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Title: Crystal structure, spectroscopic, magnetic and electronic structure studies of a novel Cu(II) amino acid complex [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O

Abstract

Single crystals of a novel copper (II) complex with the amino acid L-arginine (L-arg) and cyclotetraphosphate, [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O, were prepared in aqueous solution and were characterized by X-ray diffraction, spectroscopy (diffuse reflectance, UV-vis and IR) and thermal analysis. Magnetic measurements and electronic structure calculations were also performed. Crystal structure determination reveals that this compound has a nonsymmetrical atomic arrangement, containing mainly a binuclear [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}{sup 4+} cation and an uncoordinated cyclotetraphosphate counter-anion (P{sub 4}O{sub 12}{sup 4-}). The tetravalent cation contains two independent Cu(II) ions in two different chemical environments. This compound exhibits an antiferromagnetic (AFM) to paramagnetic (PM) phase transition at a temperature (T{sub N}) lower than 2 K. The values of paramagnetic Curie-Weiss temperature ({theta}{sub cw}) and the exchange parameter (J/K{sub B}) emphasize the existence of an antiferromagnetic interaction between the neighboring copper ions. - Graphical abstract: The atomic arrangement of [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O is built up of corrugated 2D-supramolecular layers and 1D-supramolecular anionic chain constructed by [P{sub 4}O{sub 12}(H{sub 2}O){sub 6}]{sub n}{sup 4n-}. Highlights: Black-Right-Pointing-Pointer Crystal structure of unusual cationic binuclear complex of [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O. Black-Right-Pointing-Pointer An anti-syn equatorial-apical carboxylate bridging modemore » of both copper (II) centers. Black-Right-Pointing-Pointer [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}{sup 4+} are held together by extensive H-bonds into wave-like layer. Black-Right-Pointing-Pointer Magnetic measurements exhibit an antiferomagnetic interaction between Cu(II). Black-Right-Pointing-Pointer Electronic structure calculation confirms the insulator state of the complex.« less

Authors:
 [1];  [2];  [3];  [1];  [4];  [2]
  1. Laboratoire de Physique Appliquee, Faculte des Sciences, B.P. 1171, 3000 Sfax, Universite de Sfax (Tunisia)
  2. Laboratory of Materials Chemistry, Faculty of Sciences of Bizerte, 7021 Zarzouna-Bizerte (Tunisia)
  3. Petrochemical Research Chair, College of Science, King Saud University, Riyadh (Saudi Arabia)
  4. Institut Neel, CNRS-Universite J. Fourier, BP 166, 38042 Grenoble (France)
Publication Date:
OSTI Identifier:
22149973
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 196; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ANIONS; ANTIFERROMAGNETISM; AQUEOUS SOLUTIONS; ARGININE; ATOMIC FORCE MICROSCOPY; CATIONS; COPPER; COPPER IONS; CRYSTAL STRUCTURE; ELECTRONIC STRUCTURE; INTERACTIONS; LAYERS; MONOCRYSTALS; PARAMAGNETISM; PHASE TRANSFORMATIONS; SPECTROSCOPY; THERMAL ANALYSIS; WATER; X-RAY DIFFRACTION

Citation Formats

Hemissi, H., E-mail: hanene.hemissi@fsb.rnu.tn, Nasri, M., Abid, S., Al-Deyab, S. S., Dhahri, E., Hlil, E. K., and Rzaigui, M. Crystal structure, spectroscopic, magnetic and electronic structure studies of a novel Cu(II) amino acid complex [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O. United States: N. p., 2012. Web. doi:10.1016/J.JSSC.2012.07.004.
Hemissi, H., E-mail: hanene.hemissi@fsb.rnu.tn, Nasri, M., Abid, S., Al-Deyab, S. S., Dhahri, E., Hlil, E. K., & Rzaigui, M. Crystal structure, spectroscopic, magnetic and electronic structure studies of a novel Cu(II) amino acid complex [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O. United States. doi:10.1016/J.JSSC.2012.07.004.
Hemissi, H., E-mail: hanene.hemissi@fsb.rnu.tn, Nasri, M., Abid, S., Al-Deyab, S. S., Dhahri, E., Hlil, E. K., and Rzaigui, M. Sat . "Crystal structure, spectroscopic, magnetic and electronic structure studies of a novel Cu(II) amino acid complex [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O". United States. doi:10.1016/J.JSSC.2012.07.004.
@article{osti_22149973,
title = {Crystal structure, spectroscopic, magnetic and electronic structure studies of a novel Cu(II) amino acid complex [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O},
author = {Hemissi, H., E-mail: hanene.hemissi@fsb.rnu.tn and Nasri, M. and Abid, S. and Al-Deyab, S. S. and Dhahri, E. and Hlil, E. K. and Rzaigui, M.},
abstractNote = {Single crystals of a novel copper (II) complex with the amino acid L-arginine (L-arg) and cyclotetraphosphate, [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O, were prepared in aqueous solution and were characterized by X-ray diffraction, spectroscopy (diffuse reflectance, UV-vis and IR) and thermal analysis. Magnetic measurements and electronic structure calculations were also performed. Crystal structure determination reveals that this compound has a nonsymmetrical atomic arrangement, containing mainly a binuclear [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}{sup 4+} cation and an uncoordinated cyclotetraphosphate counter-anion (P{sub 4}O{sub 12}{sup 4-}). The tetravalent cation contains two independent Cu(II) ions in two different chemical environments. This compound exhibits an antiferromagnetic (AFM) to paramagnetic (PM) phase transition at a temperature (T{sub N}) lower than 2 K. The values of paramagnetic Curie-Weiss temperature ({theta}{sub cw}) and the exchange parameter (J/K{sub B}) emphasize the existence of an antiferromagnetic interaction between the neighboring copper ions. - Graphical abstract: The atomic arrangement of [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O is built up of corrugated 2D-supramolecular layers and 1D-supramolecular anionic chain constructed by [P{sub 4}O{sub 12}(H{sub 2}O){sub 6}]{sub n}{sup 4n-}. Highlights: Black-Right-Pointing-Pointer Crystal structure of unusual cationic binuclear complex of [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}(P{sub 4}O{sub 12}){center_dot}8H{sub 2}O. Black-Right-Pointing-Pointer An anti-syn equatorial-apical carboxylate bridging mode of both copper (II) centers. Black-Right-Pointing-Pointer [Cu(L-arg){sub 2}(H{sub 2}O)]{sub 2}{sup 4+} are held together by extensive H-bonds into wave-like layer. Black-Right-Pointing-Pointer Magnetic measurements exhibit an antiferomagnetic interaction between Cu(II). Black-Right-Pointing-Pointer Electronic structure calculation confirms the insulator state of the complex.},
doi = {10.1016/J.JSSC.2012.07.004},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 196,
place = {United States},
year = {2012},
month = {12}
}