Synthesis, structure and photocatalytic properties of coordination polymers based on pyrazole carboxylic acid ligands

Abstract

Three new compounds, namely, [Mn(hpcH)(H2O)2]•H2O (1), [Cd(hpcH)(DMF)(H2O)] (2), [Cu(hpcH2)2(H2O)2] (3), (hpcH3=5-hydroxy-1H-pyrazole-3-carboxylic acid), were solvothermally synthesized and characterized in detail. Compounds 1 and 2 are coordination polymers (CPs), exhibit two-dimensional (2D)...

A highly efficient lanthanide coordination polymer luminescent material for the multi-task detection of environmental pollutants

“…The relevant research of CPs with similar polycarboxylic acids based on pyrazole has confirmed the above viewpoint. 29–39…”

“…In order to realize efficient emission for the purposes of environmental application, a potential strategy is to introduce a suitable organic ligand that can shield Ln 3+ cations from water molecules and allow them to emit their characteristic luminescence via the so-called "antenna effect". [25][26][27][28][29][30][31][32] Therefore, we designed a new π-conjugated N-heteroaromatic organic linker (Scheme 1), namely 3-(carboxymethoxy)-1-(carboxymethyl)-pyrazole-4-carboxylic acid (H 3 ccpc), for further synthesis of Ln-CPs. This ligand linker is characteristic of many forms of chelating coordination donors for lanthanide cations, which are favorable for shielding lanthanide cations from solvent molecules.…”

“…The relevant research of CPs with similar polycarboxylic acids based on pyrazole has confirmed the above viewpoint. [29][30][31][32][33][34][35][36][37][38][39] Based on the above consideration, we designed and synthesized a novel pyrazole carboxylic acid compound (H 3 ccpc). It was employed as an organic ligand to self-assemble with Ln 3+ ions, and a novel Ln-CP was successfully obtained, namely, {[Tb 2 (ccpc) 2 (H 2 O) 6 ]•1.5H 2 O} n (ccpcTb).…”

Construction of Novel Coordination Polymers Based on Pyrazole Carboxylic Acid and Doping for Enhancing the Photocatalytic Property Under Visible Light

“…The H 2 cmpc organic ligand is a N , O -donor mixed multidentate linker, which possesses flexible methylene carboxyl and rigid pyrazolyl bifunctional groups. Since its two carboxyl groups can be fully or partially deprotonated, it can adopt different coordination modes through multiple coordination sites and, thus, construct CPs with interesting aesthetic architecture structures. , Furthermore, the pyrazolyl group has a light illumination absorption performance that can improve the photocatalytic properties of CPs.…”

Promoting the Oxygen Evolution Reaction via Morphological Manipulation of a Lamellar Nanorod-Assembled Ni(II)-Pyrazolate Superstructure

“…As far as electrocatalysts are concerned, CPs can be utilized in a variety of ways: (1) CPs as catalyst precursors to fabricate nanostructured metal-based catalysts by high-temperature calcination and (2) directly utilizing CPs with high activity as catalysts. , The carboxylates and azolate ions are currently among the most propitious ligands to produce CPs, as they play a major role in their chemical stabilization by strengthening the coordination bonds via stabilizing the metal ions at higher oxidation states. Ni-based CPs have attained great momentum due to their exceptional electrical properties and anticipated synergistic effects with conforming heteroatoms, which can significantly modify the surface attributes of the materials supporting electrocatalysis. − …”