Mix-Solvothermal Syntheses, Characterization, and Properties of New Zinc Diphosphonates with Zn-O-P Chains, Layers, and 3D Frameworks
文摘
Eight new zinc diphosphonates, [NaZn(O3P(CH2)2PO3H)] (1), [K2Zn2(HO3P(CH2)2PO3H)(O3P(CH2)2PO3)] (2), [(NH4)(H3N(CH2)2NH3)0.5Zn3(O3P(CH2)2PO3)2] (3), [(NH4)2Zn3(O3P(CH2)3PO3)2] (4), [(H3N(CH2)4NH3)0.5Zn(O3P(CH2)3PO3H)] (5), [KZn(O3P(CH2)4PO3H)] (6), [KZn(HO3P(CH2)4PO3H)(Cl)] (7), and [NH4Zn(O3P(CH2)4PO3H)] (8), have been successfully synthesizedunder mixed solvothermal conditions and characterized by X-ray single-crystal diffraction together with elemental analysis, infraredspectroscopy, thermogravimetric analysis, and powder X-ray diffraction. In 1 and 2, 1,2-ethylenediphosphonate groups combinecations (Na+, K+) and Zn-O-P layers into 3D frameworks, while in 3 and 4, ethylene and propylene groups are enclosed in novel3D Zn-O-P frameworks, respectively, which possess 8-membered ring (8MR) and 12MR channels. In 5-8, Zn-O-P infinitechains are pillared by 1,3-propylene- and 1,4-butylenediphosphonate groups into hybrid layers. It is interesting that in 7 K-Cllamellae link the Zn-O-P hybrid layer to form a 3D sandwichlike framework. If 1 is synthesized with commercial fluorescentwhitener (disodium 4,4'-bis(2-sulfonatostyryl)biphenyl) in the initial reaction mixture, it exhibits bright purple-blue luminescencewith a short lifetime. Photoluminescent properties of 4 and 8 are also discussed.