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合成和表征了3个杂冠醚配体(L1:单氮杂15C5,L_Ⅱ:单氮杂18C6,L_Ⅲ:1,7—二硫杂18C6)与稀土硝酸盐的配合物:〔Ln(NO_3)_3L_Ⅰ〕(Ln=La～Pr),[Ln-(NO_3)-3L_ Ⅱ〕(Ln=La～Pr),〔HL_Ⅱ〕~+〔Ln(NO_3)_4(OH_2)_2〕~-(Ln=Nd,Sm～Er,Yb),〔Ln(NO_3)_3.L_Ⅲ’(H_2O)](Ln=La～Nd,Sm～Er,Yb),其中L_Ⅲ’表示L_Ⅲ冠醚环上的2个硫原子在与稀土硝酸盐反应的过程中被氧化为亚砜.配合物〔HL_Ⅱ〕~+[Nd(NO_3)_4-(OH_2)_2]的晶体属单斜晶系,空间群P2_1/n,a=1.644 0(5),b=1.739 2(3),c=1.867 5(4)nm,β=107.26(2)°.Z=8,Nd~(+3)与4个二齿NO_3~-和2个水分子配位,形成长链状夹心式结构;配合物〔Er(NO_3)_3L_Ⅲ’(H_2O)〕·CH_3COCH_3的晶体为P2_1/n空间群,a=0.877 2(2),b=1.817 9(7),c=1.854 0(5)nm,β=103.50(3)°,Z=4,Er~(3+)与3个二齿NO_3~-、1个水分子及2个亚砜氧原子形成配位数为9的配合物.
(Ln (NO_3)) complexes with three rare earth nitrate ligands (L1: monoazepine 15C5, L_II: monoazepine 18C6 and L_III: 1,7-dithia 18C6) were synthesized and characterized. (Ln = La ~ Pr), [HLn] ~ + [Ln (NO_3) _4 (OH_2) _2] ~ - (Ln = La ~ Pr) , Ln (NO_3) _3.L_III ’(H_2O)] (Ln = La ~ Nd, Sm ~ Er, Yb), in which L_III’ represents that two sulfur atoms on the The crystal of complex [HL_Ⅱ] ~ + [Nd (NO_3) _4- (OH_2) _2] belongs to the monoclinic system with space group P2_1 / n, a = 1.644 (4) nm, β = 107.26 (2) °. Z = 8, Nd ~ (+3) and four bidentate NO_3 ~ - 2 The crystal of the complex [Er (NO_3) _3L_Ⅲ ’(H_2O)] · CH_3COCH_3 is a P2_1 / n space group with a = 0.877 2 (2) and b = 1.817 9 Β = 103.50 (3) °, Z = 4, Er ~ (3+) and three bidentate NO_3 ~ -, one water molecule and two sulfoxide oxygen The atom forms a complex with a coordination number of 9.