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A New Approach to Novel Cluster Compounds of Lead(II) Phosphonates
Author(s) -
Du ZiYi,
Xu HaiBing,
Li XiuLing,
Mao JiangGao
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700463
Subject(s) - chemistry , phosphonate , sulfonate , ligand (biochemistry) , cluster (spacecraft) , crystallography , stereochemistry , medicinal chemistry , organic chemistry , sodium , receptor , computer science , programming language , biochemistry
Five new lead(II) sulfonate‐phosphonates, namely [Pb 3 (L) 2 (H 2 O) 2 ] · 4H 2 O ( 1 ), [Pb(HL)(phen)] · H 2 O ( 2 ), [Pb 6 (L) 4 (phen) 8 ] · 3H 2 O ( 3 ), [Pb 6 (L) 4 (phen) 10 ] · 2H 2 O ( 4 ), and [Pb 6 (L) 4 (4,4′‐bipy)(H 2 O) 2 ] · 2H 2 O ( 5 ; H 3 L = m ‐HO 3 S‐C 6 H 4 ‐PO 3 H 2 , phen = 1,10‐phenanthroline, 4,4′‐bipy = 4,4′‐bipyridine) have been prepared and structurally characterized. Compound 1 features a novel 3D framework in which 1D chains of Pb 3 O 4 cluster units are further bridged by sulfonate‐phosphonate ligands, whereas compound 2 features a layer structure in which 1D chains of Pb 2 O 4 clusters are further bridged by sulfonate‐phosphonate ligands. Compounds 3 and 4 represent the first zero‐dimensional lead(II) phosphonates and feature novel isolated hexanuclear lead(II) clusters in which six Pb II ions are bridged by two tetradentate and two pentadentate phosphonate groups. Compound 5 features a 3D framework that is similar to that in compound 1 despite the different coordination modes for some sulfonate groups of the ligands. The main difference is that an aqua ligand in compound 1 is replaced by a nitrogen atom of the 4,4′‐bipy ligand, which results in the splitting of the large cavities in compound 1 into two small apertures in compound 5 . Compounds 1 and 5 exhibit strong broad blue fluorescent emission bands at 398 and 420 nm, respectively.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)