THE STUDY OF CLINOPTILOLITE MODIFIED WITH3d METALS HALIDES BY IR AND DIFFUSE REFLECTANCE SPECTROSCOPY
The results of investigation of natural clinoptilolite (N-CLI) and that modified with 3d metal halides (MeCl2/N-CLI, where Me are Cu, Co, and Mn) by IR and diffuse reflectance spectroscopy are summarized. A band at 3437 cm-1 assigned to stretching vibrations of hydroxyl groups (nOH) is found in the...
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Odessa I. I. Mechnikov National University
2015-11-01
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doaj-381d322a59144d08a2734495b2dd8fd52020-11-24T22:52:43ZengOdessa I. I. Mechnikov National University Vìsnik Odesʹkogo Nacìonalʹnogo Unìversitetu: Hìmìâ2304-09472414-59632015-11-01202(54)61510.18524/2304-0947.2015.2(54).5062450624THE STUDY OF CLINOPTILOLITE MODIFIED WITH3d METALS HALIDES BY IR AND DIFFUSE REFLECTANCE SPECTROSCOPYT. L. Rakitskaya0A.S. Truba1L. A. Raskola2I. V. Stoyanova3Одеський національний університет імені І. І. Мечникова, кафедра неорганічної хімії та хімічної екологіїОдеський національний університет імені І. І. Мечникова, кафедра неорганічної хімії та хімічної екологіїОдеський національний університет імені І. І. Мечникова, кафедра неорганічної хімії та хімічної екологіїОдеський національний університет імені І. І. Мечникова, кафедра неорганічної хімії та хімічної екологіїThe results of investigation of natural clinoptilolite (N-CLI) and that modified with 3d metal halides (MeCl2/N-CLI, where Me are Cu, Co, and Mn) by IR and diffuse reflectance spectroscopy are summarized. A band at 3437 cm-1 assigned to stretching vibrations of hydroxyl groups (nOH) is found in the IR spectrum of the N-CLI sample. A location of the band was practically the same as for all above MeCl2/N-CLI samples. A band of middle intensity at 1638 cm-1 in the range of deformation vibrations of zeolite water observed in the IR spectrum of N-CLI slightly displays to lower frequencies in the case of the modified samples. An intensive wide band of a complex shape in the range from 1250 to 980 cm-1 assigned to Si–O–Si and Si–O–Al vibrations appears in IR spectra of all samples. A doublet band of middle intensity at 797 and 778 cm-1 is assigned to external symmetric stretching T-O vibrations and a band at 606 cm-1-to vibrations of a double ring. A location of the above bands is the same for all listed samples but their intensity is higher for MnCl2/N-CLI and CoCl2/N-CLI samples. After the reaction with ozone, significant changes in the IR spectra are observed only for MnCl2/N-CLI. They are due to MnO2 formation on the clinoptilolite surface resulting in a high frequency displacement of some bands. Based on UV-vi spectroscopy results, it is reasonable to make conclusions about the coordination and valence state of a central atom in the MeCl2/N-CLI samples under study. A location of charge transfer bands for these samples only slightly differs from that for N-CLI however the intensity of such bands increases for the MeCl2/N-CLI samples. The UV-vis spectrum of MnCl2/N-CLI changes after the reaction with ozone: the appearance of new bands of charge transfer at 363 and 354 nm and also the two-fold increase in intensity of a charge transfer band at 272 nm in comparison with those of N-CLI and MnCl2/N-CLI are the evidence of change in both the oxidation degree and the ligand environment of the central atom. Absorbance bands due to d-d transfers which are absent in the visible region of N-CLI and Mn(II)/N-CLI spectra are observed in those of Cu(II)/N-CLI and Co(II)/N-CLI. Cu(II) has been found to be in the distorted octahedral oxygen or mixed oxygen-chloride environment whereas the environment of Co(II) is pseudotetrahedral.http://heraldchem.onu.edu.ua/article/view/50624клиноптилоліт, галогеніди 3d-металів, ІЧ-спектр, дифузне відбиття |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
