| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1306091 | Inorganica Chimica Acta | 2012 | 6 Pages |
Three indium phosphates [In16(HPO4)28(H2O)12](NH4)8(H2O)12 (1), [In2(OH)(HPO4)2(PO4)](H2O)(C6H18N2) (2) and [In3(HPO4)6](C2N2H10)(H3O)(H2O)2 (3) were solvothermally synthesized from water/ethylene glycol (EG) mixed solvent systems by using 1,3-propyldiamine (1,3-PDA), 2-methyl-pentamethylenediamine (MPMD) and diethylenetriamine (DETA) as structure directing agents (SDAs), respectively. Compound 1 consists of anionic layers of [In7(HPO4)14(H2O)6]7−, which are connected by InO6 octahedra to form an anionic three-dimensional (3-D) open framework with intersecting 12-membered rings channels. The channels are filled with charge-balancing ammonium cations and guest water molecules. Compound 2 possesses a 2-D layered structure consisting of anionic layers of [In2(OH)(HPO4)2(PO4)]2– formed by InO6 octahedra and PO4 tetrahedra, in which the protonated MPMD and water molecules lie between the layers. Compound 3 is constructed from a [3.3.3] propellane-like building unit made of strict alternation of InO6 octahedra and PO4H tetradedra, forming a 3-D open framework with intersecting 8- and 12-membered ring channels. The protonated water and ethylenediamine derived from the decomposition of DETA during the synthesis are located within the channels. The three compounds were characterized by powder X-ray diffraction (PXRD), single crystal X-ray diffraction, Fourier-transformed infrared (FT-IR) spectra, thermogravimetric analysis (TGA), inductively coupled plasma-atomic emission spectroscope (ICP-AES) and elemental analyses.
Graphical abstractThree new indium phosphates were solvothermally prepared from the mixed water–ethylene glycol solvent systems by using different amines as structure directing agents under otherwise same conditions, which possess a 3-D pillared layer, a 2-D sheet and a 3-D framework of pcu topology, respectively.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Three indium phosphates solvothermally obtained from the water/ethylene glycol mixed solvent systems. ► Compound 1 is a 3-D open framework with intersecting 12-membered rings channels. ► Compound 2 possesses a 2-D layered anionic structure. ► Compound 3 is a 3-D open framework of pcu topology with intersecting 8- and 12-membered ring channels.
