详细信息    查看全文

• 作者：Tatiana V. Mitkina ; Maxim N. Sokolov ; Dmitry Y. Naumov ; Natalia V. Kuratieva ; Olga A. Gerasko ; Vladimir P. Fedin
• 刊名：Inorganic Chemistry
• 出版年：2006
• 出版时间：August 21, 2006
• 年：2006
• 卷：45
• 期：17
• 页码：6950 - 6955
• 全文大小：170K
• 年卷期：v.45,no.17(August 21, 2006)
• ISSN：1520-510X

文摘

The unprecedented selective encapsulation of trans-[Co(en)₂Cl₂]⁺ from the mixture of trans and cis isomers intothe cavity of macrocyclic cavitand cucurbit[8]uril (C₄₈H₄₈N₃₂O₁₆, CB[8]) leads to the inclusion compound {trans-[Co(en)₂Cl₂]@CB[8]}Cl·17H₂O (1). Single-crystal X-ray analysis, ¹H NMR, and ESI-MS spectra confirm the formationof host-guest complex 1 in both solid state and solution. The geometry of the complex cation alters significantlyupon inclusion, which causes appreciable hypsochromic shifts of the absorption bands of the guest complex. Accordingto TGA data, inclusion of trans-[Co(en)₂Cl₂]⁺ dramatically stabilizes the complex toward thermal decomposition.Encapsulation of trans-[Co(en)₂Cl₂]⁺ into the CB[8] cavity also increases the stability of the metal complex towardisomerization into the cis form. The supramolecular adduct {cis-[Co(en)₂(H₂O)₂](CB[8])₆}Cl₃·ca109.5H₂O (2) wasisolated only after prolonged heating of an aqueous solution of 1 at 120 C in an evacuated tube; it was characterizedby X-ray crystallography, IR, and elemental analysis.