有机---无机导电聚合物膜的研究

Abstract: Organic/inorganic conductive polymer films possess many special properties which have tempting prospect for applications in energy, electrode materials, photoelectron devices, sensors, etc. They are not only one of the most popular research areas, but also the subject of the pan molecule research in the contemporary era. The objective of this project is to design various types of hybrid organic/inorganic conductive polymer films through doping polyoxometalate with polymers and to study their conductivity and conductive mechanism. The following results have been obtained:（1）Three series of organic/inorganic hybrid super-thin solid orderly films have been successfully prepared on the interface of air/water by using LB technique, based on use of poly (1,2-dihydro-2,2,4-trimethyl)quinoline(PQ), polyvinyl carbazole(PVK), N,N'-dimethyldioctadecyl amine bromide(DODA) surfactant, and n-octadecylamine(OA) as film forming material, and use of aqueous polyoxometalate(POMs) as subphase..（2）The surface appearance of PQ and PQ/POMs monolayer films on the ITO conductive glass, I-V curves, and conductive mechanism have been obtained by atom force microscopy (AFM) and scanning tunneling microscopy(STM). It was found that the diameter of the monolayer film increased by 42 nm after incorporating POMs. The current response value of the hybrid film was larger than that of unhybrided film in the range of 0-1V. Furthermore, the current response value was larger in applying positive voltage than in applying negative voltage. During the process of incorporating POMs, PQ was oxidized. Carbon cations and radicals were then produced on the polymer chains. These cations and radicals are able to move along the conjugate chain in the electric field, thus bringing the polymer conductive property.（3）The fluorescence and structure of the hybrid film has been studied. At first, the fluorescence of PQ and PQ/ODA/POMs multilayer LB films have been examined by using fluorescence spectrum. It was found that at excitation wavelength of 300 nm to 400 nm, unincorporated PQ did not produce any fluorescence signal. However, PQ/OA/POMs multilayer LB membranes exhibited fluorescence emission peaks of different intensity, the position of which changed with hybridpolyanions and layers of film. The results of π-A curves and LAXRD indicated that alternately organic/inorganic laminar structure has been formed in the PQ/POMs and PQ/ODA/POMs films.This project has achieved remarkable success. Six papers were published in the journals, such as Frontiers of Solid State Chemistry, Journal of Chemistry (in Chinese), Chemical Journal of Chinese Universities, Journal of Inorganic Chemistry (in Chinese), etc. Three doctoral dissertations will be finished this year, part of which is to be submitted to the journal Thin Films. In addition, the research has been presented in the symposiums of inorganic chemistry, nanometer chemistry and coordinate chemistry, and IHSISC-2000 international meeting.

研究以杂多蓝锂作掺杂剂的本征态聚喹啉导电聚合物,用IR.UV-Vis.CV.SEM.ESR.X--射线衍?电导率测量等研究聚合物膜的导电性.微观形貌及结构,氧化还原特性与电化学稳定性,及嫉缁?考察聚合物条件(电解液.电位.电流.温度)对导电性能的影响,及二次锂电池的导电特性,为研制与应用新型二次电池的导电材料提供理论和实验依据.