Alkyl linker effects on the coordination topology of ditopic di(2-pyridylmethyl)amine carboxylate ligands with Zn<sup>II</sup>and Cu<sup>II</sup>: polymers<i>vs.</i>macrocycles
作者:Kiattipoom Rodpun、Allan G. Blackman、Michael G. Gardiner、Eng Wui Tan、Carla J. Meledandri、Nigel T. Lucas
DOI:10.1039/c5ce00375j
日期:——
[Zn(C3COO)(H2O)](ClO4)·3.5H2O}n (1), [Zn(C4COO)(H2O)]4(ClO4)4·1.5H2O}n (2), [Zn(C5COO)(H2O)](ClO4)}n (3), [Cu(C3COO)](ClO4)·MeOH}n (4), [Cu(C4COO)(H2O)]2(ClO4)2·2H2O}n (5) and [Cu(C5COO)(H2O)](ClO4)·2H2O}n (6). In contrast, the ligands with longer alkyl chains (n ≥ 7) participate in Zn2L2 metallomacrocyclic structures [Zn(C7COO)(H2O)](ClO4)}2 (7), [Zn2(C10COO)2(H2O)2](ClO4)2·2H2O·MeOH (8) and [Z
合成了一系列结合了一系列正烷基连接基的二位ω-二(2-吡啶基甲基)胺羧酸配体(C n COOH,n = 3-5、7、10和11)。固溶相研究表明,在所有情况下,配体与M(ClO 4)2 ·6H 2 O(M = Zn II或Cu II)之间为1:1配位化学计量。锌II和铜II配合物随后通过液-液扩散而结晶,并通过X射线晶体学研究了固态结构。所获得的晶体结构与溶液相加合物的金属配体比为1:1完全一致。然而,配位几何形状和复杂的拓扑结构取决于配体C n COOH的烷基链长。锌II和Cu II的短链烷基配位体的复合物(Ñ ≤5)表现出1D协调与[锌(有点不同的构象聚合结构Ç 3 COO)(H 2 O)](CLO 4)·3.5H 2 O} n(1),[Zn(C 4 COO)(H 2 O)] 4(ClO 4)4 ·1.5H 2 O} n(2),[Zn(C 5 COO)(H 2 O)]( ClO 4)}