Hydrothermal Synthesis and Crystal Structure of Na2[(VO)12O6B18O39(OH)3]·(11H3O)·4H2O

Abstract

Abstract: Ahydrothermal reaction of V₂O₅, Na₂B₄O₇·10H₂O, NaH₂PO₄·2H₂O, en, H₂Oin a molar ratio of 0.5:1:1:2.24:111 gives a brown crystal Na₂[(VO)₁₂O₆B₁₈O₃9(OH)₃] ·(11H₃O) · 4H₂O. It crystallizes in a monoclinic system with space group P₂ 1/n and unit cell parameters a=1.38970(8) nm, b=1.66159(9) nm, c=1.42748(8) nm, β=95.6910(10)°, Z=4, R=0.0549. The structure consists of a [(VO)₁₂O₆B₁₈O₃9(OH)₃]^13- cluster which is connected by Na⁺ through Na——Oionic bond to form a 2dimensional layered structure. The [(VO)₁₂O₆B₁₈O₃9(OH)₃]^13- cluster consists of a puckered B₁₈O₃9(OH)₃ ring sandwiched between two triangles of six edgesharing vanadium atoms. The oxidation states of vanadium in the compound are V(^Ⅳ) and V(Ⅴ) in a molar ratio of 5:1. Other characterizations are also described.

Key words: Hydrothermal synthesis, Crystal structure, Polyoxovanadium, Borate compound

CLC Number:

O614

TrendMD:

ZHANG LiRong, LI GuangHua, SHI Zhan, FENG ShouHua. Hydrothermal Synthesis and Crystal Structure of Na₂[(VO)₁₂O₆B₁₈O₃₉(OH)₃]·(11H₃O)·4H₂O[J]. Chem. J. Chinese Universities, 2001, 22(12): 1963.

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Hydrothermal Synthesis and Crystal Structure of Na₂[(VO)₁₂O₆B₁₈O₃₉(OH)₃]·(11H₃O)·4H₂O

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