Crystal Structure, Spectroscopy and Photocatalytic Properties of a Co(II) Complex Based on 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic Acid

Abstract

A novel cobalt(II) complex, namely [Co(tpa) 2 (H 2 O) 4 ]·2H 2 O (1) (Htpa = 5-(1,2,4-triazol-1-yl)pyridine-3-carboxylic acid) has been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 was further characterized by elemental analysis, FTIR spectrum, electronic spectrum, X-ray powder diffraction and thermal gravimetric analysis. Structural analysis shows that complex 1 was stabilized via π···π stacking and hydrogen bonding interactions to give a 3D supramolecular framework. Hirshfeld surface analysis showed that O···H (29.5%), H···H (23.8%), N···H (21.5%) and π···π (8.6%) intermolecular contacts are the most important interactions in the crystal of 1. In addition, the synthesized Co(II) complex showed favorable photocatalytic activity for the degradation of methyl orange (MO) under UV light at room temperature. The degradation process of MO was in accordance with the first-order reaction kinetics, and the t 1/2 for the reaction is 27.3 min, and the apparent rate constant is k = 2.54 × 10 −2 min −1 .

Solid‐State Characterization of Acetylpyridine Copper Complexes for the Activation of H2O2 in Advanced Oxidation Processes

“…al . synthesized a copper complex derived from pyridinecarboxylic acid and copper(II) nitrate in which the coordination sphere of the ion was the same as the one obtained in this work [35,36] . This could indicate that when the metal complex is obtained from copper(II) nitrate in the presence of pyridine derivatives, only two heterocyclic rings are able to coordinate with the metal.…”

Synthesis of Copper Oxide Nanoparticles on Activated Carbon for pollutant removal in Tartrazine structure

“…The major environmental pollution source is the discharge of dye-containing wastewater from cosmetics, textiles, food, plastic, and paper industries [1][2][3][4][5]. These residual dyes present in the wastewater endanger the life of fish as well as other organisms.…”

“…Moreover, these substances absorb sunshine resulting in photosynthesis prevention and an adverse impact on the natural aquatic ecosystem. As a result of their complex structure and high molecular weight, the degradation of organic dyes is usually difficult [1][2][3]. Different approaches, such as membrane separation, oxidation, flocculation, coagulation, and adsorption, have been proposed for the removal of these dyes [4][5][6].…”