Wydział Chemii

Yeasin Sikdar

Ritwik Modak

Dipayan Bose

Saswati Banerjee

Dariusz Bieńko

Wiktor Zierkiewicz

Alina Bieńko

Krishna Das Saha

Sanchita Goswami

2015

Dalton Transactions

44

8876-8888

10.1039/c5dt00752f

Naukowa

Angielski

Artykuł

We have synthesized and structurally characterized a new doubly chloro bridged dimeric copper(II) complex, [Cu₂(μ-Cl)₂(HL)₂Cl₂] (1) based on a Schiff base ligand, 5-[(pyridin-2-ylmethylene)-amino]-pentan-1-ol). Single crystal X-ray diffraction shows the presence of dinuclear copper(II) centres in a square pyramidal geometry linked by obtuse double chloro bridge. The magnetic study illustrated that weak antiferromagnetic interactions (J = −0.47 cm⁻¹) prevail in complex 1 which is well supported by magneto-structural correlation. This compound adds to the library of doubly chloro bridged copper(II) complexes in the regime of spin state cross over. DFT calculations have been conducted within a broken-symmetry (BS) framework to investigate the exchange interaction further which depicts that the approximate spin projection technique yields the best corroboration of the experimental J value. Spin density plots show the presence of an ∼0.52e charge residing on the copper atom along with a substantial charge on bridging and peripheral chlorine atoms. The potential of complex 1 to act as an anticancer agent is thoroughly examined on a series of liver cancer cell lines and screening shows the HepG2 cell line exhibits maximum cytotoxicity by phosphatidyl serine exposure in the outer cell membrane associated with ROS generation and mitochondrial depolarization with increasing time in the in vitro model system.

http://dx.doi.org/10.1039/c5dt00752f

https://www.rsc.org/