Results 241 to 250 of about 98,065 (290)
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Fluorescence quenching in Nd:YAG
Applied physics, 1973We show that quenching of the Nd fluorescence is in principle not associated with the Nd3+ ion but with the host. The process is due to near-field electric dipole interaction between Nd pairs, and cross relaxation via the4I1 5/2 manifold. We present for the first time the complete fluorescence spectrum and level scheme of Nd∶YAG, and find that Nd∶YAG ...
M. Blätte, H. G. Danielmeyer, P. Balmer
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1983
Fluorescence quenching refers to any process which decreases the fluorescence intensity of a given substance. A variety of processes can result in quenching. These include excited state reactions, energy transfer, complex formation, and collisional quenching.
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Fluorescence quenching refers to any process which decreases the fluorescence intensity of a given substance. A variety of processes can result in quenching. These include excited state reactions, energy transfer, complex formation, and collisional quenching.
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On the Concentration Quenching of Fluorescence Polarization
1973Applying Forster's "excitation master equations" which describe the motion of the excitation energy among the molecules of a solution, an expression is found for the probability Plk that the excitation terminates on the same molecule which served as the absorber of the incident photon.
A. Kawski, J. Kamiński
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Magnetic quenching of fluorescence in NO2
The Journal of Chemical Physics, 1973Author Institution: The James Franck Institute and Department of Chemistry, The University of ...
Butler, Shala +2 more
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[10] Solute quenching of protein fluorescence
1978Publisher Summary This chapter considers various ways of presenting and interpreting data using model calculations based on the modified Stern–Volmer equation. It provides detail information about the experimental methods for the purpose of obtaining meaningful quenching data. A quencher molecule can deactivate an excited fluorophor at the instant of
Paul C. Leavis, Sherwin S. Lehrer
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Nanoparticle induced fluorescence quenching
Radiation Physics and Chemistry, 1997Fluorescence quenching of some dyes and probe molecules residing near the surface of very small silver metal particulate has been described. The quenching effect has been shown to be surface induced which has been authenticated by the reversible formation and destruction of the particle surface.
Tapan K. Sau +2 more
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Charge Transfer and Fluorescence Quenching
The Journal of Chemical Physics, 1960A charge-transfer-interaction mechanism has been proposed for the quenching of fluorescence of a number of polynuclear aromatic hydrocarbons by aromatic solvents, especially methylated benzenes. The quenching efficiency has been found to be in the order benzene<toluene<xylene<mesitylene, which is also the order in which ionization ...
Sadhan Basu, Dilip Kuman Majumdar
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FLUORESCENCE QUENCHING OF INDOLE BY DIMETHYLFORMAMIDE
Photochemistry and Photobiology, 1984Abstract— The effect of dimethylformamide on the lifetime (T) and quantum yield (F) of indole has been determined. Negative Stern‐Volmer deviations prevail for T and F, but F0/F T0/T at all DMF concentrations. The deviation between F0/F and T0/T is ascribed to changes in F0 and T0 induced by the change in solvent composition at the higher quencher ...
Mary K. Campbell +2 more
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QUENCHING OF METHYLCYCLOHEXANE FLUORESCENCE BY METHANOL*
Photochemistry and Photobiology, 1995Abstract—We measured the fluorescence emission spectrum and intensity decays of methylcyclohexane (MCH) when excited by simultaneous absorption of two photons at 298 nm. The steady‐state intensities and lifetimes were both decreased by methanol, which was found to be an efficient quencher of MCH fluorescence.
Joseph R. Lakowicz, Ignacy Gryczynski
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Fluorescence Quenching of Aminodiphenylamines with Chloromethanes
Collection of Czechoslovak Chemical Communications, 2002The fluorescence quenching of 2-aminodiphenylamine (2ADPA), 4-aminodiphenylamine (4ADPA) and 4,4'-diaminodiphenylamine (DADPA) with tetrachloromethane, chloroform and dichloromethane have been studied in hexane, dioxane, acetonitrile and methanol as solvents.
Nachiappan Radha +1 more
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