Synthesis of open-framework iron phosphates, [C6N2H14][(Fe2F2)-F-III(HPO4)(2)(H2PO4)(2)]center dot 2H(2)O and [C6N2H14](2)[Fe-3(III)(OH)F-3(PO4)(HPO4)(2)](2)center dot H2O, with one- and three-dimensional structures

摘要

The hydrothermal syntheses and structures of two new open-framework iron phosphates, I, [C6N2H14] [(Fe2F2)-F-III(HPO4)(2), (H2PO4)].2H(2)O, II, and [C6N2H14](2)[Fe-3(III)(OH)F-3(PO4) (HPO4)(2)](2). 3 H2O, are presented. The structures of both I and II consist of (FeOF2)-F-4 octahedra and PO4 terahedra linked to form one- and three-dimensional structures. Both the compounds possess infinite one-dimensional chains of Fe-O/F-Fe formed by the FeO4F2 octahedra. The di-protonated DABCO cations are located in between the chains in I and within the channels in II. Whilst I possess the tancoite structure with a new chain composition, II has a three-dimensional structure similar to the gallophosphate, ULM-1. Crystal data for I: M = 685.84, monoclinic, space group C2/c (no. 15), a = 7.232(2), b = 20.520(7), c = 13.933(4) Angstrom, beta = 97.68(3)degrees, v = 2049.1(1) Angstrom(3), Z = 4, rho(calc.) = 2.223 g cm(-3), mu(MoKalpha) = 1.841 mm(-1), R-1 = 0.06, wR(2) = 0.12, S = 1.17 for 163 parameters; II, M = 1303.33, monoclinic, space group = C2/c (no. 15), a = 18.1836(2), b = 10.0126(7), c = 20.0589(4) Angstrom, beta = 106.08(3)degrees, v = 3509.0(2) Angstrom(3), Z = 4, rho(calc) = 2.467 gcm(-3), mu(MoKalpha) = 2.830 mm(-1), R-1 = 0.034, wR(2) = 0.081, S = 1.06 for 284 parameters. (C) 2002 Elsevier Science (USA). [References: 49]