- 作者: 陳錦地 ; 謝始榮
- 作者服務機構: 中央研究院化學研究所
- 中文摘要: A series of "push-pull" porphyrins with 4-nitrophenyl and 4-aminophenyl substituents were synthesized and separated by flash column chromatographic techniques. They were fully characterized by elemental analysis, FAB-MS, FTIR, UV-visible, and /sup 1/ H NMR spectroscopies. The unsymmetrical .pi.-electron distribution of the porphyrins caused by the donor (amino) and acceptor (nitro) substituents were investigated by /sup 1/H NMR technique. The pyrrole-H resonance positions can be correlated to the Hammett .sigma. constants of the substituents. Although with strong donor and acceptor substituents, UV-visible spectra show the push-pull porphyrins have rather weak solvatochromism and hence limited intramolecular charge- transfer character.
- 英文摘要: --
- 中文關鍵字: Porphyrin; Unsymmetrical Porphyrin; Hammett Constant; Solvatochromism; Intramolecular Charge Transfer; Molecular First Hyperpolarizability
- 英文關鍵字: 紫質;不對稱紫質;Hammett常數;溶劑化顯色;分子內電荷轉移;分子第一過極化反應