Construction of Four Indium‐Based Heterometallic Metal–Organic Frameworks Containing Intersecting Indium–Organic Helical Chains and Different Divalent‐Metal‐Ion Linkers

Abstract

Four indium‐based heterometallic metal–organic frameworks In3M(IMDC)3(NO3)2(H2O)6·solvent (2‐M, M = Mn, Co, Zn, Mg, H3IMDC = imidazole‐4,5‐dicarboxylic acid) have been made under solvothermal conditions, and are characterized by single‐crystal X‐ray diffraction studies, energy‐dispersive X‐ray spectroscopy, infrared spectroscopy, thermogravimetric analysis, and powder X‐ray diffraction analysis. Structural analysis indicates that 2‐M exhibit 3D porous frameworks generated by linking three intersecting 1D In–IMDC helical chains with different M2+ ions. Powder X‐ray diffraction studies reveal that 2‐M exhibit good thermal and water stability. Furthermore, 2‐M show moderate gas adsorption abilities that can be modulated by introducing different M2+ ions. Finally, the solid‐state luminescent emissions of 2‐M at room temperature are also elucidated.

Nitrogen Coordination To Dramatically Enhance the Stability of In-MOF for Selectively Capturing CO2 from a CO2/N2 Mixture

“…In the absence of acetic acid, compound 1 could not be obtained under similar conditions. It can also be seen that the N atom disconnects from the In 3+ center, which may be a potential coordination site for further enhancing the stability of the MOFs by the formation of In–N bonds. ,− …”

“…In this process, TM 2+ -N MOFs are usually more stable than TM 2+ -carboxylate MOFs. Tetravalent and trivalent TM cations, such as Zr 4+ and In 3+ , usually tend to form MOFs with TM-O coordination modes by forming six- to eight-coordinate environments. − However, in comparison to the number of TM 2+ - and Zr 4+ -based MOFs, In 3+ -based MOFs are comparatively fewer in number in literature reports. − In this field, the In 3+ ions were used to react with organic di-, tri-, and tetracarboxylic ligands, resulting in several In-based 2D and 3D frameworks, − which have been widely used for gas separation, pollutant removal, and catalytic reactions. , Among these structures, it could be found that most of the In 3+ centers tend to coordinate with carboxylate oxygen atoms, although several ligands contain N and S heteroatoms. ,,, To date, the design and synthesis of In-based framework materials are still in their infancy and represent a promising way to construct stable MOFs for various applications, especially for introducing polydentate ligands with both carboxylate and N-heterocyclic rings into the In-MOFs to promote the formation of In–N bonds …”

Heterometallic Organic Frameworks Built from Trinuclear Indium and Cuprous Halide Clusters: Ligand-Oriented Assemblies and Iodine Adsorption Behavior

“…Recently, two types of isomorphic indium-based heterometallic organic frameworks built by 1,3,5-benzenetricarboxylic acid and imidazole-4,5dicarboxylic acid have been synthesized in our gourp. 14,15 Herein, we designed and synthesized two novel heterometallic cluster-based organic frameworks built from trinuclear indium a n d c u p r o u s h a l i d e c l u s t e r s , i . e .…”

“…Therefore, the heterometallic MOFs constructed from indium and copper iodide clusters remain at the beginning. Recently, two types of isomorphic indium-based heterometallic organic frameworks built by 1,3,5-benzenetricarboxylic acid and imidazole-4,5-dicarboxylic acid have been synthesized in our gourp. , Herein, we designed and synthesized two novel heterometallic cluster-based organic frameworks built from trinuclear indium and cuprous halide clusters, i.e., [(In 3 O) 2 (Cu 2 I 2 ) 3 (ina) 12 (H 2 O) 6 ]­(NO 3 ) 2 ·7DMA·10H 2 O ( 1 ) and [NH 2 (CH 3 ) 2 ]­[In 3 (OH) 2 (H 2 O) 2 (ina) 8 (Cu 4 I 4 ) 2 ]·5DMA·8H 2 O ( 2 ). Interestingly, 1 displays a 3D cationic skeleton, which is built from a planar [In 3 O­(CO 2 ) 6 ] trimer and a rhombohedral Cu 2 I 2 cluster.…”

A Multi‐Responsive Cd–Viologen Complex: Photochromism, Photomodulated Fluorescence, and Luminescent Sensing

“…Metal–organic frameworks (MOFs), which are built by rationally connecting the functional organic linkers with inorganic metal nodes, have shown promising applications and potentials in many fields, such as fluorescence sensing, gas adsorption separation, catalytic, and so on . MOFs have demonstrated several advantages including rational preparation, good chemical stability, high surface area, and highly selective pores with specific size and shape ,. The rational designed linkers and crystal engineering theory make MOFs excellent candidates for the construction of multi‐responsive luminescent materials with remarkable sensing abilities…”