Hydrothermal synthesis of isostructural open-framework manganese and iron borophosphates: Effect of the organic templates in determining the pore shapes

• Published in: Solid state sciences Vol. 13; no. 4; pp. 757 - 761
• Main Authors: Yang, Weiting, Li, Jiyang, Xu, Jin, Xing, Hongzhu, Wang, Lei, Yu, Jihong, Xu, Ruren
• Format: Journal Article
• Language: English
• Published: Issy-les-Moulineaux Elsevier Masson SAS 01.04.2011; Elsevier Masson
• Subjects: Cations; Channels; Charge; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Diffraction; Exact sciences and technology; Ferromagnetism; Inorganic compounds; Iron; Magnetic; Magnetic measurement; Materials science; Materials synthesis; materials processing; Open-framework borophosphate; Organic template; Physics; Porosity; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Structure-directing; X-rays; Organic template; Magnetic; Open-framework borophosphate; Structure-directing; Antiferromagnetism; Borophosphate; Amines; Iron; XRD; Template method; Open framework; X-ray diffraction analysis; Magnetic properties; Piperazines; Thermogravimetry; Template reaction; Crystal symmetry; Magnetic measurement; Inductively coupled plasma; Hydrothermal synthesis; Weak ferromagnetism; Transition elements; Exchange interactions; Structural analysis; Manganese
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/j.solidstatesciences.2010.04.007

Three new isostructural organo-templated transition metal borophosphates, (C 3H 12N 2)[MnB 2P 3O 12(OH)] (denoted MnBPO-CJ30), (C 3H 12N 2)[FeB 2P 3O 12(OH)] (denoted FeBPO-CJ30A) and (C 4H 12N 2)[FeB 2P 3O 12(OH)] (denoted FeBPO-CJ30B) were hydrothermally synthesized by using 1,2-diaminopropane and piperazine as the template, respectively. Single-crystal X-ray diffraction analyses reveal that the framework of MBPO-CJ30 (M = Mn, Fe) is constructed from the connection of infinite loop-branched borophosphate [B 2P 3O 12(OH) 4−] chains and MO 6 octahedra, giving rise to three-dimensional (3-D) intersecting 8-, 8- and 9-ring channels along the [011], [01 1 ¯ ] and [100] directions, respectively. The negative charge of the framework is compensated by the diprotonated 1,2-diaminopropane or piperazine cations located in the 9-ring channels. These compounds are further characterized by powder X-ray diffraction, ICP, CHN, TGA, IR, and magnetic measurement. Structural analyses reveal that the organic amines that have the similar structure-directing ability but differing in size and shape have an influence on the crystal symmetry as well as the pore shapes of the 9-ring channels of these isostructures. Magnetic studies reveal that MnBPO-CJ30 exhibit antiferromagnetic behavior with weak ferromagnetic component to the magnetic interactions. [Display omitted]