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ESR spectra studies of Cu(II) 2, 4‐dihydroxybenzaldehyde tyrosine complex
Author(s) -
Chen DeYu,
Shi WeiLiang
Publication year - 2000
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20000180613
Subject(s) - chemistry , copper , spectral line , schiff base , electron paramagnetic resonance , complex formation , hamiltonian (control theory) , crystallography , analytical chemistry (journal) , inorganic chemistry , nuclear magnetic resonance , organic chemistry , quantum mechanics , physics , mathematical optimization , mathematics
A novel Schiff base derived from 2,4‐dihydroxybenzaldehyde and tyrosine and its copper(II) complex have been synthesized and characterized. The composition of the complex is K[CuL]·H 2 O, where L=H 11 C 26 NO 5 . ESR spectra of the copper(II) complex were investigated at different temperatures and in various solvents. The second order effect and the relaxation effect were observed in the solution spectrum at room temperature, which was satisfactorily explained by spin Hamiltonian. The bonding parameters of copper(II) complex were calculated using spectral parameters from ESR spectra at low temperature. Its banding characterization and stability were dismissed. The result shows that the in‐plane α‐bond and the in‐plane π‐bond in the complex all play an important role.