| Summary: | 碩士 === 國立中央大學 === 化學研究所 === 95 === A three-component system (D-B-A system), consisting of a hydrogen bonding site (electron donor), a conjugated bridge and a reaction center (electron acceptor), is used to modulate the strength of hydrogen bonding. By altering the charge state of the reaction center, intramolecular charge transfer can be triggered and thus the binding ability of the hydrogen bonding site is modulated. Under the three-component system framework, we have studied two topics. The first one is the effects of metalation on the three-component systems. Both bidentate and tridentate metalation systems, which are constituted by pyridine- and phosphinine-containing ligands, have been examined. The second topic is to design a system in which two different types of π-conjugated bridges are attached to a TTF reaction center to achieve two-way remote control of the strengths of hydrogen bonds. Depending on the oxidation state of TTF, the strong hydrogen bonding site and the weak hydrogen bonding site can be exchanged.
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