Structural, Spectroscopic, Thermal, and Magnetic Properties of a New Dinuclear Copper Coordination Compound with Tiglic Acid

Abstract

The first coordination compound of copper and tiglic acid named tetrakis(μ-tiglato)bis(tiglic acid)dicopper(II) was synthesized and crystallized from water solution. Its structure was determined and analyzed based on X-ray diffraction measurement. The paddle-wheel coordination system of the investigated compound was compared with other similar copper structures known in the literature. The Hirshfeld analysis was used for the detailed analysis of intermolecular interaction. The new compound was also characterized in terms of infrared absorption, thermal, and magnetic properties. The antiferromagnetic coupling of copper ions was found.

Copper(II) 2,2-Bis(Hydroxymethyl)Propionate Coordination Compounds with Hexamethylenetetramine: From Mononuclear Complex to One-Dimensional Coordination Polymer

“…It confirms that the Cu•••Cu interactions have a nonbinding character [33]. The quantum-mechanical calculations reveal an antiferromagnetic coupling between copper atoms in both compounds, which is typical for the paddle-wheel copper carboxylate system [34][35][36].…”

Stimuli-Modulated Metal Oxidation States in Photochromic MOFs

“…For Cu 2.0 (BPMTC)­(DBTD), containing the diarylethene-based photoswitch, we performed both in situ and ex situ irradiation experiments, while monitoring the X-band frequency (9.382 GHz) in the EPR spectrum and, therefore, the possible conversion of paramagnetic (Cu­(II)) to diamagnetic (Cu­(I)) centers. In the dark, an axial signal (i.e., g x = g y ≠ g z )) was observed at a g -value of 2.062 for Cu 2.0 (BPMTC)­(DBTD) (Figure ) that could be assigned to monomeric Cu­(II) or thermally populated antiferromagnetically coupled Cu­(II). − The relative decrease in the EPR response was analyzed by double integration of the EPR spectra collected in the dark and under UV irradiation; then relative signal reduction (%) was estimated (see the SI for more details). Upon UV irradiation using the in situ approach for Cu 2.0 (BPMTC)­(DBTD), the Cu­(II) signal (260–335 mT) − decreased by 11%, which we attributed to photoswitch-induced Cu­(II) reduction (Figure S20).…”

In Situ Compensation Method for Precise Integral SQUID Magnetometry of Miniscule Biological, Chemical, and Powder Specimens Requiring the Use of Capsules

“…One of such very convenient bonding agents is the socalled GE varnish [31], which dissolves very easily in ethanol and works (bonds) down to the lowest temperatures. If the investigated material does not decompose or change its properties in ethanol, the investigated substance can be stabilized in the GE varnish and be affixed firmly to common sample holders, like rectangular pieces of semiconducting compound, and then mounted into plastic straws [32] or deposited on Si [25,33,34]. In all other cases, different, usually custom devised approaches had to be developed [35].…”