摘要
Single-crystal X-ray structural analysis of K5Na5H3[Nd(α-SiW11O39)2]·6H2O (triclinic, space group P1^-, a = 13.7738(10), b = 19.722(2), c = 20.6647(15) A, α = 111.0090(10), β = 105.1740(10), y = 98.6870(10)°, Z = 2, V = 4867.2(8), Mr = 5914.40, Dc = 4.026,μ = 26.754 mm^-1, F(000) = 5076, R = 0.0750 and wR = 0.2077) reveals that two [α-SiW11O39]^8- moieties are connected through one Nd atom which is in a square antiprismatic coordination environment by eight oxygen atoms from two [α-SiW11O391]^8- moieties. The Nd(Ⅲ) ion is substituted for a [WO]^4+ unit in the "cap" region of the tungsten-oxygen framework of the parent Keggin ion. Disordered Na^+ cations and water molecules reside outside these channels, leaving empty pores with an intersecting slot (13 A × 10 A).
Single-crystal X-ray structural analysis of K5Na5H3[Nd(α-SiW11O39)2]·6H2O (triclinic, space group P1^-, a = 13.7738(10), b = 19.722(2), c = 20.6647(15) A, α = 111.0090(10), β = 105.1740(10), y = 98.6870(10)°, Z = 2, V = 4867.2(8), Mr = 5914.40, Dc = 4.026,μ = 26.754 mm^-1, F(000) = 5076, R = 0.0750 and wR = 0.2077) reveals that two [α-SiW11O39]^8- moieties are connected through one Nd atom which is in a square antiprismatic coordination environment by eight oxygen atoms from two [α-SiW11O391]^8- moieties. The Nd(Ⅲ) ion is substituted for a [WO]^4+ unit in the "cap" region of the tungsten-oxygen framework of the parent Keggin ion. Disordered Na^+ cations and water molecules reside outside these channels, leaving empty pores with an intersecting slot (13 A × 10 A).
基金
The project was supported by the Natural Science Foundation of Henan University (No. XK04YBRW057)