Solvent-Induced Synthesis of Zinc(II) and Manganese(II) Coordination Polymers with a Semirigid Tetracarboxylic Acid

• Published in: Crystal growth & design 2011-06, Vol.11 (6), p.2444-2452
• Main Authors: Qu, Ling-Ling, Zhu, You-Long, Li, Yi-Zhi, Du, Hong-Bin, You, Xiao-Zeng
• Format: Article
• Language: English
• ISSN: 1528-7483; 1528-7505
• DOI: 10.1021/cg200229h

By using a semirigid quadricarboxylate ligand 5,5′-(biphenyl-4,4′-diylbis(methylene))bis(oxy)diisophthalic acid (H4L), four novel coordination polymers were obtained solvothermally and characterized by single-crystal X-ray diffraction, thermogravimetric, photoluminescent and gas adsorption studies. Compound [Zn2(L)]·CH3CN, 1, is a three-dimensional (3D) framework built from one-dimensional (1D) rod-shaped Zn–O–C secondary building units (SBUs) that are linked together by the 4-connecting L ligands to give rod packing of pcu type and elliptical channels of 7.7 × 8.4 Å2. Compound [Zn4(L)2(H2O)4]·5H2O, 2, possesses a 3D open framework with a doubly interpenetrated sra net built from 4-connecting Zn2(OOC)4 unit and L ligand. Compound [Mn2(L)(H2O)2]·2H2O, 3, is built from trigonal–bipyramidal binuclear Mn2(OOC)3 units and octadentate L ligands, forming a binodal 5,5-connected 43.66.8 net. Compound [Mn(H2L)(DMA)(H2O)]·(DMA)(H2O), 4, is a two-dimensional (2D) layered structure made of 4-connecting mononuclear Mn atoms and half-deprotonated L ligands. N2 gas adsorption measurements at 77 K showed that compounds 1, 2, and 4 possess permanent porosities.