A New Open-framework Iron Borophosphate from Ionic Liquids: KFe[BP2O8(OH)]

作者：Wang Guangmei; Mudring Anja Verena^*

来源：Crystals, 2011, 1(2): 22-27.

DOI：10.3390/cryst1020022

• iron borophosphate
• ionothermal synthesis
• crystal structure

A new open-framework iron borophosphate, KFe[BP2O8(OH)], has been obtained by ionothermal synthesis from KH2PO4, FeCl3 center dot 4H(2)O, H3BO3 and [C(4)mpyr]Br (1-butyl-1-methylpyrrolidinium bromide). Single-crystal X-ray diffraction analysis shows that KFe[BP2O8(OH)] (monoclinic, P2(1)/c, a = 9.372(2) angstrom, b = 8.146(2) angstrom, c = 9.587(2) angstrom, beta = 101.18(3)degrees, V = 718.0(2)angstrom(3) and Z = 4) has a three-dimensional (3-D) framework structure composed by {Fe(III)O-5(OH)} octahedra as well as {BO3(OH)} and {PO4} tetrahedra. As anionic structural sub-unit, KFe[BP2O8(OH)], contains an infinite open-branched {[BP2O8(OH)](4-)} chain which is formed by alternating {BO3(OH)} and {PO4} tetrahedra. {Fe(III)O-5(OH)} octahedra share common O corners with five phosphate tetrahedra and the OH corner links to the hydrogen borate group to give a 3D framework. The negative charges of the inorganic framework are balanced by K+ ions.

• 出版日期2011-6