An Introduction to Practical Infra-red Spectroscopy

Cross, A. D.; Jones, Robert W.

doi:10.1007/978-1-4899-6596-7

Cited by 156 publications

(108 citation statements)

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“…Since compounds having different structures do not have the same IR spectra, except for optical isomers (Cross 1969;Kumosinski and Farrell Jr, 1993), unique molecular fingerprints that can be easily distinguished from the absorption patterns produced by other molecules (Byler and Susi 1986;Helm et al 1991a,b). Moreover, FTIR is a nondestructive technique and allows the rapid characterization of structural features of biological molecules and complex materials like bacteria Organisms cm be probed by FTIR in a single expriment using simple, uniform procedures that are applicable to al1 bacteria (Helm et al 199 1a.b;Naumann et al 199 1).…”

Section: Introductionmentioning

confidence: 99%

Identification of contamination sources of Bacillus cereus in pasteurized milk

Lin

Schraft

Odumeru

et al. 1998

International Journal of Food Microbiology

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Section: Introductionmentioning

confidence: 99%

Identification of contamination sources of Bacillus cereus in pasteurized milk

Lin

Schraft

Odumeru

et al. 1998

International Journal of Food Microbiology

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“…Table 2. The band at 1712 cm -1 originating from the RCOOH group, presented in the acid spectrum, is replaced in the spectra of complexes by two bands at 1600-1596 cm -1 , and 1412-1392 cm -1 , which can be ascribed to the asymmetric and symmetric vibrations of COO -group, respectively [25][26][27][28]. The bands attributed to asymmetric and symmetric C-H stretching modes of the -CH 3 groups are observed at 2944-2936 cm -1 , and 2840-2832 cm -1 , respectively.…”

Section: Resultsmentioning

confidence: 98%

“…The bands attributed to asymmetric and symmetric C-H stretching modes of the -CH 3 groups are observed at 2944-2936 cm -1 , and 2840-2832 cm -1 , respectively. The bands with the maxima at 3670-3552 cm -1 in the spectra of 2,6-dimethoxybenzoates of Co(II), Ni(II), and Cu(II) are characteristic for ν (OH) vibration [26][27][28]. The bands of ν (C=C) ring vibrations appear at 1480-1432 cm -1 , 1304-1288 cm -1 , and 644-640 cm -1 , and those corresponding to M-O stretching appear at 472-424 togram analyses suggest them to be polycrystalline compounds with various degrees of crystallinity [30].…”

Section: Resultsmentioning

confidence: 99%

Magnetic, thermal and spectral characterization of 2,6-dimethoxybenzoates of Co(II), Ni(II) and Cu(II)

2006

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Abstract:The complexes of 2,6-dimethoxybenzoic acid anion with ions of Co(II), Ni(II), and Cu(II) have been synthesized as polycrystalline solids, and characterized by elemental analysis, spectroscopy, magnetic studies, and also by X-ray diffraction and thermogravimetric measurements. The analysed complexes have following colours: pink for Co(II), green for Ni(II), and blue for Cu(II) compounds. The carboxylate group binds as monodentate, and bidentate bridging and chelating ligands. On heating in air to 1173 K the complexes decompose in four, three or two steps. At first, they dehydrate in one or two steps to anhydrous salts, that next decompose to oxides of the respective metals. The solubility of the investigated dimethoxybenzoates in water at 293 K is of the order of 10 -2 mol/dm 3 . Their magnetic moments were determined in the temperature range of 76-303 K. The results reveal the compounds of Co(II) and Ni(II) to be high-spin complexes and that of Cu(II) to form dimer.

