Results 271 to 280 of about 1,139,926 (347)
Some of the next articles are maybe not open access.
Steric effect on fluorescence quenching
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2005In this communication we have reported the steric effect on the fluorescence quenching rate constants of the electron transfer (ET) process. We have done a comparative study using donor (D)-acceptor (A) systems with different exergonicity (-deltaG(f)). Different carbazole derivatives (CZ): 1,4-dicyanobenzene (DCB) systems (-deltaG(f) = 0.7-0.8 eV) were
Nandita Ghosh +3 more
openaire +2 more sources
ACS Applied Materials and Interfaces, 2016
The recent discovery of biomass-derived carbon quantum dots (CQDs) offers the potential to extend the sensing and imaging capabilities of quantum dots (QDs) to applications that require biocompatibility and environmental friendliness.
Zicheng Liang +4 more
semanticscholar +1 more source
The recent discovery of biomass-derived carbon quantum dots (CQDs) offers the potential to extend the sensing and imaging capabilities of quantum dots (QDs) to applications that require biocompatibility and environmental friendliness.
Zicheng Liang +4 more
semanticscholar +1 more source
Fluorescence quenching of acridines by strandin
Archives of Biochemistry and Biophysics, 1961Abstract The interaction of four acridine compounds with strandin has been studied, with special attention being directed to acriflavine. In all cases fluorescence quenching by strandin occurs, the nature of the quenching curve depending on the dye involved.
Sheila K. Weintraub +2 more
openaire +3 more sources
Kinetics of Fluorescence Quenching by Electron and H‐Atom Transfer
, 1970Fluorescence quenching rate constants, kq, ranging from 106 to 2 × 1010 M−1 sec−1, of more than 60 typical electron donor-acceptor systems have been measured in de-oxygenated acetonitrile and are shown to be correlated with the free enthalpy change, ΔG23,
D. Rehm, A. Weller
semanticscholar +1 more source
THE QUENCHING OF THE IODINE FLUORESCENCE SPECTRUM [PDF]
Canadian Journal of Chemistry, 1958 The quenching of the iodine fluorescence spectrum by various inert gases and oxygen has been studied with a view to obtaining information on the efficiencies of vibration energy transfer processes in this system. Preliminary results here presented are in agreement with earlier work of Rössler and Eliaschevich and indicate that the transfer processes ...
C. A. McDowell, C. Arnot
openaire +1 more source
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
openaire +2 more sources
Fluorescence Anisotropy Controlled by Light Quenching
Photochemistry and Photobiology, 1998We demonstrated that fluorescence anisotropy can be effectively decreased or increased in the presence of light quenching, depending on relative polarizations of excitation and quenching pulses. For parallel light quenching, anisotropy decreases to 0.103 and z-axis symmetry is preserved.
Joseph R. Lakowicz +2 more
openaire +4 more sources
Chlorophyll fluorescence quenching by xanthophylls [PDF]
Physical Chemistry Chemical Physics, 2003 The interactions of the xanthophylls zeaxanthin, antheraxanthin and violaxanthin with chlorophyll, which are relevant for the chlorophyll fluorescence quenching in the non-photochemical quenching (NPQ) process in green plants, are investigated by means of quantum chemical methods.
Andreas Dreuw +2 more
openaire +1 more source
Dalton Transactions, 2011
In the article, a novel fluorescent probe for the copper cation based on fluorescence quenching mechanism was designed. It exhibited high selectivity for Cu(II) over other common metal ions in aqueous media.
Zengchen Liu +7 more
semanticscholar +1 more source
In the article, a novel fluorescent probe for the copper cation based on fluorescence quenching mechanism was designed. It exhibited high selectivity for Cu(II) over other common metal ions in aqueous media.
Zengchen Liu +7 more
semanticscholar +1 more source
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
openaire +2 more sources