| Summary: | 碩士 === 國立高雄師範大學 === 化學系 === 101 === Part1
A series of 3-carbamoyl-1-(5-carboxypentyl)pyridin-1-ium salts with different anions (Br-, PF6-, BF4-, NO3-, BPh4- and OTf-.) have been synthesized and characterized by single crystal X-ray diffraction. The results demonstrate that the pyridinium salts form different building blocks to construct 8-shaped (Br-- ), triple helix (PF6- and BF4-), single strain helix (OTf- ) and wave-shaped (NO3-) structures via traditional N-H∙∙∙O and non-traditional C-H∙∙∙O hydrogen bonds. The effects on hydrogen bonding motifs, building blocks and structures by the six anion species with different hydrogen bonding acceptor abilities, sizes and shapes have been discussed.
Part2
A series of self-assembled bis(monoacylglycerol) nanospheres with intense blue and excitation-dependent visible fluorescence have been developed by the reaction of 3-carbamoyl-1-(5-carboxypentyl) pyridin-1-ium salts with bisphenol A epoxy resin via ring opening reaction. The excitation-dependent fluorescence behavior is caused by chromophores composed of hydrogen-bonded monoacylglycerol clusters, which are linked by an extensive hydrogen bonding network between the ester carbonyl groups and the protons of the alcohols with collective proton motion.
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