Related Experiment Video
Updated: Jun 18, 2026
Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
Published on: July 3, 2015
The first organic-templated vanadyl(IV) gallophosphates with ambient (51)V hyperfine structure, {V(2)Ga(2)O(14)}
Li-Hsun Huang1, Yi-Chun Lai, Hui-Chun Lai
1Department of Chemistry, National Tsing HuaUniversity, Hsinchu 30013, Taiwan.
Abstract:
Three new vanadyl gallium phosphates, (H(2)dap)(3)[(VO)(2)(GaO)(2)(PO(4))(4)].H(2)O (1), (H(2)dap)(1.5)[(VO)(2)(GaO)(2)(PO(4))(3)].3H(2)O (2), and (H(2)dap)[(VO)(2)Ga(4)(PO(4))(6)(H(2)O)(4)].2H(2)O (3) (dap = 1,3-diaminopropane), have been prepared under mild solvothermal conditions and characterized by single-crystal X-ray diffraction, thermogravimetric analysis, magnetic susceptibility, and EPR spectroscopy. They are the first examples of an organic/V(4+)/Ga/P/O system that displays three different dimensional structures with a common template. The 1D chain structure of 1 and the 2D layered 2 are both built up with a PO(4) and {V(2)Ga(2)O(14)} cluster which contains a syn-square pyramidal {V(2)O(8)} dimer and two GaO(4) tetrahedra. The tetrameric cluster and V-O-Ga therein are observed in a metal phosphate system. Compound 3 is composed of VO(5)(H(2)O) octahedra, GaO(4)(H(2)O) trigonal bipyramids, and GaO(4) and PO(4) tetrahedra from which a unique 3D structure containing one-dimensional 12-ring channels is constructed. The channel aperture uncommonly comprises heterometal (V, Ga) polyhedra. Magnetic susceptibility data for 1-3 are consistent with V(4+) and show a T(N) of 12 K for 3. The unusual syn-{V(2)O(8)} dimers in 1 and 2 induce superexchange interactions, while isolated VO(5)(H(2)O) octahedra in 3 display super-super-exchange interaction. Electron paramagnetic resonance spectra with (51)V hyperfine structures were distinctly observed at 300 K for 1, while they started emerging at 30 K for 2 and 7 K for 3. The average hyperfine constant, 85.56 Gauss, was obtained via spectral simulations and nonlinear least-squares fittings for 1 and 2. Crystal data for 1 are triclinic, P1, a = 9.1754(4) A, b = 10.7853(5) A, c = 15.6519(7) A, alpha = 93.251(1) degrees , beta = 92.530(1) degrees , gamma = 95.106(1) degrees , V = 1538.4(1) A(3), and Z = 2; for 2, monoclinic, P2(1)/n, a = 8.9195(3) A, b = 14.6374(5) A, c = 17.8608(6) A, beta = 97.272(1) degrees , V = 2313.1(1) A(3), and Z = 4; and for 3, monoclinic, P2(1)/c, a = 9.0970(5) A, b = 16.9940(9) A, c = 9.6441(5) A, beta = 103.456(3) degrees , V = 1450.0(1) A(3), and Z = 4.
More Related Videos
07:20Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods
Published on: October 6, 2023
07:14Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
Related Concept Videos
02:42Valence Bond Theory
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
01:23Properties of Organometallic Compounds
01:18Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group with both...
02:42Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
02:54Lewis Structures of Molecular Compounds and Polyatomic Ions