Spectroscopic properties of SO4 in different molecular and crystalline environments. II. Identification and infrared spectra of Cu3O2SO4 and its hydroxylated derivative

1988 ◽  
Vol 66 (2) ◽  
pp. 337-340 ◽  
Author(s):  
Etalo A. Secco
Keyword(s):  
Infrared Spectra ◽  
Spectroscopic Properties ◽  
First Time ◽  
Strong Contrast

The infrared spectra of Cu3O2SO4, identified for the first time and obtained from three different preparations are reported. The proposed structure of Cu3O2SO4 contains the copper oxysulfate anion [(CuO)2SO4]2− of Cs symmetry with each CuO attached by the Cu to two oxygens of the SO4 group. Of the 21 infrared-active modes predicted for this anion 17 modes are discernible. Its hydroxylated derivative Cu3(OH)4SO4 shows clearly resolved and evenly split peaks of the v3 mode of SO4 in strong contrast to the strong overlap of this mode in its crystalline analog; the frequencies of the remaining SO4 modes stay effectively unchanged.

Spectroscopic properties of SO4 (and OH) in different molecular and crystalline environments. I. Infrared spectra of Cu4(OH)6SO4, Cu4(OH)4OSO4, and Cu3(OH)4SO4

1988 ◽  
Vol 66 (2) ◽  
pp. 329-336 ◽  
Author(s):  
Etalo A. Secco
Keyword(s):  
Infrared Spectra ◽  
Dipolar Coupling ◽  
Group Analysis ◽  
Spectroscopic Properties ◽  
Site Symmetry ◽  
Oh Groups ◽  
Distinct Individual ◽  
Multiple Frequencies ◽  
Bending Modes ◽  
First Time

The infrared spectra over the range 4000–50 cm−1 of three copper basic sulfates, viz. Cu4(OH)6SO4, Cu4(OH)4OSO4, Cu3(OH)4SO4 along with site group and factor group analysis for Cu4(OH)6SO4 are reported for the first time. The observed absorption frequencies associated with OH and SO4 activities show distinct individual structural features.Three distinct types of OH groups are present in Cu4(OH)6SO4 and Cu4(OH)4OSO4 but only two types are evident in Cu3(OH)4SO4. The two OH groups involved in the dehydroxylation reaction to give the oxycompound Cu4(OH)4OSO4 are tentatively identified. The multiple frequencies involving Cu—O—H bending modes further reflect the varying degrees of H-bonding and OH coupling in Cu(OH)4O2 and Cu(OH)5O entities.The SO4 internal optic modes' multiplet structure and frequencies in the basic sulfates illustrate the different extent of dipolar coupling effects (OH and Cu) with respect to specific modes relative to Li2SO4 with same site symmetry. The SO4 external optic modes relative to Li2SO4 are barely affected by neighboring OH groups.The Cu—O mode frequencies show parallel behavior with minor interaction effects in all compounds.

Growth, thermal, and spectroscopic properties of a 2.911 μm Yb,Ho:GdYTaO4 laser crystal

CrystEngComm ◽  
2014 ◽  
Vol 16 (48) ◽  
pp. 11007-11012 ◽  
Author(s):  
Renqin Dou ◽  
Qingli Zhang ◽  
Dunlu Sun ◽  
Jianqiao Luo ◽  
Huajun Yang ◽  
...  
Keyword(s):  
Laser Crystal ◽  
Czochralski Method ◽  
Spectroscopic Properties ◽  
First Time

A promising 2.911 μm Yb,Ho:GdYTaO4 laser crystal was grown successfully by the Czochralski method for the first time.

Synthesis of α-Fluoro-β-lactones and Their Thermal Conversion to 1-Fluoroalkenes

2002 ◽  
Vol 67 (9) ◽  
pp. 1325-1334 ◽  
Author(s):  
Rogelio Ocampo ◽  
William R. Dolbier ◽  
Fabio Zuluaga
Keyword(s):  
Spectroscopic Properties ◽  
Thermal Conversion ◽  
Hydroxy Acids ◽  
Preliminary Results ◽  
First Time

α-Fluoro-β-lactones have been synthesized and isolated for the first time from α-fluoro-β-hydroxy acids by using the couple TsCl/DMAP as lactonization agent. A detailed description of the synthesis and spectroscopic properties of α-fluoro-β-lactones is presented. Preliminary results indicate that thermolysis of these new β-lactones produces 1-fluoroalkenes.

