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由二乙醇胺与 H4 Si W1 2 O4 0 ·n H2 O合成了 [(HOCH2 CH2 ) 2 NH2 ]8· [Si W1 2 O4 0 ]2 · H2 O。单晶结构解析结果表明 ,晶体属三斜晶系 ,空间群 P 1 ,晶胞参数 :a=1 .3 5 3 2 (3 ) nm,b=1 .92 3 3 (4 ) nm,c=2 .0 472 (4 ) nm,α=89.2 8(3 )°,β=85 .49(3 )°,γ=82 .99(3 )°,Z=2 ,V=5 .2 75 4nm3,R=0 .0 60 2 ,Rw=0 .1 40 2。标题化合物分子由 2个杂多阴离子、8个质子化的二乙醇胺、1个结晶水组成。化合物具有可逆光色性。热分析结果表明 ,化合物阴离子在 5 48.5℃左右分解
[(HOCH2 CH2) 2 NH2] 8 · [Si W1 2 O4 0] 2 · H2O was synthesized from diethanolamine and H4SiW1 2 O4O · nH2O. The results of single crystal structure analysis show that the crystal belongs to the triclinic system with the space group P 1, with unit cell parameters of a = 1.53 2 (3) nm, b = 1.92 3 3 (4) nm, c = 2 .0 472 (4) nm, α = 89.2 8 (3) °, β = 85.49 (3) °, γ = 82.99 (3) °, Z = 2, V = R = 0 .0 60 2, Rw = 0. 1 40 2. The title compound molecule consists of 2 heteropolyanions, 8 protonated diethanolamines, 1 crystal water. The compounds have reversible photochromic properties. The results of thermal analysis show that the anions of the compounds decompose at around 5 48.5 ℃