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A Series of Three‐Dimensional Rare Earth Coordination Polymers with Two Binary Carboxylate as Mixed‐Ligand: Syntheses, Structures, Properties of [Ln III (mal)(ox) 0.5 (H 2 O) 2 ]·2H 2 O (Ln = Pr, Nd, and La)
Author(s) -
Zhang XingJing,
Xing YongHeng,
Han Jing,
Ge MaoFa,
Niu ShuYun
Publication year - 2008
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200800182
Subject(s) - lanthanide , maleic acid , oxalic acid , crystallography , orthorhombic crystal system , chemistry , carboxylate , crystal structure , thermal decomposition , ligand (biochemistry) , inorganic chemistry , stereochemistry , polymer , organic chemistry , ion , copolymer , biochemistry , receptor
A series of lanthanide coordination polymers, [Ln III (mal)(ox) 0.5 (H 2 O) 2 ]·2H 2 O (Ln = Pr ( 1 ), Nd ( 2 ), and La ( 3 ); H 2 mal= maleic acid; H 2 ox = oxalic acid), were synthesized firstly by the reaction of Ln III nitrate salts with maleic anhydrid and oxalic acid under hydrothermal conditions and were characterized by elemental analysis, IR spectroscopy, and single‐crystal X‐ray diffraction. X‐ray diffraction analyses reveal that they are crystallized in orthorhombic space group Fddd. Lanthanide metal center atom (Ln) and its corresponding centrosymmtric atom link through two chelating/bridging bidentate carboxyl groups of maleic acid ligands to form an infinite inorganic rod‐shaped building unit. These rod‐shaped building units were linked to each other through the carbon atoms of the maleate anions on the [110] plane to form lanthanide‐maleic acid layers. The oxalic acid pillared lanthanide‐maleic acid layers with intersected channels by free water molecules consist of a 3D framework structure. The thermogravimetric analyses of 1 – 3 were discussed in detail. The courses of the thermal decomposition of complexes are similar.