T. L. Rakitskaya A.S. Truba L. A. Raskola I. V. Stoyanova |
spellingShingle |
T. L. Rakitskaya A.S. Truba L. A. Raskola I. V. Stoyanova THE STUDY OF CLINOPTILOLITE MODIFIED WITH3d METALS HALIDES BY IR AND DIFFUSE REFLECTANCE SPECTROSCOPY Vìsnik Odesʹkogo Nacìonalʹnogo Unìversitetu: Hìmìâ клиноптилоліт, галогеніди 3d-металів, ІЧ-спектр, дифузне відбиття |
author_facet |
T. L. Rakitskaya A.S. Truba L. A. Raskola I. V. Stoyanova |
author_sort |
T. L. Rakitskaya |
title |
THE STUDY OF CLINOPTILOLITE MODIFIED WITH3d METALS HALIDES BY IR AND DIFFUSE REFLECTANCE SPECTROSCOPY |
title_short |
THE STUDY OF CLINOPTILOLITE MODIFIED WITH3d METALS HALIDES BY IR AND DIFFUSE REFLECTANCE SPECTROSCOPY |
title_full |
THE STUDY OF CLINOPTILOLITE MODIFIED WITH3d METALS HALIDES BY IR AND DIFFUSE REFLECTANCE SPECTROSCOPY |
title_fullStr |
THE STUDY OF CLINOPTILOLITE MODIFIED WITH3d METALS HALIDES BY IR AND DIFFUSE REFLECTANCE SPECTROSCOPY |
title_full_unstemmed |
THE STUDY OF CLINOPTILOLITE MODIFIED WITH3d METALS HALIDES BY IR AND DIFFUSE REFLECTANCE SPECTROSCOPY |
title_sort |
study of clinoptilolite modified with3d metals halides by ir and diffuse reflectance spectroscopy |
publisher |
Odessa I. I. Mechnikov National University |
series |
Vìsnik Odesʹkogo Nacìonalʹnogo Unìversitetu: Hìmìâ |
issn |
2304-0947 2414-5963 |
publishDate |
2015-11-01 |
description |
The results of investigation of natural clinoptilolite (N-CLI) and that modified with 3d metal halides (MeCl2/N-CLI, where Me are Cu, Co, and Mn) by IR and diffuse reflectance spectroscopy are summarized. A band at 3437 cm-1 assigned to stretching vibrations of hydroxyl groups (nOH) is found in the IR spectrum of the N-CLI sample. A location of the band was practically the same as for all above MeCl2/N-CLI samples. A band of middle intensity at 1638 cm-1 in the range of deformation vibrations of zeolite water observed in the IR spectrum of N-CLI slightly displays to lower frequencies in the case of the modified samples. An intensive wide band of a complex shape in the range from 1250 to 980 cm-1 assigned to Si–O–Si and Si–O–Al vibrations appears in IR spectra of all samples. A doublet band of middle intensity at 797 and 778 cm-1 is assigned to external symmetric stretching T-O vibrations and a band at 606 cm-1-to vibrations of a double ring. A location of the above bands is the same for all listed samples but their intensity is higher for MnCl2/N-CLI and CoCl2/N-CLI samples. After the reaction with ozone, significant changes in the IR spectra are observed only for MnCl2/N-CLI. They are due to MnO2 formation on the clinoptilolite surface resulting in a high frequency displacement of some bands. Based on UV-vi spectroscopy results, it is reasonable to make conclusions about the coordination and valence state of a central atom in the MeCl2/N-CLI samples under study. A location of charge transfer bands for these samples only slightly differs from that for N-CLI however the intensity of such bands increases for the MeCl2/N-CLI samples. The UV-vis spectrum of MnCl2/N-CLI changes after the reaction with ozone: the appearance of new bands of charge transfer at 363 and 354 nm and also the two-fold increase in intensity of a charge transfer band at 272 nm in comparison with those of N-CLI and MnCl2/N-CLI are the evidence of change in both the oxidation degree and the ligand environment of the central atom. Absorbance bands due to d-d transfers which are absent in the visible region of N-CLI and Mn(II)/N-CLI spectra are observed in those of Cu(II)/N-CLI and Co(II)/N-CLI. Cu(II) has been found to be in the distorted octahedral oxygen or mixed oxygen-chloride environment whereas the environment of Co(II) is pseudotetrahedral. |
topic |
клиноптилоліт, галогеніди 3d-металів, ІЧ-спектр, дифузне відбиття |
url |
http://heraldchem.onu.edu.ua/article/view/50624 |
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