Wutkowski, A., Srinivasan, B. R., Naik, A. R., Schutt, C., Nather, C. and Bensch, W. (2011) Synthesis, Structure, and Photochemistry of an Organic Heptamolybdate-Monomolybdate. European Journal of Inorganic Chemistry (14). pp. 2254-2263. DOI 10.1002/ejic.201001154.

Abstract

Treatment of MoO(3) with butan-1-amine (BuNH(2)) or pyrrolidine (PyrNH(2)) results in the formation of (BuNH(3))(8)(Mo(7)O(24))-(MoO(4))center dot 3H(2)O (1; BuNH(3) = butan-1-aminium) or (PyrNH(2))(6)-(Mo(7)O(24)center dot 2H(2)O (2; PyrNH(2) = pyrrolidinium), respectively. On irradiation with sunlight, compound 1, which is an organic heptamolybdate Mo(7)O(24)(6-) that contains a cocrystallized monomolybdate MoO(4)(2-) in the same compound, is transformed to an oxido-bridged diheptamolybdate(BuNH(3))(10)(-)(Mo(7)O(22))(mu(2)-O)(2)(Mo(7)O(22))ce nter dot 5.5H(2)O (1b). The Mo(7)O(24)(6-) units in 1 and 2 are made up of edge-sharing MoO(6) octahedra, whereas the central unit in 1b is a bis(mu(2)-O)-bridged heptamolybdate dimer. Hydrogen bonding among the lattice water molecules in 1 results in the formation of a water octamer, whereas hydrogen bonding between the lattice water molecules and Mo(7)O(24)(6-) in 2 results in the formation of a one-dimensional water-linked heptamolybdate chain. Supramolecular structures, photochemistry, and thermal properties of 1, 1b, and 2 are reported. For comparison of photochemical behavior, two more polyoxomolybdates, (PrNH(3))(6)Mo(7)O(24)center dot 3H(2)O (3; PrNH(3) = propan-1-aminium) and (PentNH(3))(6)(-)Mo(7)O(24)center dot 3H(2)O (4; PentNH(3) = pentan-1-aminium), were prepared and characterized.

Actions (login required)

View Item