Abstract
The design and synthesis of organic high-temperature reversible thermochromic materials is one of the difficult issues in the field of organic chromic materials.In this paper,four diacetylene monomers named DBA-PCDA,TBA-PCDA,DBE-PCDA and TBE-PCDA,each containing multiple diacetylene units,were synthesized from 10,12-pentacosadiynoic acid(PCDA)through the amidation or esterification reactions,using 4,4'-diaminobiphenyl,1,3,5-tris(4-aminophenyl)benzene,4,4'-dihydroxybiphenyl,and 1,3,5-tris(4-hydroxyphenyl)benzene as bridging units.The effects of functional groups that can form hydrogen bond and π-π interactions on the solid-state polymerization properties of monomers and the thermochromic properties of the corresponding PDAs were investigated.The results show that only DBA-PCDA and TBA-PCDA,which contain functional groups that can form hydrogen bonding interactions,can be polymer-ized under 254-nm UV irradiation.The corresponding poly(DBA-PCDA)exhibits reversible thermochromic property even heated up to 200 ℃,showing a potential application in the field of high-temperature thermal indicator above 100 ℃.This work provides a new perspective to the development of PDA with high-temperature reversible thermochromic property.
维普
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