Studies on Oxidative Polymerization of Thiophene Derivatives
|Course||Chemical Engineering and Technology|
|Keywords||Polythiophene derivatives Chemical oxidative polymerization Fe3 oxidant Electrochemical properties|
In this thesis, using three different Fe3 oxidant ( Fe (ClO4 ) 3 , FeCl3, Fe2 (SO4 ) 3 ) , were prepared by chemical oxidation method poly terthiophene derivatives : poly-3 ' , 4' - ethylenedioxy -2 , 2 ': 5', 2 \PTT), to study the oxidant species on the polymer structure and performance ; chemical oxidation and metal complexes catalyzed the legal system poly two thiophene thiophene were prepared , research the different chemical synthesis method on the poly thiophene structure and performance ; in Fe ( ClO4 ) 3 oxidation explore the amount of oxidant , reaction temperature , reaction time of these four polymer structure and performance of the key findings are as follows : 1 . using three different Fe3 oxidant ( Fe (ClO4 ) 3, FeCl3, Fe2 (SO4) 3), were prepared by chemical oxidation method a good electrochemical properties of poly - 3 - thiophene derivative : poly-3 ' , 4' - ethylenedioxy -2,2 ': 5 ' , 2 \- trithiophene (PTET), polyethylene 5,7 - bis ( 2 - thienyl -yl) thiophene [3,4-b] and [1.4] diazine (PTPT), poly trithiophene (PTT), the results showed that : Fe (ClO4 ) 3 on the TET and TPT have better oxidation and doping effect , FeCl3 has better oxidation and doping effect of TT . Fe (ClO4) 3 as an oxidant to explore the amount of catalyst , reaction temperature , reaction time of PTET and PTPT of structure and performance , FeCl3 as the oxidant to investigate the reaction temperature , reaction time impact on the the PTT structure and performance . The results showed that: when the monomer with the oxidizing agent , the molar ratio of 1:4, and the reaction temperature was 18 ° C , the reaction time was 12 h, the polymer has better conductive conjugated structure and electrochemical properties , PTET, PTPT, PTT rates were : 1.47,1.95 × 10-2,7.89 × 10-4 S / cm, specific capacitance , respectively : 133,115,98 F / g . Metal complex catalysis and chemical oxidation were prepared eigenstates and the doped poly thiophene study the impact on the structure and properties of poly thiophene different chemical synthesis method . The metal complexes poly dithiophene catalyzed prepared , having a regular connection , but conjugated low level , electrochemical performance is poor . Fe (ClO4) 3 oxidation synthesis of poly dithiophene , when bithiophene with the oxidant , a molar ratio of 1:4 , poly dithiophene having preferably a conjugated structure and electrochemical properties , and electric conductivity was 0.17 s ? Cm -1 specific capacitance of 133 F / g.