Supramolecular Chirality of Triphenylamine Derivatives Having Multiple Hydrogen Bondings
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Triphenylamine (TPA) derivatives are easily oxidized in chlorinated solvents under light irradiation due to the generation of chlorine radicals. Our previous study has shown the formation of TPA based chiral supramolecules with circularly polarized light (CPL). However, the supramolecular chirality did not have enough stability in solution and deteriorated gradually despite of the photo-polymerization of the self-assembled chiral supramolecules. In this study, triphenylamine derivatives having multiple hydrogen bondings (TPA-2a-SDA) were synthesized and their self-assembly behavior with CPL was investigated in chlorinated solvents. The supramolecules having increased number of hydrogen bondings showed the enhanced chiral stability.