FT-IR spectroscopic and calorimetric characterization of the adsorbed forms of water on α-Fe2O3 obtained by thermal decomposition of α-FeOOH

1983 ◽  
Vol 9 (6) ◽  
pp. 561-570 ◽  
Author(s):  
Guido Bbuscå ◽  
Pier Francesco Rossi
Keyword(s):  
Thermal Decomposition ◽  
Ft Ir ◽  
Ir Spectroscopic

Spectral Investigation on the Growth and Characterization of NLO Crystals of Thiourea Succinic Acid Single Crystal.

2015 ◽  
Vol 2 (2) ◽  
pp. 70-73
Author(s):  
Kannan.P ◽  
Thambidurai.S ◽  
Suresh.N
Keyword(s):  
Single Crystal ◽  
Succinic Acid ◽  
Slow Evaporation Technique ◽  
Absorption Studies ◽  
Dta Analysis ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Thermal Stability Of

Growth of optically transparent single crystals of thiourea succinic acid (TUSA) was grown successfully from aqueous solution by slow evaporation technique. The crystal structure was elucidated using the single crystal XRD. The various functional groups and the modes of vibrations were identified by FT-IR spectroscopic analysis. The optical absorption studies indicate that the optical transparency window is quite wide making its suitable for NLO applications. Thermal stability of the crown crystal carried out by TGA-DTA analysis.

Steroid Compounds Isolation from Carthamus tinctorius Linn as Antimalarial

2021 ◽  
pp. 5297-5304
Author(s):  
Rini Hamsidi ◽  
Wahyuni Wahyuni ◽  
Adryan Fristiohady ◽  
Muhammad Hajrul Malaka ◽  
Idin Sahidin ◽  
...  
Keyword(s):  
Antimalarial Activity ◽  
Carthamus Tinctorius ◽  
Spectroscopic Techniques ◽  
1H And 13C Nmr ◽  
Marker Compound ◽  
Ic50 Value ◽  
Ft Ir ◽  
Ir Spectroscopic

Carthamus tinctorius Linn, also known as safflower, is a plant with the potential of being used in the production of antimalarial drugs. The purpose of this study was to isolate and identify the steroid compounds in the safflower and determine its antimalarial activity in vitro. The isolation process was conducted through extraction and chromatography methods. Then, the characterization of the isolated compounds was conducted through spectroscopic techniques which include Fourier Transform Infrared Spectroscopy (FT-IR), NMR 1-D (1H and 13C-NMR), and NMR 2-D (HMQC, HMBC, and H-H COZY) as well as comparing data with the existing literatures. In addition, the tests conducted were with variations of isolate concentrations (10, 1, 0.1, 0.01, and 0.001 μg/mL) against 3D7 strain of Plasmodium falciparum. Based on the FT-IR spectroscopic data, the steroid compounds isolated from safflowers might be stigmasterols. In addition, the isolates had -OH functional group in the region of 3431 cm-1, C-O in the region of 1053 cm-1, and Csp3-H in regions of 2960, 2934, and 2865 cm-1. The NMR 1-D data showed presence of 29 carbon atoms, while the protons were 48 in number. Furthermore, the IC50 value of the compound was 34.03 μg/mL with a percentage inhibition of 43.92% against the growth of P. falciparum. Therefore, it was classified as inactive agent in inhibiting the growth of malaria parasites, however, it could be used as a marker compound in C. tinctorius Linn extract.

scholarly journals Adsorption of Chromium(VI) Ions on to TiO2 from Aqueous Solution

1998 ◽  
Vol 16 (2) ◽  
pp. 117-126 ◽  
Author(s):  
Fu Hongxiang ◽  
Lu Gongxuan ◽  
Li Shuben
Keyword(s):  
Heavy Metal Ions ◽  
Ion Concentration ◽  
Spectroscopic Methods ◽  
Ion Adsorption ◽  
Adsorption Efficiency ◽  
Organic Species ◽  
Chromium Vi ◽  
Ft Ir ◽  
Ir Spectroscopic

The study of the adsorption of the CrVI ion on to TiO2 not only provides information on the removal of heavy metal ions from polluted aqueous solutions; but is also useful for further investigation of the photocatalytic decontamination of the CrVI ion or of CrVI–organic species which co-exist as pollutants with TiO2 when the latter is used as a stable and highly efficient photocatalyst. It has been found that dark adsorption of the CrVI ion on to TiO2 is mainly dependent on the acidity of the system and the initial concentration of the CrVI ion. As the pH of the system increases, so the extent of adsorption of the CrVI ion decreases. The greatest adsorption was obtained with an initial CrVI ion concentration of ca. 300 μmol/l. The presence of phosphate or acetate ions in the system dramatically decreases the adsorption efficiency of the CrVI ion. In contrast, the addition of formic acid leads to a limited increase in the extent of CrVI ion adsorption. Other organic ions and organic compounds examined showed no interference in CrVI ion adsorption. FT-IR spectroscopic methods were used for the characterization of CrVI ion adsorption on to TiO2.

