Fabrication And Properties Of Conducting Polymers Based On Poly(3,4-Propylenedioxythiophene)

Conducting polymer was a new material with good conductivity and machinability.Conducting polymer has good application prospects and enormous commercial value.As a representative of conducting polymers,Poly?3,4-ethylenedioxythiophene??PEDOT?,has simple molecular structure,narrow energy gap and high conductivity.PEDOT has been widely used as organic film solar cell materials,supercapacitor materials,electrochromic materials,sensor materials.But in the practical application,PEDOT film appeared many problems:1)As supercapacitors,PEDOT is hard to be prepared into free-supporting film,2)As electrochromic films,The color of PEDOT was monotonous,3)As chiral sensor material,when chiral functional group were introduced into the ethylene bridge groups of PEDOT,PEDOT derivatives will have an extra chiral center.3,4-propylenedioxythiophene?ProDOT?was prepared by the propylene bridge groups take place of the ethylene bridge groups of EDOT.ProDOT derivatives are more conducive for doping.The electrochromic materials with higher contrast and richer color can be obtained by preparing ProDOT derivatives.When introducing chiral groups into the propylene bridge groups of ProDOT,ProDOT derivatives cannot generate extra chiral center.ProDOT derivatives without extra chiral center is benefit to improve the efficiency of chiral recognition.In this paper,five ProDOT derivatives were synthesized.PProDOT derivative films were synthesized via potentiostatic polymerization.Capacitance,electrochromic and chiral sensing properties of PProDOT derivative films were studied.1.A polymer nanowire PProDTM was prepared by template-free electropolymerization.Different electrolytes influence the capacitor performance of PProDTM films.A simple solid capacitor device based on PProDTM was fabricated.In ACN containing 0.1 M Bu₄NBF₄,a symmetrical supercapacitor based on PProDTM exhibited specific capacitance of 99.6 F g^-11 at a current density of 1.0 A g^-1.Supercapacitor based on PProDTM exhibited good stability.Supercapacitor based on PProDTM connected in series could light LED light.2.The electrochemical behavior and electrochromic properties of PProDTM and ProDTM-EDOT copolymers were investigated.PProDTM can achieve reversible conversion from light blue to purple.Transmittance of PProDTM was 43.6%at 580nm.ProDTM-EDOT copolymer can achieve reversible conversion from light blue to dark blue,and has faster response time and higher coloring efficiency.3.A pair of ProDOT derivatives with a single chiral center were synthesized using?R?-/?S?-phenylpropionic acid as chiral group.The enantioselective recognition between chiral PProDTM-PP modified glassy carbon electrodes and chiral DOPA was studied by using different electrochemical technologies.?R?-PProDTM-PP and?S?-PProDTM-PP showed higher peak current responses toward D-DOPA and L-DOPA,respectively.Furthermore,the recognition efficiencies of chiral PProDTM-PP are between 1.48 and 1.89,which is higher than chiral PEDOT based electrochemical sensors?around 1.10?.4.A pair of amino-functionalized chiral 3,4-propylenedioxythiophene?ProDOT?derivatives,chiral?3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepin-3-yl?methyl2-[?tert-butoxycarbonyl?amino]-3-phenylpropanoate?ProDOT-Boc-Phe?,were synthesized to prepare chiral monomer with single chiral center and higher stereospecificity.The enantioselective recognition between chiral PProDOT-Boc-Phe modified glassy carbon electrodes and DOPA enantiomers was achieved by different electrochemical technologies.?D?-PProDOT-Boc-Phe and?L?-PProDOT-Boc-Phe showed higher peak current responses toward L-DOPA and D-DOPA,respectively.