Effect of inhomogeneous broadening on the fluorescence anisotropy of a square-symmetric molecule

2002-07-30
Knox, RS
Gulen, D
Lotterhos, KE
Inhomogeneous broadening has the potential of introducing a new picosecond-range quasi-relaxation rate in an electronically twofold-degenerate system such as a molecule whose symmetry is square (D-4h). The physics of the process is the mutual cancellation of oscillatory contributions whose periods are determined by the random energy splittings. The effect occurs only for quite specific conditions of excitation and line broadening, and may be useful in the interpretation of existing experiments on magnesium tetraphenyl porphyrin.
CHEMICAL PHYSICS LETTERS

Suggestions

Effect of low-energy electron irradiation on (Bi, Pb)-2212 superconductors
Ogun, SE; Goktas, H; Ozkan, H; Hasanlı, Nızamı (Elsevier BV, 2005-06-22)
The effect of low-energy electron irradiation on the properties of the Bi-based superconductors is studied. Two sets of polycrystalline (Bi, Pb)-2212 samples were synthesized by heating the appropriate mixtures of powders at 840 degrees C for 100 h, then quenched or furnace cooled to room temperature. The samples were irradiated by low-energy (1-10 keV), pulsed (20 ns) electron beam up to a dose of 6.2 x 10(15) cm(-2). X- ray diffraction patterns, resistance-temperature behaviours, critical currents, and mi...
EFFECT OF FEED COMPOSITION ON THE PERFORMANCE OF POLYMER-ZEOLITE MIXED MATRIX GAS SEPARATION MEMBRANES
BATTAL, T; BAC, N; Yılmaz, Levent (Informa UK Limited, 1995-01-01)
An emerging membrane morphology with future potential is mixed matrix membranes composed of two interpenetrating matrices of different materials. In this study, mixed matrix membranes of an amorphous glassy polymer(polyethersulfone) and hydrophilic zeolite (4A) were prepared. An elaborate membrane preparation technique that enables incorporation of high zeolite loading into the membrane was developed. Performance of membranes was tested by using a laboratory-scale gas separation apparatus. The permeation ra...
Effect of Y Addition on the Structural Properties and Oxidation Behavior of Fe60Al40-nYn Alloys (n=1, 3, and 5 at.%)
Yildirim, Mehmet; Atas, Mehmet Sahin; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (2022-04-01)
The influence of Y addition on the microstructural features, phase relationships, hardness, magnetic behaviour and cyclic oxidation performance of Fe60Al40-nYn alloys (n = 1, 3, and 5 at.%) has been examined in detail. Al8Fe4Y phase formed even at 1 at.% Y addition because of the limited solid solubility of Y in the FeAl-based phase. For all the examined compositions, the Al8Fe4Y phase developed a eutectic with the FeAl-based phase and its volume fraction increased with increasing Y up to 5 at.%, which is n...
Effect of pH, flow rate and concentration on the sorption of Pb and Cd on montmorillonite: II. Modelling
Altin, O; Ozbelge, OH; Doğu, Timur (Wiley, 1999-12-01)
A mathematical model is proposed and compared with experimental data for the migration of heavy metal ions (Pb and Cd) during the flow of aqueous solutions through calcium-saturated montmorillonite packing. The main system parameters are pH, flow rate and concentration. It is assumed that the Liquid phase in the porous montmorillonite can be divided into two regions, mobile and immobile; that adsorption and ion exchange on the clay surface are instantaneous, and that adsorption isotherms are Linear througho...
Effect of silver encapsulation on the local structure of titanosilicate ETS-10
GALIOGLU, Sezin; ZAHMAKIRAN, Mehmet; Kalay, Yunus Eren; Özkar, Saim; Akata, Burcu (2012-09-01)
Silver(0) nanoparticles stabilized by titanosilicate (ETS-10) framework were synthesized by following a simple two step procedure involving the incorporation of silver(I) (Ag+) ions into ETS-10 matrix via ion-exchange with extra framework Na+ and K+ cations followed by their reduction with sodium borohydride (NaBH4) in aqueous medium all at room temperature. Silver(0) nanoparticles dispersed in the ETS-10 matrix were collected as gray powders and characterized by using advanced analytical methods including ...
Citation Formats
R. Knox, D. Gulen, and K. Lotterhos, “Effect of inhomogeneous broadening on the fluorescence anisotropy of a square-symmetric molecule,” CHEMICAL PHYSICS LETTERS, pp. 285–290, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66523.