Syntheses, Structures, and Luminescent Properties of Two Novel Coordination Polymers with Mixed Ligands

Abstract

Two novel metal-organic coordination polymers {[Pb 2 (MIP) 2 (BDC) 2 ]ÁH 2 O} n 1 and [Cd(MIP)(NDC)] n 2 [MIP = 2-(3-methoxyphenyl)-1H-imidazo [4,5-f] [1, 10]phenanthroline, BDC = terephthalic acid, NDC = naphthalene-1,4-dicarboxylic acid] were obtained from hydrothermal reaction and characterized by elemental analysis, thermogravimetric (TG) analysis, infrared spectrum (IR) and single-crystal X-ray diffraction. The coordination polymers crystallize in triclinic, space group P-1 with a = 1.0335(2), b = 1.4224(3), c = 1.8156(4) nm, b = 106.088(3)°for complex 1 and the complex 2 crystallizes in monoclinic, space group P2(1)/n with a = 1.2562(8), b = 1.4800(9), c = 1.3723(8) nm, b = 97.257(1)°, respectively. The metal ions Pb(II) are located in [:PbN2O4] pentagonal bipyramidal geometry in complex 1. The metal ions Cd(II) in complex 2 act as distorted octahedral geometry, being surrounded by four carboxylate oxygen atoms from three NDC ligands and two donor nitrogen atoms from one MIP molecule. Moreover, there are hydrogen bonds in the two complexes, and it is noteworthy that the existence of hydrogen bonds and p-p interactions reinforce the structural stability of the title complexes, which have been proved by TG analysis. The luminescent properties for the ligand MIP, NDC and complex 2 are also discussed in detail.

Structure modulation of manganese coordination polymers consisting of 1,4-naphthalene dicarboxylate and 1,10-phenanthroline

“…The solvo/hydrothermal method has been widely used to synthesize coordination polymers since it can alleviate the problems of ligand solubility and improve the reactant reactivity during the crystallization process. 25 The preparation of coordination polymers can be influenced by several factors, including the coordination nature of the metal ions, ligand structures, solvent, temperature, and so on. [26][27][28][29][30][31][32] Among those mentioned above, the selection of ligands is crucial in the construction of coordination polymers because changing the ligand will further control and regulate the topologies of coordination polymers.…”

Hydrothermal Syntheses, Crystal Structure, and Photophysical Property of a Novel 2D Coordination Polymer with Holo-Directed Geometry of Lead(II)

“…ctpt is a derivative of 1,10-phenanthroline, which is a long-conjugated unsymmetrical rigid reagent which can not only act as a terminal ligand but also potentially provide supramolecular interactions such as aromatic stacking to construct intriguing structures. At this stage, combine N-heterocyclic ligands and anionic O-donor as mixed ligands with metal to design various architectures is considered an attractive design strategy [7,8].…”

Hydrogen Bonded Supramolecular Framework in Inorganic-Organic Hybrid Compounds: Syntheses, Crystal Structures, and Photoluminescent Properties

“…[7,8] In reported MOFs, N-heterocyclic ligands, such as 2,2 -bipyridine, 4,4 -bipyridine, 1,10-phenanthroline, and their substituted derivatives played an important role in the rational design to obtain anticipant structures and desired properties. Our strategy of rational design and synthesis of coordination polymers is to employ a new designed longconjugated unsymmetrical ligand bip (2-(4-bromophenyl)-1H-imidazo [4,5-f] [1,10]phenanthroline) (as shown in Scheme 1): in view of the following characteristics, (a) it possesses extended long-conjugated unsymmetrical aromatic system to provide supramolecular interactions; (b) it has two chelating nitrogen atoms, which is similar with 2,2'-bipyridyl-like bidentate chelating ligands; and (c) it possesses strong and rigidity of coordination ability to metal atoms to construct intriguing structures. [9] For the past several years, we have worked on the synthesis of N-heterocyclic compounds.…”

“…[9] For the past several years, we have worked on the synthesis of N-heterocyclic compounds. [10][11][12] However, the investigation for this type of ligands is not enough. Based on the previous reasons, we design and synthesize of the polymers, namely: [Zn(bip)(BDC)] 1 and [Co(bip) 2 Cl 2 ·4H 2 O] 2.…”