{Zn₆} Cluster Based Metal–Organic Framework with Enhanced Room-Temperature Phosphorescence and Optoelectronic Performances

Abstract

Molecule-based solid-state materials with long lifetimes could enable longer migration distances for excitons, which are beneficial for vast applications in optoelectronic field. Herein, we report a hexanuclear zinc cluster based MOF exhibits highly enhanced phosphorescence about 2 orders of magnitude in comparison with the pristine phosphor ligand. The combination of both experimental and computational results suggest that the {Zn6} cluster is very important for adjusting molecular conformations, packing arrangement, and photophysical properties of the organic phosphor ligands within the MOF matrix. Optoelectronic measurements reveal that the MOF-modified electrode is catalytically active to hydrogen evolution under light irradiation in neutral solution. Thus, our study provide an effective way to achieve low-cost metal-based phosphorescence MOF, expanding its further optoelectronic applications.

Cobalt(II) and silver(I) coordination polymers containing flexible bis (benzimidazol‐1‐yl)hexane ligands: synthesis, crystal structures, sensing and photocatalytic properties

“…The centroid‐to‐centriod distance is 3.538(2) Å, an inter‐planar angle α = 11.1(2)° and slipping angles β and γ are 24.22° and 18.66°. (Figure c) …”

Three cobalt-based coordination polymers with tripodal carboxylate and imidazole-containing ligands: syntheses, structures, properties and DFT studies

“…Metal-organic coordination polymers of mixed-ligand assembly have become a very attractive research subject. [1][2][3][4] This is not only due to their intriguing structural diversity but also to the intriguing potential applications of functional materials, such as selective molecular recognition and separation, gas storage and separation, absorption, luminescence, molecular magnetism, ion-exchange and heterogeneous catalysis. [5][6][7][8] In this context, the predesign and assembly of novel crystalline materials by structure-directing factors, such as central metal ions, organic ligands, the metal-ligand ratio, solvents, temperature, pH value, and other factors, have been validated and summarized.…”

Coordination Assemblies of Zn(II) Coordination Polymers: Positional Isomeric Effect and Optical Properties

“…Moreover, the luminescent CP behaves as a luminescent sensor for the highly selective and sensitive detection of Fe 3+ , Fe 2+ , Cu 2+ and Ag + ions and o-nitrophenol (MNP), p-nitrophenol (PNP), 2,4-dinitrophenol (DNP), 2,4,6-trinitrophenol (TNP) and 4-nitrotoluene (4-NT) [7]. However, the successful assembly of CPs have faced great challenges in crystal engineering, because many factors have affected the resulting structures, such as rational choice of the bridging ligand and metal centers, temperature, solvent, pH value and the nature of anions [8][9][10][11][12]. Above all, the reasonable design of ligands is the most key factor.…”