Two novel molybdenum-oxide-based organic-inorganic hybrid frameworks exhibiting twofold interpenetrated hms networks

• Microporous interpenetrated frameworks based on polyoxometalates.
• 3D nets constructed from metal–organic layers pillared by the [Mo2O7]2 − anions.
• The first POM-based hybrid materials featuring twofold interpenetrated hms net.

Two novel polyoxometalate (POM)-based organic–inorganic hybrids, namely, [(CH3)2NH2][Co(tpba)(Mo2O7)]·2H2O (1) and [(CH3)2NH2][Ni(tpba)(Mo2O7)]·2H2O (2) (tpba = 4-([4,2′:6′,4′′-terpyridin]-4′-yl)benzoic acid), have been synthesized and characterized by elemental analyses, IR spectra, TG analyses and single-crystal X-ray diffraction. Compounds 1 and 2 are isostructural and feature microporous interpenetrated frameworks, which are constructed from metal–organic layers pillared by the [Mo2O7]2 − anions. Topologically, the overall structures of 1 and 2 can be classified as a rare (3,5)-connected twofold interpenetrated hms net, which has never been observed in POM-based hybrid materials prior to this work. Furthermore, the magnetic property of compound 1 are discussed.

Compounds 1 and 2 exhibit 3D microporous interpenetrated frameworks, which are constructed from metal–organic layers pillared by the [Mo2O7]2 − anions.Figure optionsDownload as PowerPoint slide