Polyoxometalate-based metal–organic supramolecular architectures derived from two new pyrimidine-amide ligands as supercapacitors and multifunctional electrochemical sensors

Abstract

Two new polyoxometalate (POM)-based metal-organic supramolecular architectures, [Cu(Hpypa)2(PMo12O40)(μ2-Cl)]·3H2O (1) and [Co(H2bpap)(γ-Mo8O28)0.5(H2O)2]·H2O (2), were successfully synthesized by using two self-designed pyrimidine-amide organic ligands [N-(pyridin-3-ylmethyl)pyrimidine-4-carboxamide (pypa) and N,N'-bis(4-pyrimidinecarboxamido)-1,5-pentane (bpap)], as well as...

Construction of Four γ-Octamolybdate-Based Coordination Polymers Using Linear Nitrogen Heterocyclic Ligands for Proton Conduction

“…All eight Mo atoms are surrounded by six O atoms, forming distorted octahedra, and they are arranged into a typical γ-[Mo 8 O 28 ] 8– octamolybdate structure by sharing the edges. To the best of our knowledge, such γ-octamolybdate structures have been rarely reported. , …”

“…Among them, the octamolybdate [Mo 8 O 26 ] 4– polyoxoanion has been widely investigated due to its significance in various applications, and several isomeric forms of this polyoxoanion have been prepared to date, including the α-, β-, and γ- isomers, etc. − The difference among them depends on the different numbers of [MoO 4 ], [MoO 5 ], and [MoO 6 ] units, as well as the connection modes among the O atoms. − Notably, as a derivative of [Mo 8 O 26 ] 4– , the cluster [Mo 8 O 28 ] 8– has been reported. − In both [Mo 8 O 26 ] 4– and [Mo 8 O 28 ] 8– units, a substantial number of terminal and bridging oxygen atoms exist, which provide more possibilities to link with metal ions and form hydrogen bonds as donors and acceptors. − Therefore, they are excellent candidates for the assembly of POM-based coordination polymers. However, compared to the typical [Mo 8 O 26 ] 4– polyoxoanion, the coordination polymers built up from [Mo 8 O 28 ] 8– are less frequently reported. , …”

Six polyoxotungstate-based transition metal compounds for electrochemical capacitor application and a comparative analysis of factors affecting capacitances

“…Therefore, POM-TMCs can combine the merits of POMs and TMCs and show high specific capacitance, electrical conductivity and stability when used as capacitive materials. 42–45…”

A Novel VW12 POMCPs with π‐π Stacking and Honeycomb 2D Network Structure Accommodated by MXenes as High‐Performance Supercapacitors Negative Electrode

“…[14] Generally, POMs rich in redox reactions and nitrogen-containing organic ligands can achieve controlled improvement in the supercapacitor performance of POMCPs materials. [15] Although the cycle stability of POMCPs based during cycle charging and discharging. Thus, POM-based POMCPs is still a sustainable research field in coordination chemistry.…”

“…Therefore, POMCPs has found wide applications in the energy field, especially in supercapacitors [14] . Generally, POMs rich in redox reactions and nitrogen‐containing organic ligands can achieve controlled improvement in the supercapacitor performance of POMCPs materials [15] . Although the cycle stability of POMCPs based during cycle charging and discharging.…”