Synthesis, Crystal Structures and Fluorescence Properties of Two One-Dimensional Cadmium(II) Coordination Polymers Containing Flexible Bis(benzimidazole) Ligands

Cobalt(II) and Copper(II) Complexes Constructed from Bis(benzimidazole) and 2,6‐Pyridinedicarboxylate Co‐ligands: Synthesis, Crystal Structures, and Catalytic Properties

“…The fluorescence properties of L1 and L2 ligands and 1 – 3 were investigated in the solid state at room temperature. The free L1 and L2 ligands exhibit emission peaks at 346 nm and 362 nm with excitations at 298 nm, respectively, which can be assigned to π→π* transition 17. The strong emission peaks of title complexes occur at 490 nm, 480 nm and 405 nm upon excitation at 240 nm, respectively (as shown in Figures S4 and S5, Supporting Information).…”

“…Additionally, the 5‐position substituent methyl benzimidazole ring plays a vital role in enhancing the electron donating ability of the N‐donor ligands, which may lead to bearing diverse architectures. However, transition metal complexes based on flexible bis(5,6‐dimethylbenzimidazole) and bis(5‐methylbenzimidazole) derivatives with –(Ph–CH 2 )– spacers have been less reported 14–17. Organic aromatic polycarboxylate ligands constitute the main family of multidentate O‐donor ligands, especially 2,6‐pyridinedicarboxylic acid (H 2 pydc) can coordinate metal ions through carboxylate bridge and tridentate chelation modes, along with function as hydrogen bond acceptors and hydrogen bond donors, which lead to generating intriguing structure and novel properties 18–20…”

CRYSTAL STRUCTURE AND FLUORESCENCE OF A 2D CADMIUM(II) COORDINATION POLYMER BASED ON FLEXIBLE bis(2-METHYLBENZIMIDAZOLE) AND BENZENEDICARBOXYLATE Co-LIGANDS

“…1, the Cd(II) center exhibits a distorted octahedral geometry coordinated by three oxygen atoms (O1, O3A, and O4A) from two different bdc 2í anions and one nitrogen atom (N3) from one bbmb ligand composing the equatorial plane (symmetry codes: A = -x, y+1/2, -z+1/2), one oxygen atom (O2) and one nitrogen atom (N1) from another bbmb ligand located in the axial sites with the angle of N1-Cd1-O2 of 150.220 2 Symmetry code: A = -x, y+1/2, -z+1/2. [ 20,21 ]. The flexible bbmb ligands adopt bis(monodentate) coordination mode and connect adjacent Cd(II) atoms adopting a twisted conformation to generate right-handed helical chains with the dihedral angles between the mean planes of the two benzimidazole rings of entire bbmb ligand of 84.668(2)°.…”

Copper Removal from Electroplating Wastewater by Coprecipitation of Copper-Based Supramolecular Materials: Preparation and Application Study

“…Supramolecular materials are based on supramolecular chemistry, which has had wide applications in a number of areas of materials science and technology [11][12][13][14]. In recent years, there has been great progress in the use of supramolecular materials in molecular devices and as liquid crystals, biomaterials, and nanomaterials [15][16][17][18].…”