名称:
Synthesis and structures of CoII, NiII, and CuII coordination frameworks formed by a flexible 1,3-phenylenediacetic acid ligand
摘要:
Three new compounds of Co-II, Ni-II and Cu-II with a flexible dicarboxylate building block 1,3-phenylenediacetate, along with 4,4'-bipyridine, or 4,4'-trimethylenedipyridine co-ligands, with the formula {[Co-2(4,4'-bipy)(2)(1,3-pda)(2)]center dot 1.5H(2)O}(n) (1), {Ni(4,4'-bipy)(1,3-pdaH)(2)(CH3CH2OH)(2)}(n) (2), and {Cu(tmdp)(1,3-pda)}(n) (3), (where, 1,3-pda = 1,3-phenylenediacetate, 4,4'-bipy = 4,4'-bipyridine, and tmdp = 4,4'-trimethylenedipyridine) have been synthesized and structurally characterized. Compound 1 was synthesized hydrothermally at 180 degrees C, whereas 2 and 3 were synthesized at room temperature in H2O/ethanol medium. The 2D coordination network of 1 is formed by pillaring the 1D staircase Co-2(1,3-pda)(2) chain by 4,4'-bipy, whereas the 3D supramolecular framework 2 is constituted by connecting the 2D H-bonded Ni(1,3-pdaH)(2)(C2H5OH)(2) sheets. Compound 3 shows an unusual 2D network which is built by the flexible 1,3-pda and tmdp linkers by connecting Cu-2(1,3-pda)(2) dimeric building unit. (C) 2010 Elsevier B.V. All rights reserved.