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“…This indicates that the acetate group is coordinated with the metal ion through the two O atoms. 11,[23][24][25] Finally, the spectrum of the Cd(II) complex showed a band at 3439 cm -1 which was attributed to the ν(H 2 O) crystal water molecule.…”

Section: 2 Ir Spectral Studiesmentioning

confidence: 99%

PREPARATION, SPECTROSCOPIC CHARACTERIZATION OF A NEW Cd(II) COMPLEX CONTAINING TRIDENTATE NNO SCHIFF BASE DERIVED AND X-RAY CRYSTALLOGRAPHIC STRUCTURAL STUDY OF 3,4,5-TRIHYDROXYBENZOIC ACID[1-(PYRIDYL)-ETHYLIDENE]HYDRAZONE

Alhadi

Shaker

et al. 2012

J. Chil. Chem. Soc.

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A new Cd(II) complex with a tridentate Schiff base derivative which was obtained from condensation of gallic hydrazid with 2-acetylpyridine has been prepared. The structure of the ligand 3,4,5-Trihydroxybenzoic acid[1-(pyridyl)-ethylidene]hydrazone (GAPy) was confirmed using the X-ray structure analysis. The elemental analysis, FTIR, UV-Vis, 1 H NMR spectral and Thermal analysis indicates that the Schiff base ligand GAPy is a tridentate ligand which is coordinated with the Cd(II) complex through N,N and O atoms. Thus, the acetate ion is a bidentate ligand that is coordinated with the metal ion through two O atoms.Keywords: Schiff base derivatives, Cd(II) complexes, hydrazone derivatives complexes, spectroscopic characterization.e-mail: drshaimaa611@yahoo.com INTRODUCTIONSchiff bases from gallic hydrazides are well known as polydentate ligands which are considered as an important class of ligands in coordination chemistry. 1 Thus, gallic hydrazide and its substituted derivative have been prepared and characterized during the past few years. 2-9 Metal complexes of tridentate Schiff base ligands with donor atoms such as (NNO) have attracted considerable attention because they display anti-fungal activity against various fungal such as Aspergillus Flavus, Trichophyton longifusus, Candida albicans and Microsporum canis. 4,10 Moreover, these complexes display remarkable antitumor activity against HL60 and A-549 cancer cell lines, and also display antioxidative, anti-inflammatory, antimutagenic, anticarcinogenic and antiallergic activities. 11 The hydrazone group has two imino and amino nitrogen atoms whose valance electrons differ in their degree of hybridization. The possibility of chelate formation via a hydrogen bond between the nitrogen atom of a gallic hydrazones and the hydrogen atom of the OH group of salicyldehyde has been reported. [12][13][14][15] Since little work has been reported on Cd(II) complex containing 3,4,5-Trihydroxybenzoic acid[1-(pyridyl)-ethylidene]hydrazide. We prepared the schiff base from gallic hydrazide and synthesized the complex with Cd(II) ion. Uv-Vis, IR, and TGA spectroscopy as well as X-ray diffraction were used to examine the coordination site of the ligand and the geometry of the complex. EXPERIMENTAL Techniques and MaterialsAll chemicals were obtained from commercial sources and were used without further purifications (Cd(II)acetate, gallic hydrazide, 2-acetylpyridine, ethanol, DMSO, DMF, Triethylamine, KBr) from Merck (Darmstadt, Germany).Infrared spectra were obtained using KBr discs (4000-400 cm -1 ) on a Perkin-Elmer FT-IR spectrometer (Kyoto, Japan). Measurement of UV-Vis spectra were carried out using a Shimadzu UV-VIS spectrophotometer UV-160 (Hitachi, Tokyo, Japan) in 10 -3 M DMSO solution. Thermal analysis of the complex was performed on a Perkin-Elmer Pyris Diamond DTA/TG Thermal System under a nitrogen atmosphere at a heating rate of 10 o C/min and within a heating range of 30-900 o C. Elemental analysis (C, H, N) was performed by using a Flash EA 1112 Series el...

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An Introduction to Practical Infra-red Spectroscopy

Cited by 156 publications

References 0 publications

Identification of contamination sources of Bacillus cereus in pasteurized milk

Identification of contamination sources of Bacillus cereus in pasteurized milk

Magnetic, thermal and spectral characterization of 2,6-dimethoxybenzoates of Co(II), Ni(II) and Cu(II)

PREPARATION, SPECTROSCOPIC CHARACTERIZATION OF A NEW Cd(II) COMPLEX CONTAINING TRIDENTATE NNO SCHIFF BASE DERIVED AND X-RAY CRYSTALLOGRAPHIC STRUCTURAL STUDY OF 3,4,5-TRIHYDROXYBENZOIC ACID[1-(PYRIDYL)-ETHYLIDENE]HYDRAZONE

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