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报道了具有菱形隧道的配位聚合物:[Nd2（C8H5NO4）3·4H2O]∞的单晶结构.它有两个晶体学独立的金属Nd（Ⅲ）离子中心,每个金属Nd（Ⅲ）离子处于8配位的环境中.8个配位的氧原子中7个氧原子来源于6个5-氨基间苯二甲酸有机配体,另一个氧原子由配位水提供.羧基通过η1,1和η1,3方式连接两个Nd3+.晶体数据:三斜晶系,空间群P1,a=1.03680（5）nm,b=1.66934（15）nm,c=0.88221（14）nm,α=99.754（2）℃,β=111.169（4）°,γ=85.400（4）°.一部分配体在平行于ab面连接金属Nd（Ⅲ）形成分子梯,另一部分配体沿着c轴分子梯构成菱形隧道,同时配位水分子和氨基悬挂在隧道中.
A single crystal structure of a [Nd2 (C8H5NO4) 3 · 4H2O] ∞ coordination polymer with diamond tunneling has been reported, which has two crystallographic centers of Nd (Ⅲ) In the 8 coordination environment .One of the eight coordination oxygen atoms is derived from six 5-aminoisophthalic acid organic ligands and the other oxygen atom is provided by coordination water. And η1,3, respectively. Two crystal structures were obtained: triclinic system with space group P1, a = 1.03680 (5) nm, b = 1.66934 (15) nm, c = 0.88221 (14) nm and α = 99.754 2) ° C, β = 111.169 (4) °, γ = 85.400 (4) °. A part of the ligands are connected to the metal Nd (Ⅲ) parallel to the ab plane to form a molecular ladder and the other ligands form a rhombus along the c- Tunnel, while coordinating water molecules and amino hanging in the tunnel.