Three-dimensional bimetallic oxides constructed from molybdophosphonate chains and secondary-metal/4-pyridyltetrazole components
摘要:
The hydrothermal reactions of molybdenum(VI) oxide, 1,2-ethylene diphosphonic acid, 4-pyridyltetrazole (4-Hpt) and the appropriate metal acetate yielded a series of three-dimensional bimetallic oxides of the general formula [M-x(4-Hpt)(y)(H2O)(z){Mo5O15(O3PCH2CH2PO3)}]center dot nhydrate (M = Co or Ni, x = 2, y = 2, z = 6; M = Cu, x = 4, y = 3, z = 1). The Co(II) and Ni(II) phases are isomorphous with structures constructed from the common {Mo5O15(O3PCH2CH2PO3)}(n)(4n) chains linked through binuclear {M-2(4-Hpt)(2)(H2O)(6)}(4+) subunits to provide the three-dimensional connectivity. The copper(I) species consists of the molybdophosphonate chains embedded in a framework of Cu(I) tetrahedra linked through the tetrazole nitrogen donors of the 4-Hpt ligands. (C) 2012 Elsevier B. V. All rights reserved.
Three-dimensional bimetallic oxides constructed from molybdophosphonate chains and secondary-metal/4-pyridyltetrazole components
作者:Stephanie Jones、Kari Darling、Jon Zubieta
DOI:10.1016/j.ica.2012.10.022
日期:2013.1
The hydrothermal reactions of molybdenum(VI) oxide, 1,2-ethylene diphosphonic acid, 4-pyridyltetrazole (4-Hpt) and the appropriate metal acetate yielded a series of three-dimensional bimetallic oxides of the general formula [M-x(4-Hpt)(y)(H2O)(z)Mo5O15(O3PCH2CH2PO3)}]center dot nhydrate (M = Co or Ni, x = 2, y = 2, z = 6; M = Cu, x = 4, y = 3, z = 1). The Co(II) and Ni(II) phases are isomorphous with structures constructed from the common Mo5O15(O3PCH2CH2PO3)}(n)(4n) chains linked through binuclear M-2(4-Hpt)(2)(H2O)(6)}(4+) subunits to provide the three-dimensional connectivity. The copper(I) species consists of the molybdophosphonate chains embedded in a framework of Cu(I) tetrahedra linked through the tetrazole nitrogen donors of the 4-Hpt ligands. (C) 2012 Elsevier B. V. All rights reserved.
SiO<sub>2</sub>–H<sub>3</sub>BO<sub>3</sub>promoted solvent-free, green and sustainable synthesis of bioactive 1-substituted-1H-tetrazole analogues
作者:Mehtab Parveen、Faheem Ahmad、Ali Mohammed Malla、Shaista Azaz
DOI:10.1039/c4nj02079k
日期:——
1-substituted-1H-tetrazole analogues 4(a–o) were synthesized, which were typically accessed via a facile, solvent-free and green synthetic protocol. The reaction involves expeditious reusable catalyst (SiO2–H3BO3) promoted condensation between a variety of heterocyclic/aromatic amines, sodium azide and triethyl ortho-formate, eliminating the use of an environmentally toxic solvent. This new eco-friendly and sustainable