947503-69-7Relevant academic research and scientific papers
Organic-acid effect on the structures of a series of lead(II) complexes
Yang, Jin,Ma, Jian-Fang,Liu, Ying-Ying,Ma, Ji-Cheng,Batten, Stuart R.
, p. 6542 - 6555 (2007)
An investigation into the dependence of coordination polymer architectures on organic-acid ligands is reported on the basis of the reaction of Pb(NO 3)2 and eight structurally related organic-acid ligands in the presence or absence of N-donor chelating ligands. Eight novel lead(II)-organic architectures, [Pb(adip)(dpdp)]2 1, [Pb(glu)(dpdp)] 2, [Pb-(suc)(dpdp)] 3, [Pb(fum)(dpdp)]·H2O 4, [Pb 2(oba)(dpdp)2]·2(dpdp)-2(NO3) ·2H2O 5, [Pb2(1,4-bdc)2(dpdp) 2]·H2O 6, [Pb(dpdc)(dpdp)] 7, and [Pb(1,3-bdc)(dpdp)]·H2O 8, where dpdp = dipyrido[3,2-a: 2′,3′-c]-phenazine, H2adip = adipic acid, H 2glu = glutaric acid, H2suc = succinic acid, H 2fum = fumaric acid, H2oba = 4,4′-oxybis(benzoic acid), 1,4-H2bdc = benzene-1,4-dicarboxylic acid, H2dpdc = 2,2′-diphenyldicarboxylic acid, and 1,3-H2bdc = benzene-1,3-dicarboxylic acid, were successfully synthesized under hydrothermal conditions through varying the organic-acid linkers and structurally characterized by X-ray crystallography. Compounds 1-8 crystallize in the presence of organic-acid linkers as well as secondary N-donor chelating ligands. Diverse structures were observed for these complexes. 1 and 5 have dinuclear structures, which are further stacked via strong π-π interactions to form 2D layers. 2-3 and 6-8 feature chain structures, which are connected by strong π-π interactions to result in 2D and 3D supramolecular architectures. Compound 4 contains 2D layers, which are further extended to a 3D structure by π-π interactions. A systematic structural comparison of these 8 complexes indicates that the organic-acid structures have essential roles in the framework formation of the Pb(II) complexes.
