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Berestova TV, Khursan SL, Mustafin AG. Experimental and theoretical substantiation of differences of geometric isomers of copper(II) α-amino acid chelates in ATR-FTIR spectra. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 229:117950. [PMID: 31862653 DOI: 10.1016/j.saa.2019.117950] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 11/20/2019] [Accepted: 12/10/2019] [Indexed: 06/10/2023]
Abstract
Stereo and structural isomerism of the copper(II) chelate complexes define their biological activity. At the same time, the identification of the geometric isomers of such complexes is a nontrivial task of modern coordination chemistry. In the presented work we have studied the trans- and cis-isomers of chelates bis(S-valinato)copper(II), (R,S-valinato)copper(II) and other mixed ligand copper(II) amino acid complexes with the joint use of experimental by ATR-FTIR spectroscopy and DFT simulations. Using DFT simulations (method M06/6 311+G(d)) the optimum conformers of the geometric isomers of copper(II) a-amino acid chelate complexes were found and their characteristic stretching vibrations were established in the mid-wave region of the IR spectra. The experimental ATR-FTIR bands of the compounds well agree with the theoretical estimates. Such a joint use allows to determine of cis- and trans-isomers of copper(II) N,O-amino acid chelates in the mid-wave region of the ATR-FTIR spectrum.
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Affiliation(s)
| | - Sergey L Khursan
- Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, Ufa, Russian Federation
| | - Akhat G Mustafin
- Bashkir State University, Department of Chemistry, Ufa, Russian Federation; Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, Ufa, Russian Federation
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Berestova TV, Kuzina LG, Amineva NA, Faizrakhmanov IS, Massalimov IA, Mustafin AG. ATR-FTIR spectroscopic investigation of the cis- and trans- bis-( α -amino acids) copper(II) complexes. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.02.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lutz OMD, Messner CB, Hofer TS, Glätzle M, Huck CW, Bonn GK, Rode BM. Combined Ab Initio Computational and Infrared Spectroscopic Study of the cis- and trans-Bis(glycinato)copper(II) Complexes in Aqueous Environment. J Phys Chem Lett 2013; 4:1502-1506. [PMID: 26282305 DOI: 10.1021/jz400288c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The cis- and trans-bis(glycinato)copper(II) complexes in aqueous solution have been investigated by means of a combined theoretical and experimental approach. The conducted quantum mechanical charge field molecular dynamics (QMCF-MD) studies, being the first quantum mechanical simulations of organometallic complexes by this method, yielded accurate structural details of the investigated isomers as well as novel dynamic data, which has successfully been confirmed and extended by subsequent mid-infrared measurements. The spectroscopic results, critically assessed by adjacent multivariate data analysis, indicate an isomeric stability at ambient conditions, vanishing at elevated temperatures.
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Affiliation(s)
- Oliver M D Lutz
- †Theoretical Chemistry Division, Institute of General, Inorganic and Theoretical Chemistry, ‡Institute of Analytical Chemistry and Radiochemistry, and ⊥General and Inorganic Chemistry Divison, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens University, Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Christoph B Messner
- †Theoretical Chemistry Division, Institute of General, Inorganic and Theoretical Chemistry, ‡Institute of Analytical Chemistry and Radiochemistry, and ⊥General and Inorganic Chemistry Divison, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens University, Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Thomas S Hofer
- †Theoretical Chemistry Division, Institute of General, Inorganic and Theoretical Chemistry, ‡Institute of Analytical Chemistry and Radiochemistry, and ⊥General and Inorganic Chemistry Divison, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens University, Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Matthias Glätzle
- †Theoretical Chemistry Division, Institute of General, Inorganic and Theoretical Chemistry, ‡Institute of Analytical Chemistry and Radiochemistry, and ⊥General and Inorganic Chemistry Divison, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens University, Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Christian W Huck
- †Theoretical Chemistry Division, Institute of General, Inorganic and Theoretical Chemistry, ‡Institute of Analytical Chemistry and Radiochemistry, and ⊥General and Inorganic Chemistry Divison, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens University, Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Günther K Bonn
- †Theoretical Chemistry Division, Institute of General, Inorganic and Theoretical Chemistry, ‡Institute of Analytical Chemistry and Radiochemistry, and ⊥General and Inorganic Chemistry Divison, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens University, Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Bernd M Rode
- †Theoretical Chemistry Division, Institute of General, Inorganic and Theoretical Chemistry, ‡Institute of Analytical Chemistry and Radiochemistry, and ⊥General and Inorganic Chemistry Divison, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens University, Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
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