A phthalocyanine–subphthalocyanine heterodinuclear dimer: comparison of spectroscopic properties with those of homodinuclear dimers of constituting units

2014 ◽  
Vol 50 (23) ◽  
pp. 3040-3043 ◽  
Author(s):  
Norio Shibata ◽  
Satoru Mori ◽  
Masamichi Hayashi ◽  
Masashi Umeda ◽  
Etsuko Tokunaga ◽  
...  
Keyword(s):  
Spectroscopic Properties ◽  
X Ray ◽  
X Ray Crystallography ◽  
First Time

A phthalocyanine–subphthalocyanine heterodinuclear dimer has been disclosed for the first time with its unique flat-bowl-shaped structure revealed by X-ray crystallography.

Spectroscopic properties of Er3+ ions in Li(Er, Gd)P4O12 single crystals — fluorescence, Raman and infrared spectra

1983 ◽  
Vol 79 (2) ◽  
pp. 255-267 ◽  
Author(s):  
Z. Mazurak ◽  
J. Hanuza ◽  
K. Hermanowicz ◽  
B. Jeżowska-Trzebiatowska ◽  
D. Schultze ◽  
...  
Keyword(s):  
Single Crystals ◽  
Infrared Spectra ◽  
Spectroscopic Properties

Studies on metal hydroxy compounds. II. Infrared spectra of zinc derivatives ϵ-Zn(OH)2, β-ZnOHCl, ZnOHF, Zn5(OH)8Cl2, and Zn5(OH)8Cl2·H2O

1967 ◽  
Vol 45 (6) ◽  
pp. 585-588 ◽  
Author(s):  
O. K. Srivastava ◽  
E. A. Secco
Keyword(s):  
Infrared Spectra ◽  
Group Factor ◽  
Absorption Bands ◽  
Site Group ◽  
Planar Molecule ◽  
Stretching Vibration ◽  
Hydroxy Compounds ◽  
A Site ◽  
First Time ◽  
Unambiguous Assignment

Infrared spectra of ϵ-Zn(OH)2, β-ZnOHCl, ZnOHF, Zn5(OH)8Cl2, and Zn5(OH)8Cl2·H2O and their deuterated analogues in the range 2.5–16 μ are reported for the first time. The effects of substituting a halogen for an OH group in Zn(OH)2 are (i) sharper OH stretching absorption bands, (ii) splitting of bands involving OH to give distinct doublets in ZnOHF and Zn5(OH)8Cl2, indicating strong intermolecular coupling, and (iii) shift of the OH stretching vibration to a higher frequency. Strong absorption bands are observed in the region of 695–780 cm−1 for all compounds and also near 1 020 ± 30 cm−1 in all cases except ZnOHCl. All the observed bands are displaced to lower frequencies by the deuterated analogues, with vH/vD ratios in the range 1.30–1.36. A cursory interpretation of the spectra of ZnOHCl and ZnOHF is given in terms of a planar molecule of Cs symmetry, but the unambiguous assignment of the bands must await a site group or group factor analysis.

The Preparation and Low-Frequency Vibrational Spectra of Some Copper(I) and Silver(I) Alkane- and Arene-monothiolate Complexes

1979 ◽  
Vol 32 (7) ◽  
pp. 1443 ◽  
Author(s):  
GA Bowmaker ◽  
L Tan
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Low Frequency ◽  
Far Infrared ◽  
New Methods ◽  
Thiolate Complexes ◽  
New Compounds ◽  
First Time ◽  
Far Infrared Spectra

A number of different methods for preparing anionic Group 1B metal thiolate complexes have been investigated. The compounds [Me4N] [CU2(SMe)3] and [Et4N] [Ag5(SBut)6] are reported for the first time, and new methods for preparing the previously known compounds [Et4N] [Cu5(SBut)6], [Me4N]2 [CU5(SPh)7] and [Et4N]2 [Cu5(SPh)7] are described. The far-infrared spectra of the above compounds, and of CuSMe, CuSBut, AgSBut, [Me4N]2 [CU4(SPh)6] and [Me4N]2 [Ag5(SPh)7] have been obtained, and metal-sulfur stretching bands are assigned in the 150-350 cm-1 region. The low-frequency Raman spectra have also been obtained for some of these compounds. Possible structures for the new compounds are considered in the light of the low-frequency vibrational spectra.

