Effect of Heat Treatment in a Reducing Atmosphere on Absorption and Luminescence Spectra of Y2SiO5:Се Crystals

2019 ◽  
Vol 55 (8) ◽  
pp. 815-819
Author(s):  
M. Kh. Ashurov ◽  
I. Nuritdinov ◽  
Z. U. Esanov ◽  
K. Kh. Saidakhmedov
Keyword(s):  
Heat Treatment ◽  
Luminescence Spectra ◽  
Reducing Atmosphere ◽  
Absorption And Luminescence Spectra

Absorption and luminescence spectra of amorphous CdI2 thin films

1999 ◽  
Vol 101-103 ◽  
pp. 299-302 ◽  
Author(s):  
Kazutoshi Fukui ◽  
Kenji Asakura ◽  
Ken-ichi Niimi ◽  
Ikuto Ishizue ◽  
Hideyuki Nakagawa
Keyword(s):  
Thin Films ◽  
Luminescence Spectra ◽  
Absorption And Luminescence Spectra

Tuning the Photophysical Properties of Cyclometalated Ir(III) Complexes by a Trifluoroacetyl Group

2012 ◽  
Vol 67 (3) ◽  
pp. 213-218 ◽  
Author(s):  
Bihai Tong ◽  
Jiayan Qiang ◽  
Qunbo Mei ◽  
Hengshan Wang ◽  
Qianfeng Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Electron Acceptor ◽  
Photophysical Properties ◽  
Red Shift ◽  
Luminescence Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Absorption And Luminescence Spectra ◽  
Homo Lumo

Four cationic Ir(III) complexes, [Ir(dpq)2(bpy)]PF6 (1), [Ir(dpq)2(phen)]PF6 (2), [Ir(tfapq)2- (bpy)]PF6 (3), and [Ir(tfapq)2(phen)]PF6 (4) (dpqH = 2,4-diphenylquinoline, tfapqH = 2-(4ʹ-trifluoroacetylphenyl)- 4-phenylquinoline, bpy = 2,2ʹ-bipyridine, phen = 1,10-phenanthroline) have been synthesized and fully characterized. The structure of 4 was also confirmed by single-crystal X-ray diffraction. The electron-acceptor character of the trifluoroacetyl unit leads to a reduced HOMO-LUMO gap and consequently a red-shift of the UV/Vis absorption and luminescence spectra. The solvophobic character of the trifluoroacetyl unit gives rise to a molecule assembly in solution.

Electronic Spectral Investigations upon the Photochemical Transformations of Some Substituted 1-(N,N-bisacyl)amino-4,5-diphenyl-l,2,3-triazoles

2001 ◽  
Vol 56 (6-7) ◽  
pp. 452-458
Author(s):  
Irina Petkova ◽  
Apostolos J. Maroulis ◽  
Constantina Hadjiantoniou-Maroulis ◽  
Peter Nikolov
Keyword(s):  
Steady State ◽  
Room Temperature ◽  
Uv Light ◽  
Uv Absorption ◽  
Luminescence Spectra ◽  
Model Compounds ◽  
Photochemical Transformations ◽  
Absorption And Luminescence Spectra ◽  
Photochemical Properties ◽  
Substituted 1

Abstract The objective of this report is to investigate the steady state and dynamic photophysical and photochemical properties of 1-(N,N-bisacyl)amino-4,5-diphenyl-1,2,3-triazoles in solvents of dif­ferent polarity at room temperature and in frozen matrix at 77 K. On the basis of the comparison of their UV absorption and luminescence spectra with those of 4,5-diphenyl-1,2,3-triazole and diben-zamide (model compounds), cleavage of the N-N bond in the title compounds after irradiation with polychrome UV light is proved.

The Effect of Heat Treatment on the Optical Properties of Copper-Containing Lithium-Potassium-Borate Glasses

2018 ◽  
Vol 57 (1) ◽  
pp. 116-120
Author(s):  
P.S. Shirshnev ◽  
V.L. Ugolkov ◽  
Zh.G. Snezhnaia ◽  
D.I. Panov ◽  
E.V. Shirshneva-Vaschenko ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Raman Scattering ◽  
Copper Ions ◽  
Xrd Analysis ◽  
Luminescence Spectra ◽  
Borate Glasses ◽  
Potassium Borate ◽  
Narrow Bands

Abstract The paper presents the investigation of lithium-potassium-alumoborate glasses (0- 25 mol.% Li2O) doped by copper ions. The effect of glass annealing on the Raman scattering patterns is discussed. It is shown that such an annealing results in drastic changes in the Raman scattering patterns for the glass with 10 mol.%of Li2O: the band at 481 cm-1 conventionally attributed to boron-oxygen bonds in metaborate rings disappears, while a set of narrow bands at 1236, 1500, and 1783 cm-1 is observed. We consider one of these bands, 1783 cm-1, as being the identifier of the formed Li(Al7B4O17) nanophase, XRD analysis supported the above suggestion. The effect of newly formed nanophase on the luminescence spectra is discussed.

Absorption and luminescence spectra of U+3 in Cs2NaYCl6

1988 ◽  
Vol 174 ◽  
pp. 443-448 ◽  
Author(s):  
Z. Mazurak ◽  
J. Drozdzynski ◽  
J. Hanuza
Keyword(s):  
Luminescence Spectra ◽  
Absorption And Luminescence Spectra
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