Double advantages of 2D coordination polymer of coumarinyl‐pyridyl Schiff base decorated Zn(II): The fabrication of Schottky device and Anti‐carcinogenic activity

Abstract

A 2D coordination polymer, [Zn2(BDC)4(QPR)2(H2O)]n (Zn(II)‐CP) (BDC2− = 1,4‐benzenedicarboxylato; QPR = 7‐[(pyridin‐4‐ylmethylene)‐amino]‐chromen‐2‐one), is presumably the first reported on coumarinyl‐pyridyl framework with terephthalato linker. The optical band gap, 2.91 eV, is obtained from the Tauc's plot that insists to fabricate an optically stimulated semiconducting device, and the electrical conductivity exhibited (Λ) is 8.07 × 10−3 S m−1 (dark) and 9.26 × 10−3 S m−1 (light). The cytotoxicity in the selected human cancer cell lines like HeLa, MDA‐MB 231, and HepG2 cells in relative to the normal kidney epithelial (NKE) cell line has been examined, and its efficacy is observed highest in inhibiting proliferation of HeLa cells (IC50, 21.02) compared with other cancer cells (IC50: 42.22 [HepG2] and 46.37 [MDA‐MB 231]). Further, the Zn(II)‐CP possess intracellular reactive oxygen species (ROS) generation and caspase‐3/7 activation leading to G2/M cell cycle arrest and apoptotic cell death in HeLa cell line. This novel coumarinyl‐pyridyl ligand appended Zn(II)‐CP has been employed for the fabrication of semiconducting device, which is quite impressive in view of existing energy crisis civilization; in addition, the compound has excellent bio‐activity.

Development of electrical conductivity-based photosensitive switching devices using metal complexes with Schiff base ligands

“…Paul et al reported interesting electrical properties of a newly synthesized two dimensional Zn( ii )-based coordination polymer, [Zn 2 (BDC) 4 (QPR) 2 (H 2 O)] n ( 25 ) (where, H 2 BDC represents 1,4-benzenedicarboxylic acid and QPR represents 7-[(pyridin-4-ylmethylene)-amino]-chromen-2-one). 70 According to the authors, this coordination polymer was apparently the firstly reported coumarinyl-pyridyl molecular architecture containing a terephthalate moiety as a linker. With the help of the Tauc plot, the authors measured the optical band-gap and it was reported as 2.91 eV.…”

Coordination polymers: a promising candidate for photo-responsive electronic device application

“…The electrical property and I – V characteristics have been measured with the fabricated device form the corresponding CP, which revealed that the conductivity has been enhanced upon exposure to light at room temperature (DC conductivity: dark, 8.07 × 10 −3 S m −1 and light, 9.26 × 10 −3 S m −1 ). 83…”