Synthesis
and characterisation of one trinuclear copper complex, ([Cu<sub>3</sub>L<sub>3</sub>O]ClO<sub>4</sub>)
(<b>1</b>) and one nickel complex ([Ni(L'H)<sub>2</sub>(dmso)<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub>)
(<b>2</b>) with Schiff base ligands: (3Z)-3-((Z)-(1-(thiophen-2-yl)ethylidene)hydrazono)butan-2-one
oxime (LH) and 1-(pyridin-2-yl)ethylidene)hydrazono)butan-2-one
oxime (L<sup>'</sup>H). <b>1</b> shows high catecholase activity and has also been tested as a
catalyst for the synthesis of benzylimine. <b>2 </b> shows phenoxazinone synthase activity.
Four coordination compounds are designed with pyridinemethanol ligands, characterized with spectral, magnetic and X-ray analyses, and assessed for catecholase activity in various solvents.
A new Fe(iii) complex (F1), structurally characterised using single crystal X-ray studies, was explored for CO2 fixation, Zn2+ recognition and catecholase activity.
A Cu(ii) complex, [Cu(L1Hpy)Cl]2(ClO4)2, of a tridentate pyridoxal Schiff base shows exceptionally high catalytic efficiency (kcat = 3.46 × 105 h−1) for catecholase activity in MeOH solution, the highest value reported in literature so far.
Herein, we report the first example of a new Co7 disc-like cluster with a solvent dependent catecholase activity characterized by spectral, X-ray and magnetic studies.
Exploring a new dinuclear Fe(iii) complex for the fixation of atmospheric CO2 and optical recognition of nano-molar levels of Zn2+ ions