A Semiconducting Copper(II) Coordination Polymer with (4,4) Square Grid Topology: Synthesis, Characterization, and Application in the Formation of a Photoswitch

Abstract

A phenoxo and end-to-end thiocyanate bridged copper­(II) coordination polymer (CP), [Cu2L2(μ-1,3-SCN)2] n , where HL is an potential tetradentate N2O2 donor Schiff base ligand, 2-(2-(ethylamino)­ethylimino)­methyl)-6-ethoxyphenol, has been synthesized and characterized. The band gap, bulk capacitance, electron lifetime, relaxation time, dielectric constant, and DC conductivity of the complex in the solid state have been studied. Variable temperature magnetic susceptibility measurement indicates the presence of weak antiferromagnetic interactions among the copper­(II) centers with J = −0.97 cm–1. The complex shows increase in conductivity when illuminated with visible light (photosensitivity ∼2.833).

Two Geometrical Isomers of a 1D Coordination Polymer: Rationalization by Theoretical Calculations and Variation of Electrical Properties with the Change in Binding Mode of Dicarboxylate Linker

“…As a result, the mobility of charge carriers is increased, which leads to the enhancement of the conductivity. Moreover, the organic ligand being rich in π-electrons may behave as an electron donor on photoexcitation, while the inorganic part (Cu­(II) and Cd­(II) metal centers) will act as an electron acceptor. − …”

Chirality‐Induced Variation in Interaction of Two Similar Copper(II) Coordination Polymers with Calf Thymus DNA: Exploration of Their Antimicrobial Activity and Cytotoxicity

“…These bands can be assigned to the stretching frequencies ν (C≡N) of the dicyanamide ligand, linked in a bidentate end‐to‐end mode . The bands around 3450 cm −1 in the IR spectra of both complexes are due to O−H bond stretching vibrations (Figure S3‐S4, ESI) …”

Carboxylato Bridged Cyclic SBUs as Robust Features in a Series of Cu(II) Coordination Polymers and Halogen···Halogen Interactions in Crystal Packing

“…Coordination polymers (CPs) have been widely studied materials and still continue to be a promising field of research in the realm of material science. − Synthesis of CPs has been principally important due to the ability to methodically fine-tune the dimensionality and structural flexibility by selecting appropriate metal ions or metal clusters and proper organic spacer ligands. − Designing of secondary building unit (SBU) mediated CPs is a subfield, where these SBUs are employed to enhance the functional properties of the CPs, especially to make them more rigid and thermally stable and increase the catalytic surface area. − Carboxylato bridged paddle wheel CPs have been widely explored for this purpose, although few other topologies of SBUs have also been utilized by different research groups. − In the present work, we present a carboxylato bridged dimeric Cu­(II) cyclic SBU (Scheme ), which appears to be a robust feature in a series of isophthalate bridged Cu­(II) CPs. These CPs have a disposition to be two-dimensional (2D) in nature having a brick-wall topology (Scheme ).…”