| Abstract |
Two new three-dimensional (3D) coordination compounds, namely a lead(II) coordination polymer (CP) \[Pb-3(mu(5)-cpta)(mu(6)-cpta)(phen)(2)]center dot 2H(2)O\(n) (1) and a zinc(II) metal-organic framework (MOF) \[Zn-2(mu(4)-cpta)(mu-OH)(mu-4,4 -bipy)]center dot 6H(2)O\(n) (2), were hydrothermally assembled from 2-(5-carboxypyridin-2-yl)terephthalic acid (H(3)cpta) as an unexplored principal building block and aromatic N,N-donors as crystallization mediators. Both products were isolated as air-stable microcrystalline solids and were fully characterized by IR spectroscopy, elemental and thermogravimetric analysis, and powder and single-crystal X-ray diffraction. Structural and topological features of CP 1 and MOF 2 were analyzed in detail, allowing to identify a topologically unique 4,5,5,6-connected net in 1 or a very rare 4,4-connected net with the isx topology in 2. Thermal stability and solid-state luminescent behavior of 1 and 2 were also investigated. Apart from revealing a notable topological novelty, both compounds also represent the first structurally characterized Pb(II) and Zn(II) derivatives assembled from H(3)cpta, thus opening up the application of this unexplored pyridine-tricarboxylate block in the design of new metal-organic architectures. |
