A giant hybrid organic–inorganic octahedron from a narrow rim carboxylate calixarene
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2020
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Here we discovered an unprecedented giant octahedral coordination compound bearing 16 Zn2+, 12 Na+, 8 O2−, 4 OH−, 13 H2O and 6 L4− ligands [L4− = fully deprotonated tetra(carboxymethoxy)calix[4]arene]. Its structure was elucidated by single-crystal X-ray diffraction, wavelength-dispersive X-ray spectroscopy and MALDI-TOF mass spectrometry. This compound, Zn8Na6L6⊃Zn8Na6O8(OH)4(H2O)13 (external⊃internal), has eight tetrahedral zinc ions forming the coordination vertices of an outermost cube where carboxylate groups from the sodium calixarenes are anchored. Its core consists of eight Zn2+, six Na+, eight O2−, and four OH− distributed over three layers, besides thirteen coordinated H2O molecules.
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SANTOS, Fernando Machado dos et al. A giant hybrid organic-inorganic octahedron from a narrow rim carboxylate calixarene. Chemical Communications, [s. l.], v. 56, n. 95, p. 15024-15027, 2020. DOI: 10.1039/D0CC07043B.Disponível em: https://pubs.rsc.org/en/content/articlelanding/2020/CC/D0CC07043B. Acesso em: 28 jun. 2023.