
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