在本篇報告中合成了一個具腙基架橋的萘啶配位子，並與銀離子形成錯合物，利用1-D NMR、COSY、HMBC、HSQC等方法，成功的鑑定出配位子以及錯合物的結構。在UV-Vis吸收光譜中發現配位子與錯合物的π→π*有明顯位移，螢光波長在510 nm。且從UV-vis滴定光譜中，得到錯合物的自組裝過程為[L]、[ML]、[M2L]、[M3L]、[M3L2]、[M4L2]、[M5L2]、[M6L2]，並在ESI-MS質譜儀中確認[M6L2]的存在。此外利用電子吸收光譜酸鹼滴定，求得萘啶配位子之pKa為3.83。 Metallosupramolecules have been extensively studied due to their supramolecular behavior with properties supplemented by the metal ions, such as electronics, magnetism, color, or electrochemical behavior. Moreover, metalloupramolecules have been utilized to fabricate metal nanomaterials and molecular machine because of their ability to self-assemble into ordered suprastructures. A novel polydentate ligand L was synthesized by condensation of 2,7-dihydrazinyl-1,8-naphthyridine and 2-dimethylglyoxal-hydrazonyl- naphthyridine. Reaction of L ligand strands with silver perchlorate in CH3CN generates a double helical hexanuclear complex. The ligands and silver complex were successfully identified by 1H-NMR and 2-D NMR technical as COSY, HMBC and HSQC. The complexation behavior of L was studied by UV-Vis spectrophotometric titration. The experimental results reveal the formation of hexanuclear complexes [Ag6L2]+6. Moreover, the double-helical structure of [Ag6L2]+6 was confirmed by electrospray ionization mass spectrometer. The pKa value of ligand L was determined by UV-Vis spectroscopic titration.
