Proton conductive ionic liquid crystalline poly(ethyleneimine) polymers functionalized with oxadiazole.

ABSTRACT: Two novel series of ionic liquid crystal polymers that display proton conductive properties are presented here. These materials are based on linear (l-PEI) or branched (b-PEI) poly(ethyleneimine) functionalized with unsymmetrical oxadiazole carboxylic acids derived from 1,3,4-oxadiazole (1,3,4-OXA _m ) or 1,2,4-oxadiazole (1,2,4-OXA _m ). The subscript "m" indicates the length of the spacer between the rigid moiety and the carboxyl group, namely m = 4 and 10. The occurrence of proton transfer from the carboxylic acid to the amine groups was confirmed by FTIR and NMR measurements. The liquid crystalline properties were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffract

SUBMITTER: Concellon A 

PROVIDER: S-EPMC9089445 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature