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The metal complexes of new Schiff bases containing phosphonate groups and catalytic properties for alkane oxidation
Author(s) -
Dolaz Mustafa,
Kose Muhammet
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4970
Subject(s) - chemistry , cyclohexanol , cyclohexane , schiff base , selectivity , catalysis , ligand (biochemistry) , salicylaldehyde , phosphonate , metal , metal ions in aqueous solution , imine , photochemistry , medicinal chemistry , polymer chemistry , inorganic chemistry , organic chemistry , biochemistry , receptor
In this study, two new salicylidene phosphonate ligands (HL 1 and HL 2 ) and their metal complexes (Cu 2+ , VO 2+ and La 3+ ) were synthesized and characterized by spectroscopic and analytical methods. The molecular structure of the ligand HL 1 was determined by single‐crystal X‐ray diffraction study. In the structure of the ligand, there is an intramolecular phenol‐imine hydrogen bond. The synthesized compounds exhibit only one emission maximum upon excitation at 270–295 nm range. Complexation of the Schiff base ligands with metal ions did not cause a considerable quenching effect. Finally, the complexes prepared were used as catalysts in cyclohexane oxidation under microwave irradiation. The complexes showed high conversion rates (> 90%) for cyclohexane oxidation; however, poor selectivity was observed for all complexes. The La 3+ complexes showed better selectivity for cyclohexane → cyclohexanol transformation with about 45% selectivity.