Classification of Structural Motifs in Porphyrinic Coordination Polymers Assembled from Porphyrin Building Units, 5,10,15,20-Tetrapyridylporphyrin and Its Derivatives

In this review, we classify 1D, 2D, and 3D structural motifs found in porphyrinic coordination polymers assembled from 5,10,15,20-tetrapyridylporphyrin (TPyP) and its derivatives. The classifications are based on dimensionality, metal-to-porphyrin linkage, porphyrin type, and metal-to-porphyrin ratio. 1D porphyrin polymers often share the same connectivity (or structural motifs) with analogous 2D and 3D polymers. We identify interrelationships among 1D, 2D, and 3D coordination polymers and examine the connectivity of such interrelated structures. We also discuss the broad similarities and differences of the synthetic methods of all structures presented here

Structural Elucidation of a Calcined Layered Lanthanide-Organic Framework Comprising an Unprecedented Organic Polymer

The crystal structure of the two-dimensional layered material [La(L)] (where L (3-) stands for [-(PO3CH2)(2)(NH)(CH2PO2)(mu-O)(A1/2)-](3-)) was determined from single-crystal X-ray diffraction studies at the low temperature of 180(2) K. The material comprises a one-dimensional organic linker obtained from the condensation of individual residues of H(3)nmp(3-) present in the parent polymeric two-dimensional material [La(H(3)nmp)], at the high temperature of 340 A degrees C {where H(6)nmp stands for [N(CH2PO3H2)(3)]}. Previous structural investigations on this system were only achieved using poor-quality powder X-ray diffraction data leading to two possible models for the crystal structure of [La(L)]. This work unequivocally unveils the structural features of this material, describing in detail the connectivity within the layers and the formation of the unprecedented polymeric zigzag one-dimensional linker. The crystal structure of the two-dimensional layered material [La(L)] (where L (3-) stands for [-(PO3CH2)(2)(NH)(CH2PO2)O-A1/2-](3-)) was determined from single-crystal X-ray diffraction studies at the low temperature of 180(2) K and compared with the two possible models previously obtained using poor-quality powder X-ray diffraction data. Schematic representation of the crystal packing of the [La(L)] framework viewed in perspective along the [100] direction of the unit cell