| Summary: | 博士 === 國立中興大學 === 化學系所 === 94 === Self-organized one-dimensional supramolecular nanostructures have potential applications that include molecular electronics, photonics, and molecular magnets. Therefore, understanding how molecular architecture is controlled by functional building unit in self-assembly process will enable the design of increasingly well-ordered nanoarrays with unique physical properties.
Herein, we report a series of one-dimensional supramolecular materials with π-functionality by introducing porphyrin and 1, 10-phenanthroline as aromatic units under hydrothermal techniques. The present thesis is devoted into two parts. First, a family of porphyrin-based supramolecular 1-D wires, tetragonal planar 1, tetragonal nonplanar 2 and hexagonal packing 3 have been explored as self-assembled organic solids. Due to the well-defined p-p stacking architectures, these porphyrin arrays reveals diverse optical and electronic properties. Encapsulation of conducting polyaniline filaments in the channels of 1 enables the material to be capable of mediating hybrid electronic/ionic conduction leading to the development of lithium-battery materials.
Second, we describe the magnetization of a π-functional sheet-like structure composed of infinite one-dimensional iron-oxalate coordination chains that comprise alternating Δ- and Λ-iron(II) assembled building units, [FeII(Δ)FeII(Λ)(ox)2(Phen)2]n (4). The π-π scaffolding framework reveals spontaneous magnetization that give rise to pronounced hysteresis loops below transition temperature(Tm = 8.6K). The hysteresis loop taken at 1.9 K shows a large coercive field as great as 1.4 T, which is significantly larger than that reported for analogous oxalate-based magnetic compounds.
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