期刊
INORGANICA CHIMICA ACTA
卷 394, 期 -, 页码 203-209出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2012.08.007
关键词
Binuclear Co(II) Schiff bases; Molecular modeling; O-O Activation; Alcohol oxidation
资金
- Academy of Finland [251531, 209739]
- Academy of Finland (AKA) [251531, 209739, 251531, 209739] Funding Source: Academy of Finland (AKA)
Two new, bridged bis(salen-type) ligand precursors, 1,1,3,3-tetrakis(salicylidene-3-iminopropyl)butylenediamine (I) and 1,1,3,3-tetra(salicylideneiminomethyl)propane (IV), were prepared by Schiff base condensation of salicylaldehyde with appropriate tetraamines. Corresponding binuclear Co(II) complexes 1 and 2 were obtained with moderate yields and the complexes were characterized in detail. Structural optimizations of the complexes were carried out at the B3LYP/6-311G/* level of theory. Dioxygen coordination abilities of 1 and 2 were studied experimentally by UV-Vis spectroscopy and compared with traditional N,N'-ethylenebis(salicylideniminato)Co(II), Co(salen) (3). In addition, catalytic activities of 1 and 2 in comparison with various mononuclear salen-type Co complexes (3-7) were studied in the oxidation of 3,4-dimethoxybenzyl alcohol (veratryl alcohol) in alkaline aqueous solutions. (C) 2012 Elsevier B. V. All rights reserved.
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