High-Symmetry Co/Ni Triazine Polycarboxylate Diverse Frameworks Constructed by M_x(COO)_y Building Blocks: Characterization and Catalytic Performance Evaluation of p-Nitrophenol

Abstract

Three new triazine compounds [Co 1.5 (H 3 TDPAT)-(H 2 O) 3 ]•6H 2 O (1), [Co 2 (TCPT)(μ 2 -H 2 O) 2 ]•OH (2), and [Ni 3 (TCPT)]•3OH (3) were designed and synthesized via the reaction of the symmetrical triazine ligand connected by C−N−C and C−O−C bonds with triazine poly(carboxylic acid)s ligands as the side arms:H 6 TDPAT (H 6 TDPAT = 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5triazine) and H 3 TCPT (H 3 TCPT = 2,4,6-tris(4-carboxyphenoxy)-1,3,5-triazine) as well as the corresponding metal salts under the solvothermal condition. Three triazine polycarboxylate frameworks were characterized by elemental analysis, infrared spectroscopy, ultraviolet spectroscopy, thermogravimetric analysis, X-ray powder diffraction, and solid fluorescent spectra in detail. The structural analysis results showed that the three-dimensional porous cage framework of compound 1 was constructed by three different polyhedral cages connected with [Co(COO) 4 (H 2 O) 2 ] building blocks. One of the compounds, 2, is formed by twin propeller Co 2 (μ 2 -H 2 O)(COO) 3 building blocks connecting two-dimensional layers and the intermolecular π−π interactions involved the triazine rings between the layers. While the structure of compound 3 is similar to that of 2, assembly is by Ni(COO) 3 building blocks and adjacent layers of the face-to-face π−π interaction between the triazine rings. In order to explore functional properties, the catalytic reduction of p-nitrophenol (PNP) of compounds 1−3 was investigated. They exhibit excellent catalytic activity of more than 95% for reduction of PNP with a dose of 2.5 mg of the compounds.

Construction of a triazine polycarboxylate Co-MOF with flexible and rigid coordination arms as well as excellent catalytic reduction and adsorption properties

“…Therefore, the skeleton of compound 1 was not destroyed during the catalytic process. On the other hand, in this work, the catalytic reduction process is described with reference to similar literature: 60,63 First, compound 1 oxidizes BH 4 − to BO 4 − , which is an oxidation reaction process, and electrons are produced. Secondly, for the electrons to be rapidly transferred to PNP through compound 1 , the reaction energy barrier is greatly reduced.…”

“…Therefore, the skeleton of compound 1 was not destroyed during the catalytic process. On the other hand, in this work, the catalytic reduction process is described with reference to similar literature: 60,63 First, compound…”

Quaternization of a Triphenylamine-Based Conjugated Porous Organic Polymer to Immobilize PtCl62– for the Photocatalytic Reduction of 4-Nitrophenol

“…One efficient approach to address this issue is utilizing suitable porous supports to anchor MNPs, which increases their dispersity in the whole supports to avoid the formation of larger nanoparticles; thus, the development of suitable supports is of paramount significance. Up to now, various supports including inorganic materials, , metal–organic frameworks, − organic molecular cages, − etc. have been developed, but these supports are still restricted owing to the weak interaction between supports and MNPs, which decreases the chemical stability of the photocatalyst. − Moreover, another point most previous works have ignored is whether the introduction of support has broadened the light absorption region and improved the light absorption ability of the photocatalyst, which also highly influences the final conversion efficiency.…”

Stable and efficient planar Cu/Cu2O film catalysts

“…Non-precious transitional metals such as Ni, Fe, Mn and Cu that are abundant in nature are good candidates for dealing with p-NP reduction reactions. [40][41][42][43] In this case, Cu 2 O nanomaterials and Cu hetero-junction materials have been prepared for the degradation of p-NP with remarkable performance. 44 Cu-based materials are excellent electrocatalysts for CO 2 electroreduction, such as the nanograin morphology reported recently.…”