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Chirality Transfer in Magnetic Coordination Complexes Monitored by Vibrational and Electronic Circular Dichroism
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SYSNO ASEP 0429578 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Chirality Transfer in Magnetic Coordination Complexes Monitored by Vibrational and Electronic Circular Dichroism Author(s) Wu, T. (CN)
Zhang, X. P. (CN)
You, X. Z. (CN)
Li, Y. Z. (CN)
Bouř, Petr (UOCHB-X) RID, ORCIDNumber of authors 5 Source Title ChemPlusChem. - : Wiley - ISSN 2192-6506
Roč. 79, č. 5 (2014), s. 698-707Number of pages 10 s. Language eng - English Country DE - Germany Keywords chirality ; circular dichroism ; iron ; magnetic properties ; Schiff bases Subject RIV CF - Physical ; Theoretical Chemistry Institutional support UOCHB-X - RVO:61388963 UT WOS 000335515800009 EID SCOPUS 84900392868 DOI 10.1002/cplu.201300429 Annotation Magnetic coordination complexes based on Schiff bases are promising new molecular materials for electronics. Two -oxo Fe-III dimeric complexes of enantiomers of Schiff base ligands (N,N-(1R,2R)-1,2-diphenylethylenebis(salicylideneimine) (H(2)salphen-R, 1a) and N,N-(1S,2S)-1,2-diphenylethylenebis(salicylideneimine) (H(2)salphen-S, 1b)) were synthesized; further reaction with 4-salicylideneamino-1,2,4-triazole (Hsaltrz) led to enantiomers of two one-dimensional (1D) Fe-III coordination complexes. The structures of these complexes were determined by X-ray diffraction. Magnetic susceptibility measurements revealed that -oxo dimeric complexes displayed strong antiferromagnetic coupling, whereas the 1D complexes exhibited paramagnetic behavior. The chirality of the Schiff bases transferred to macromolecular chirality of the complexes, which could be monitored by both vibrational and electronic circular dichroism (CD) spectroscopic methods. The macroscopic handedness was manifested in CD signals attributed to exciton coupling between the ligands. Thus, the chiral spectroscopies were useful to probe the chirality of the complexes, their structure, and the polymerization degree. Workplace Institute of Organic Chemistry and Biochemistry Contact asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Jana Procházková, Tel.: 220 183 418 Year of Publishing 2015
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