he difference of cis -and trans-polyazoniethines were investigated using SCF- LCAO-MO AMl and CNDO '2-CO methods. Energy band structures and charge distribution of different isomers were obtained. The formation o...he difference of cis -and trans-polyazoniethines were investigated using SCF- LCAO-MO AMl and CNDO '2-CO methods. Energy band structures and charge distribution of different isomers were obtained. The formation of C-H -N hydro- gen-bonds in the polymers and different contribution to cis-, trans -isomer stability have been systeniatically analysed in theory. The difference of electronic propcrties before and after the formation of hydrogen-bond were intensively studied.展开更多
1 Introduction Polyazomethines （PAM）, as a new kind of organic conductive polymer, have been paid much attention to and will be widely applied in many fields in the future, e. g. battery anodes or cathodes, semicond...1 Introduction Polyazomethines （PAM）, as a new kind of organic conductive polymer, have been paid much attention to and will be widely applied in many fields in the future, e. g. battery anodes or cathodes, semiconductor materials in spacecraft technology, energy storage, conversion devices, and in integrated electroptics for switching, logic and display. Recently, with the improvement of synthesis methods, many polyazomethine polymers with different structures have been obtained. The typical one is[R—HC = N—R’—N = CH], the experimental conductivity of which is over 10<sup>-2</sup> S<sup>-1</sup>·cm<sup>-1</sup>. The introduction of ni-展开更多
The oligo（azomethine ether）s were synthesized via polycondensation of alkyl diamines with aromatic dialdehydes. Two series of dialdehydes, namely 2,2＇-[1,2-phenylenebis（methyleneoxy）]dibenzaldehyde [2,2＇-1,2-（P...The oligo（azomethine ether）s were synthesized via polycondensation of alkyl diamines with aromatic dialdehydes. Two series of dialdehydes, namely 2,2＇-[1,2-phenylenebis（methyleneoxy）]dibenzaldehyde [2,2＇-1,2-（PBMODB）] and 2,2＇- [1,4-phenylenebis（methyleneoxy）]dibenzaldehyde [2,2＇-I,4-（PBMODB）] were prepared from the condensation reactions of salicylaldehyde with o-xylenedibromide and p-xylenedibromide, respectively. The structures of dialdehydes and oligomers were determined by FT-IR, 1H-NMR and 13C-NMR. The thermal analyses of oligomers were conducted by DSC and TG/DTA techniques, respectively. Size exclusion chromatography （SEC） technique was also used to determine molecular weights and molecular weight distributions of oligomers. Electrochemical properties of the synthesized products were investigated.展开更多
文摘he difference of cis -and trans-polyazoniethines were investigated using SCF- LCAO-MO AMl and CNDO '2-CO methods. Energy band structures and charge distribution of different isomers were obtained. The formation of C-H -N hydro- gen-bonds in the polymers and different contribution to cis-, trans -isomer stability have been systeniatically analysed in theory. The difference of electronic propcrties before and after the formation of hydrogen-bond were intensively studied.
基金Project supported by the National Natural Science Foundation of China.
文摘1 Introduction Polyazomethines （PAM）, as a new kind of organic conductive polymer, have been paid much attention to and will be widely applied in many fields in the future, e. g. battery anodes or cathodes, semiconductor materials in spacecraft technology, energy storage, conversion devices, and in integrated electroptics for switching, logic and display. Recently, with the improvement of synthesis methods, many polyazomethine polymers with different structures have been obtained. The typical one is[R—HC = N—R’—N = CH], the experimental conductivity of which is over 10<sup>-2</sup> S<sup>-1</sup>·cm<sup>-1</sup>. The introduction of ni-
文摘The oligo（azomethine ether）s were synthesized via polycondensation of alkyl diamines with aromatic dialdehydes. Two series of dialdehydes, namely 2,2＇-[1,2-phenylenebis（methyleneoxy）]dibenzaldehyde [2,2＇-1,2-（PBMODB）] and 2,2＇- [1,4-phenylenebis（methyleneoxy）]dibenzaldehyde [2,2＇-I,4-（PBMODB）] were prepared from the condensation reactions of salicylaldehyde with o-xylenedibromide and p-xylenedibromide, respectively. The structures of dialdehydes and oligomers were determined by FT-IR, 1H-NMR and 13C-NMR. The thermal analyses of oligomers were conducted by DSC and TG/DTA techniques, respectively. Size exclusion chromatography （SEC） technique was also used to determine molecular weights and molecular weight distributions of oligomers. Electrochemical properties of the synthesized products were investigated.
