Novel Layered Organic–Inorganic Networks Assembled From PbI2 and N,N′-bis(3-pyridylmethyl)-1,4-biphenylenedimethyleneimine

Abstract

Two novel metal-organic frameworks with different structures were obtained by reactions of PbI2 with N,N′-bis(3-pyridylmethyl)-1,4-biphenylenedimethyleneimine (L) under different M/L ratios. When the M/L ratio is 1:1, L bridges [PbI2]n chains to form a layered organic–inorganic hybrid compound with the empirical formula [Pb(L)I2] (1). When changing the M/L ratio to 2:1, L bridges the double chains [Pb2I4]n to form networks [Pb2(L)I4] (2), which are further linked by C–H···I hydrogen bonds to give a 3D structure.

Construction of ZnII Compounds with a Chelating 2,2′‐Dipyridylamine (Hdpa) Ligand: Anion Effect and Catalytic Activities

“…The importance of such C–H ··· I hydrogen bonds in the supramolecular self‐assembly was also reported recently 7c,8. Self‐assembly of discrete metal complexes by weak C–H ··· I–Zn interactions was reported,9 although intermolecular C–H ··· I interactions do exist in a few compounds 7c,8. This is only the second example of self‐assembly of Zn–I ··· H–C nonclassical H‐bonding interactions 9.…”

“…The H ··· I distance of 3.162(2) Å and the N–H ··· I angle of 137.73(1)° indicate the formation of N–H ··· I hydrogen bonds, and the H ··· I distance of 3.249(3) Å and the C–H ··· I angle of 145.86(1)° indicate the formation of C–H ··· I hydrogen bonds 7. The importance of such C–H ··· I hydrogen bonds in the supramolecular self‐assembly was also reported recently 7c,8. Self‐assembly of discrete metal complexes by weak C–H ··· I–Zn interactions was reported,9 although intermolecular C–H ··· I interactions do exist in a few compounds 7c,8.…”

Halide-bridged polymers of divalent metals with donor ligands – structures and properties

“…The latter is obtained by annealing of the former at moderate temperatures. Double chains based on PbI 2 have been crosslinked with ditopic donor ligands to form layered architectures with the sequence Pb 2 I 4 (L-L) 2 Pb 2 I 4 (L-L); the structures for L-L = N,N -bis(3-pyridylmethyl)-1,4-biphenylenedimethyleneimine [185] and 4,4 -dipyridyl-N,N -dioxide (dpdo) (cf. Fig.…”

Synthesis, Crystal Structures, and Photoluminescence of a Series of Coordination Polymers with Two Homologous Functional Flexible Ligands

“…Taking the van der Waals radii of H and I to be 1.20 and 2.15 Å, respectively, any H···I contact of less than 3.35 Å and C-H···I angle greater than 130°can therefore be considered as being significant. [13][14][15] Because left-and righthanded helical chains coexist in the crystal structure, the whole crystal is mesomeric and does not exhibit chirality.…”