Organic Phosphonic Acid Coordination Polymers And Their Derivatives:Synthesis,Catalysis And Biosensing Research

Owning excellent structural stability and proton conduction,organic phosphonic acid coordination polymers are widely used in the fields of proton conduction,adsorption,separation,catalysis,and biosensing.However,due to the complex coordination modes and strong coordination ability of the organic phosphonic acid ligands,it is difficult to achieve the structural design and controlled synthesis of organic phosphonic acid coordination polymers.This paper focuses on the synthesis,catalysis and biosensing research of organic phosphonic acid coordination polymers and their derivatives.The design,preparation,structure and applications of organic phosphonic acid coordination polymers and their derivatives in hydrogen evolution reaction,oxygen evolution reaction and biosensor are studied.In this paper,there are two main aspects of work have been carried out:（1）Preparation of phytate-based organic phosphonic acid coordination polymer derivatives and their application in hydrogen evolution and oxygen evolutionSimulating the self-assembly of biological macromolecules,the organic phosphonic acid coordination polymer was prepared by self-assembly and metal ions were added to achieve high dispersion of metal.Phytic acid was used as organic phosphonic acid and was self-assembled by hydrogen bonding with melamine with using DMF as solvent.After the introduction of Co²⁺,a two-dimensional banded metal-organic phosphonic acid coordination polymer（MA-PA-Co）was formed by self-assembly.Subsequently,MA-PA-Co was pyrolyzed at 800℃to prepare N,P-doped carbon supported cobalt phosphide（Co₂P@NPC）catalyst.The prepared catalyst can be used for electrocatalytic hydrogen evolution reaction and oxygen evolution reaction.The electrocatalyst merely required an overpotential of 288 m V（for HER）in 0.5 M H₂SO₄solution and 476 m V for（OER）in 1 M KOH solution to deliver a current density of 10 m A cm^-2with great stability.（2）Preparation of organic phosphonic acid coordination polymer derivatives based on ATMP and its application in biosensorSimulating the structure and assembly of biological enzymes,a metal-organic phosphonic acid coordination polymer was formed by self-assembly of Co²⁺with amino-trimethylphosphonic acid（ATMP）as organic phosphonic acid ligand in methanol solution.Nitrogen-doped carbon loaded cobalt metaphosphate nanomaterial Co（PO₃）₂/NC was prepared by pyrolysis in nitrogen atmosphere.Biosensors based on Co（PO₃）₂/NC nanomaterials can be used for ultra-sensitive hydrogen peroxide（H₂O₂）detection.The linear range for the detection of hydrogen peroxide was 10-4000μM,the detection limit was 1.08μM（S/N=3）,and the sensitivity was 16.94μA·m M^-1·cm^-2.In summary,this paper has done a series studies on the design,synthesis,structural properties and applications of organic phosphonic acid coordination polymers and their derivatives,indicating that organic phosphonic acid coordination polymers and their derivatives have excellent performance in electrocatalysis and biosensing.