scholarly journals Preparation and Characterization of Cu (II), Mn(II) and Zn(II)complexes with new sulfamethoxazole Compounds

2017 ◽  
Vol 14 (3) ◽  
pp. 575-581
Author(s):  
Baghdad Science Journal
Keyword(s):  
Magnetic Susceptibility ◽  
Melting Point ◽  
Metal Complexes ◽  
Atomic Absorption ◽  
Spectroscopic Methods ◽  
Aqueous Alcohol ◽  
Spectroscopic Techniques ◽  
Ft Ir ◽  
Ir Spectroscopic

Acetophenone sulfamethoxazole and 3-Nitrobenzophenone sulfamethoxazole were prepared from the reaction of sulfamethoxazole with two ketones. The prepared ligands were identified by (C.H.N) analysis and UV-VIS, FT-IR spectroscopic techniques. Metal complexes of the two ligands were prepared in an aqueous alcohol with Zn (II), Mn (II) and Cu (II) ions with a molar ratio1:1. The proposed general formula for the resulting complexes was [ML.CL2.H2O]H2O .The complexes were characterized by (C.H.N) technique , spectroscopic methods ,conductivity, atomic absorption ,magnetic susceptibility measurements and melting point. According to the results obtained, the suggested geometry is to be octahedral for all the complexes.

scholarly journals Preparation and Characterization of the Schiff Base Ligand (E)- N-(3-nitrobenzylidene) isonicotinohydrazide and its Silver (I) Complex [Ag(NNBIH)2]+

2012 ◽  
Vol 9 (2) ◽  
pp. 191-195
Author(s):  
SHAHRIAR GHAMMAMY ◽  
SAJJAD SEDAGHAT
Keyword(s):  
Thermal Decomposition ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Synthesis And Characterization ◽  
Nitrate Salt ◽  
Visible Spectroscopy ◽  
Multistage Processes ◽  
Ft Ir ◽  
Uv Visible

We describe the synthesis and characterization of a new silver (I) complex of the Schiff base ligand (E) - N-(3-nitrobenzylidene) is onicotinohydrazide that abbreviated as NNBIH was synthesized and characterized. Ag (I) Metal complex of this Schiff base ligand prepared by reaction of nitrate salt of Ag (I) with NNBIH. Characterization of the ligand was made by microanalyses, FT-IR, UV–Visible spectroscopy and its complex was made by microanalyses, FT-IR and UV–Visible spectroscopy. TG- DTA and other analytical methods have been applied to the investigation of the thermal behavior and Structure of the compound [Ag(NNBIH)2]+. Thermal decomposition of these compounds is multistage processes.

Toward the characterization of biological toxins using field-based FT-IR spectroscopic instrumentation

2004 ◽  
Author(s):  
David W. Schiering ◽  
Robert B. Walton ◽  
Christopher W. Brown ◽  
Mark L. Norman ◽  
Joseph Brewer ◽  
...  
Keyword(s):  
Ft Ir ◽  
Spectroscopic Instrumentation ◽  
Ir Spectroscopic

scholarly journals Synthesis and characterization of new 2-amino-4-(substituted phenyl)-6-(7’’-methoxy, 3’’,4’’-dihydro, 2’’,2’’-dimethyl-2hbenzopyran) pyrimidines and their bio evaluation

2012 ◽  
Vol 77 (7) ◽  
pp. 859-866
Author(s):  
Y.L.N. Murthy ◽  
Padma Suhasini ◽  
Jha Anjali
Keyword(s):  
Bacillus Pumilus ◽  
Antimicrobial Properties ◽  
Spectroscopic Techniques ◽  
Gram Negative Bacteria ◽  
Antibacterial And Antifungal Activities ◽  
Ft Ir ◽  
Inhibition Zones ◽  
Antibacterial And Antifungal ◽  
Ir Spectroscopic

A series of eight novel 2-amino-4-(substituted phenyl)-6-(7"- methoxy, 3",4"-dihydro, 2",2"-dimethyl-2H-benzopyran) pyrimidines were designed and synthesized by utilizing benzene-1,3-diol as starting material. The structures of the isolated products (6a-h) were established through 1HNMR, 13C-NMR, and FT-IR spectroscopic techniques and elemental analysis. The synthesized compounds were utilized for screening antimicrobial properties against gram positive (Bacillus pumilus, Bacillus subtilis, Streptococcus faecalis), gram negative bacteria (Enterococcus faecalis, Escheria coli, Proteus vulgaris) and fungi (Pencillian expasom, Aspergillus niger, Candida albicans) using Ampicillin and Ketoconazole. Most of the compounds showed moderate to high antibacterial and antifungal activities against studied strains with inhibition zones between 8 and 30 mm.

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