Solvothermal Syntheses and Characterization of Three Lanthanide Thioantimonates(V) with Mixed Ethylene Polyamines

2013 ◽  
Vol 68 (2) ◽  
pp. 133-137 ◽  
Author(s):  
Jian Zhou ◽  
Xing Liu ◽  
Feilong Hu
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Trigonal Prism ◽  
Optical Absorption Spectra ◽  
Neutral Complex ◽  
Solvothermal Syntheses ◽  
Absorption Edges

Three new lanthanide thioantimonates(V) [Ln(en)(teta)(SbS4)] {Ln=Sm (1), Eu (2), Gd (3); en=ethylenediamine; teta=triethylenetetramine} have been solvothermally synthesized and structurally characterized. Compounds 1 - 3 are isostructural. The [SbS4]3- anion acting as bichelating ligand is bound to the [Ln(en)(teta)]3+ ion, resulting in a neutral complex [Ln(en)(teta)(SbS4)]. The central Ln3+ ion lies within an eight-coordinate environment forming a distorted bicapped trigonal prism LnN6S2. Although a few lanthanide thioantimonates have been reported to date, they only contain one type of ethylene polyamine. Compounds 1 - 3 are rare examples of lanthanide thioantimonates with mixed ethylene polyamine ligands. The absorption edges of 1:75 eV for 1 and 2:27 eV for 3 have been derived from optical absorption spectra.

scholarly journals Obtaining and Analysis of Optical Absorption Spectrum of Fisher Rat Blood with Hepatic Damage by Photoacoustic Spectroscopy

2017 ◽  
Author(s):  
◽  
M. L. Alvarado-Noguez1
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Liver Damage ◽  
Photoacoustic Spectroscopy ◽  
Curcuma Longa ◽  
Photothermal Techniques ◽  
Optical Absorption Spectra ◽  
Complementary Technique ◽  
Different Types

Photoacoustic Spectroscopy (PAS) stand outs among Photothermal techniques due to its versatility for the characterization of different types of materials, including biological samples. In this study, were compared and analyzed by PAS, the differences between the optical absorption spectra of blood of male Fisher rats, in three cases, control (healthy rats), liver damage and liver damage treated with Curcuma longa. The experimental results show differences in the optical absorption spectra of each analysed case, therefore PAS would be proposed as a non conventional complementary technique, to study the effect of Curcuma longa in induced liver damage for an animal model.

Preparation and Characterization of (C6H5CH2CH2NH3)4BiI7 · H2O, (C6H5CH2CH2NH3)3BiBr6 and (C6H5CH2CH2NH3)3BiCl6

1995 ◽  
Vol 50 (10) ◽  
pp. 1566-1569 ◽  
Author(s):  
G. C. Papavassiliou ◽  
I. B. Koutselas ◽  
A. Terzis ◽  
C. P. Raptopoulou
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Spectral Region ◽  
Visible Spectral Region ◽  
Optical Absorption Spectra ◽  
Uv Visible

The title compounds were prepared and characterized analytically, structurally, and spectroscopically. They contain isolated BiX6 (X = I. Br, Cl) anions. Their optical absorption spectra show excitonic bands in the UV-visible spectral region. These bands occur at higher energies than the corresponding bands of R3M2X9 (R = MemNH4-m; m = 1,2, 3, 4).

Synthesis, Structural and Optical Characterization of II-VI Semiconductors Included in Sodalite-Type Hosts

1989 ◽  
Vol 164 ◽  
Author(s):  
K. L. Moran ◽  
W. T. A. Harrison ◽  
T. E. Gier ◽  
J. E. Mac Dougall ◽  
G. D. Stucky
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Structural Characterization ◽  
Optical Characterization ◽  
Solid State Chemistry ◽  
Optical Absorption Spectra ◽  
X Ray

AbstractSolid-state chemistry has been used to control both the size and the interconnection distance of small II-VI semiconductor moeities incorporated in zeolitic hosts with the sodalite-type structure. Structural characterization was carried out using X-ray Rietveld powder methods, and optical properties of these materials were also measured. These novel materials show quantum superlattice effects as evidenced by blue shifts in their optical absorption spectra.

scholarly journals Fast optical absorption spectra calculations for periodic solid state systems

2020 ◽  
Vol 15 (1) ◽  
pp. 89-113
Author(s):  
Felix Henneke ◽  
Lin Lin ◽  
Christian Vorwerk ◽  
Claudia Draxl ◽  
Rupert Klein ◽  
...  
Keyword(s):  
Solid State ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Optical Absorption Spectra

NIR and Upconversion Luminescence Properties of Nd3+ Doped in Gd2O3-CaO-SiO2-B2O3 Glass System

2014 ◽  
Vol 548-549 ◽  
pp. 124-128 ◽  
Author(s):  
S. Insiripong ◽  
S. Kaewjeang ◽  
U. Maghanemi ◽  
H.J. Kim ◽  
N. Chanthima ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Upconversion Luminescence ◽  
Emission Spectra ◽  
Concentration Quenching ◽  
Luminescence Spectra ◽  
Optical Absorption Spectra ◽  
Glass Matrices ◽  
Nir Luminescence

In this work, properties of Nd3+ in Gd2O3-CaO-SiO2-B2O3 glass systems with composition 25Gd2O3-10CaO-10SiO2-(55-x)B2O3-xNd2O3 where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol% were investigated. The optical absorption spectra show peaks at 4F3/2 (877 nm) , 4F5/2+2H9/2 (802 nm), 4F7/2+4S3/2 (743 nm), 4F9/2 (682 nm), 2H11/2 (627 nm), 2G7/2 +4G5/2 (582 nm), 4G7/2 +2K13/2 (527 nm), 4G11/2 (481 nm), 2P1/2 (427 nm) and 2L15/2 + 4D1/2 + 1I11/2+ 4D5/2+ 4D3/2 (355 nm) reflecting the Nd3+ ions in glass matrices. The densities were increased with increasing of Nd2O3 concentration. This indicates the increase of the molecular weight by the replacement of B2O3 with a heavier Nd2O3 oxide in the glass. The upconversion luminescence spectra show bands at 393 nm for all Nd2O3 concentration and the strongest intensity from 2.5 % mol of Nd2O3 was obtained. For NIR luminescence, the intensity of Nd3+ emission spectra increases with increasing concentrations of Nd3+ up to 1.5 mol% and beyond 1.5 mol% the concentration quenching is observed.

OPTICAL ABSORPTION SPECTRA OF ARSENIC AND PHOSPHORUS IN SILICON

1962 ◽  
Vol 40 (10) ◽  
pp. 1480-1489 ◽  
Author(s):  
J. W. Bichard ◽  
J. C. Giles
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Excited States ◽  
Ground State ◽  
Absorption Lines ◽  
Full Width ◽  
Optical Absorption Spectra ◽  
Phosphorus Impurity ◽  
Line Widths ◽  
Phosphorus In Silicon

The optical absorption spectra of arsenic and phosphorus donor impurities in silicon have been studied under conditions of improved resolution. Absorption lines due to transitions from the impurity ground state to the excited states 2p0, 2p±, 3p0, 3p±, 4p0, 4 p±, and 5p0, and 5p± have been observed at 4.2° K. The relative intensities of some of these absorption lines are compared with existing experimental and theoretical estimates. The contribution of instrumental broadening to the observed line widths is assessed and natural line widths are estimated. The estimates indicate values for the natural line widths which are much less than those previously reported. For phosphorus impurity, the natural line widths are estimated to be less than 0.08 × 10−3 electron volts full width at half-maximum. The possibility of concentration broadening is discussed in connection with the arsenic data.

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