文摘
Two new chemically stable functional crystalline covalent organic frameworkds (COFs) (Tp-Azo and Tp-Stb) were synthesized using the Schiff base reaction between triformylphloroglucinol (Tp) and 4,4鈥?azodianiline (Azo) or 4,4鈥?diaminostilbene (Stb), respectively. Both COFs show the expected keto-enamine form, and high stability toward boiling water, strong acidic, and basic media. H3PO4 doping in Tp-Azo leads to immobilization of the acid within the porous framework, which facilitates proton conduction in both the hydrous (蟽 = 9.9 脳 10鈥? S cm鈥?) and anhydrous state (蟽 = 6.7 脳 10鈥? S cm鈥?). This report constitutes the first emergence of COFs as proton conducting materials.