Effect of dopant concentration on the spectroscopic properties in an In3+ doped (0, 1, 2 and 4 mol%) Yb:Tm:LiNbO3 crystal

RSC Advances ◽  
2015 ◽  
Vol 5 (46) ◽  
pp. 36385-36389 ◽  
Author(s):  
Li Dai ◽  
Zhehua Yan ◽  
Shanshan Jiao ◽  
Chao Xu ◽  
Yuheng Xu
Keyword(s):  
Dopant Concentration ◽  
Spectroscopic Properties ◽  
Czochralski Technique ◽  
First Time

A series of Yb:Tm:LiNbO3 crystals with x mol% In3+ ions (x = 0, 1,2 and 4 mol%) were grown by a conventional Czochralski technique for the first time.

Isolation, characterization, and antimicrobial activity of communic acid from Juniperus phoenicea

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mariam Achir ◽  
Mohamed Dakir ◽  
Abdelhakim El Makssoudi ◽  
Asmae Belbachir ◽  
Farida Adly ◽  
...  
Keyword(s):  
Inhibition Zone ◽  
Spectroscopic Properties ◽  
High Yield ◽  
Gram Positive Bacteria ◽  
Chemical Structures ◽  
Soxhlet Apparatus ◽  
Juniperus Phoenicea ◽  
Antibacterial And Antifungal ◽  
First Time ◽  
Better Than

Abstract Objectives A mixture of Z and E communic acid is isolated for the first time from the cones of Juniperus phoenicea. Its biological activity was studied. Methods The plant material was extracted in a Soxhlet apparatus with n-hexane, the resulting extract was subjected to column chromatography (CC) on silica gel. The structure elucidation of the constituents of the isolated fraction was identified by comparison of its spectroscopic properties 1H and 13C NMR data with those reported in the literature. The antimicrobial assay of hexanic extract and isolated compounds was carried out by the disc diffusion and micro-dilution methods. Results A mixture of two diterpene acids isomers was isolated, with a high yield (68%). Their chemical structures were confirmed after comparing their spectral data with published reports. These natural products exhibited a significant antibacterial and antifungal activity against the tested strains. Indeed, for Bacillus cereus, Staphylococcus aureus, and Pseudomonas aeruginosa, the inhibition zone diameters (36–37 mm) was better than penicillin, novobiocin, and amoxicillin. For Candida albicans activity, it show that the mixture possess an activity similar to that of Metrazol. Against Escherichia coli, the inhibitory activity was found less than Amoxicillin. This is the first report of isolation of communic acid from J. phoenicea. Conclusions These results showed that the cones of J. phoenicea were an important source of communic acid, and its hexanic extract had the greatest potential antibacterial activity against both Gram-negative and Gram-positive bacteria and C. albicans.

scholarly journals Synthesis and spectroscopic properties of β-meso directly linked porphyrin–corrole hybrid compounds

2018 ◽  
Vol 14 ◽  
pp. 187-193 ◽  
Author(s):  
Baris Temelli ◽  
Hilal Kalkan
Keyword(s):  
Fluorescence Spectroscopy ◽  
Condensation Reaction ◽  
2D Nmr ◽  
Spectroscopic Properties ◽  
H Nmr ◽  
Hybrid Compounds ◽  
Absorption And Fluorescence Spectroscopy ◽  
First Time ◽  
C Nmr

The preparation of β-meso directly linked porphyrin–corrole hybrids was realized for the first time via an InCl3-catalyzed condensation reaction of 2-formyl-5,10,15,20-tetraphenylporphyrins with meso-substituted dipyrromethanes. Hybrid compounds have been characterized by 1H NMR, 13C NMR, 2D NMR, UV–vis absorption and fluorescence spectroscopy.

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