Paper: New Porous Crystals of Extended Metal-Catecholates

Authors: M. Hmadeh, Z. Lu, Z. Liu, F. Gándara, H. Furukawa, S. Wan, V. Augustyn, R. Chang, L. Liao, F. Zhou, E. Perre, V. Ozolins, K. Suenaga, X. Duan, B. Dunn, Y. Yamamto, O. Terasaki, and O. M. Yaghi

Citation: Chem. Mater., 2012, 24, 3511-3513

DOI: 10.1021/cm301194a

Abstract: To date, the links of robust and highly porous metal organic frameworks (MOFs) have been largely limited to carboxylate, imidazolate, other azolates, or sulfonate. Although catecholate organic units are well-known and are employed heavily for metal chelation in biology, only the simple 1,2,4,5-tetrahydroxybenzene (H6C6O4) or 1,4-dihydroxy-benzoquinone and their homologues (H2C6X2O4, e.g., X = Cl, Br, NO2 and CH3) have been explored and incorporated into extended frameworks. Herein, we describe linking the highly conjugated tricatecholate, 2,3,6,7,10,11-hexahydroxytriphenylene (H12C18O6, HHTP), with Co(II) and Ni(II) ions into two-dimensional porous extended frameworks. These new crystalline materials, termed metal-catecholates (M-CATs), were characterized by X-ray diffraction techniques (single crystal for Co-CAT-1, and powder for Ni-CAT-1) and high-resolution transmission electron microscopy (HR-TEM) studies (for Ni-CAT-1). We demonstrate their high chemical stability (in aqueous and non-aqueous media), thermal stability, and porosity. Cu-CAT-1 microcrystalline material showed high electrical conductivity and charge storage capacity.