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首页> 外文期刊>Crystal growth & design >Lanthanide-organic framework of a rigid bis-Gd complex: Composed by carbonate ions spacers
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Lanthanide-organic framework of a rigid bis-Gd complex: Composed by carbonate ions spacers

机译：刚性bis-Gd配合物的镧系元素-有机骨架：由碳酸根离子间隔基组成

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摘要

A new lanthanide-organic framework (LOF) based on a long (21.2 ?) and rigid bis-Gd complex synthon (complex 1) and carbonate anion spacers was discovered. Complex 1 is comprised of two Gd~(3+) ions complexed with a pyridine tetracarboxylate ligand and a bridging linear 1,4-diethynylbenzene unit. Two water molecules are coordinated to each Gd ion in order to satisfy its high coordination number. Upon crystallization of 1 in ethanolic aqueous sodium bicarbonate, the carbonate anions replace the coordinated water molecules, partially or fully, resulting in the construction of two network types (type A and B). All three oxygen atoms of the carbonate anion are utilized in its function as a spacer between two synthons (complex 1) in the networks, but the chelating oxygen atoms (to Gd~(3+) ions) and their coordination modes differ in each of the two networks. In addition, the carbonate anions also serve as acceptors for hydrogen bonding (O-H?O) with water molecules coordinated to Gd~(3+) ions in both the networks. While all the synthons adopt a planar conformation in network A, they are backed alternatingly in plane and vertical conformation in network B. Overall, in this new LOF the synthons are packed in cris-cross fashion and tethered by carbonate ion spacers, creating a crystal lattice perforated by 10.6 × 15.6 ? and 18.6 × 15.6 ? wide-open channels.
机译：发现了一种新的镧系元素-有机骨架（LOF），该骨架基于长的刚性双-Gd复合合成子（复合物1）和碳酸根阴离子间隔基（21.2？）。配合物1由与吡啶四羧酸酯配体和桥接线性1，4-二乙炔基苯单元配合的两个Gd〜（3+）离子组成。两个水分子与每个Gd离子配位，以满足其高配位数。在乙醇碳酸氢钠水溶液中结晶1后，碳酸盐阴离子部分或完全取代了配位的水分子，从而构建了两种网络类型（A型和B型）。碳酸根阴离子的所有三个氧原子都被用作网络中两个合成子（复合物1）之间的间隔基，但是螯合氧原子（与Gd〜（3+）离子）及其配位模式在每个两个网络。此外，碳酸根阴离子还充当与两个网络中与Gd〜（3+）离子配位的水分子氢键（O-H2O）的受体。尽管所有合成子在网络A中均采用平面构象，但它们在网络B中在平面和垂直构象中交替排列。总体而言，在此新的LOF中，合成子以cris-cross方式包装，并被碳酸根离子间隔子束缚在一起，形成了晶体晶格穿孔10.6×15.6？和18.6×15.6？开放渠道。

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