A Series of Iodoargentates Directed by Solvated Metal Cations Featuring Uptake and Photocatalytic Degradation of Organic Dye Pollutants

Abstract

By using solvated metal cations as structure-directing agents, three new iodoargentates, namely,[ Fe(DMSO) 6 ] [Ag 6 I 9 ]·DMSO (1), [Fe(H 2 O) 6 ][Ag 15 I 18 ]( 2)a nd [Cd(DMSO) 6 ] [Ag 8 I 10 ]( 3)( DMSO = dimethyl sulfoxide) have been solvothermally prepared and structurallyc haracterized. The structures of compounds 1 and 2 can be described as 1D chains constructed from the linkageo f[ Ag 6 I 9 ]a nd [Ag 5 I 11 ]b uilding units, respectively.F or compound 3,t he [Ag 10 I 22 ]b uilding blocks are directly interconnected to form a2 D[ Ag 8 I 10 ]l ayer,which are furtheri nterconnected via intermolecularf orces to generate a3 Ds upramolecular framework with 1D large channels occupied by [Cd(DMSO) 6 ] 2 + cations.I nterestingly, compounds 1-3 exhibit an ion-exchange behavior for the adsorption of as pecific dye (methylene blue, MB). Moreover, photocatalytic experimentsi ndicate that these iodoargentates can be considered as promisingp hotocatalysts for the degradation of organic dyep ollutants.[a] Dr.

Transition-Metal-Complex-Directed Synthesis of Hybrid Iodoargentates with Single-Crystal to Single-Crystal Structural Transformation and Photocatalytic Properties

“…Hence, the discovery of highly effective semiconductor photocatalysts is highly desirable. Organic–inorganic hybrid metal halides may function as semiconductors, − optical materials, − and phase transitions. − Among them, the iodoargentates are important metal halide hybrids with rich structural topologies and distinct properties of photo-/thermochromism − and photocatalysis. − In generally, the iodoargentate anions are composed of linear AgI 2 and AgI 3 triangles and AgI 4 tetrahedra, which may be condensed via Ag···Ag interactions and the sharing of corners, edges, and faces. − The variance of coordination geometries and connection approaches may generate numerous iodoargentates from discrete clusters (0D) to three-dimensional (3D) frameworks . Especially, the templated agents and structure-directing agents (SDAs) may provide an effective strategy to develop novel iodoargentates. ,− …”

Construction of Iodoargentates with Diverse Architectures: Template Syntheses, Structures, and Photocatalytic Properties

“…Besides that, with the nickel salt being replaced by vanadium salt, a 2D honeycomb layered network could be fabricated in compound 3 , indicating the important role of solvated metal cations in constructing diverse iodoargentates. Compared with our previous work, distinct basic units or SBUs could also lead to various architectures. The 1D chain of compound 1 is built by the interconnection of neighboring [Ag 6 I 9 ] building units via sharing Ag–I bonds.…”

Assembly of One-, Two-, and Three-Dimensional Cu(I)-Based Coordination Frameworks for Tunable White Light Emission and Effective Fluorescence Sensing

“…Extrapolation of the linear portion of the absorption edge gives the values of band gap ( E g ) for 1 – 3 with 2.34, 2.65, and 2.33 eV, respectively, which correspond to the colors of the solid samples. Comparing with the absorption edges of bulk CuBr (2.89 eV) and CuI (2.95 eV), the hybrid solids feature obvious red-shifted phenomena similar to other metal-halide-based complexes, which can be mainly ascribed to the contribution of organic moieties. − To gain insight into the relationship between optical properties and crystal structures, we have carried out theoretical studies for compound 3 (selected as an example) by using DFT theory to explore its electronic structure. As the optical property is primarily originated from the electronic transition among electronic states near the region of Fermi level, thus the occupied and unoccupied states at the top of valence band (VB) and the bottom of conduction band (CB) have been studied, respectively.…”