For pure acetylene manufacturing and natural gas purification, the development of porous materials displaying highly selective C 2 H 2 /CH 4 and CO 2 /CH 4 separation is greatly important but remains a major challenge. In this work, a plausible strategy involving solvent-induced effects and using the flexibility of the ligand conformation to make two In(III) metal−organic frameworks (MOFs) is developed, showing topological diversity and different stability. The X-shaped tetracarboxylic ligand H 4 TPTA ([1,1′:3′,1″-terphenyl]-4,4′,4″,6′-tetracarboxylic acid) was selected to construct two new heteroid In MOFs, namely, {[showing a pts topology with a large channel that is not conducive to fine gas separation. By contrast, with the reduction of SBU from uninucleated In to an {In-OH-In} n chain, MOF 2 has a (4, 6)connected net with the fsc topology with an ∼5 Å suitable micropore to confine matching small gas. The permanent porosity of MOF 2 leads to the preferential adsorption of C 2 H 2 over CO 2 with superior C 2 H 2 /CH 4 (332.3) and CO 2 /CH 4 (31.2) separation selectivities. Meanwhile, the cycling dynamic breakthrough experiments showed that the high-purity C 2 H 2 (>99.8%) capture capacities of MOF 2 were >1.92 mmol g −1 from a binary C 2 H 2 /CH 4 mixture, and its separation factor reached 10.

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In this work, highly effective and rapid removal of cationic carcinogenic organic dye molecules is achieved through the implementation of a novel anionic metal–organic framework (MOF). Benefit from reticular chemistry, an anionic pts topology‐directed MOF [CH3NH3][In (TPTAB)4]·solvents (In‐TPTAB, H4TPTAB = [1,1′:3′,1″‐terphenyl]‐4,4′,4″,6′‐tetracarboxylic acid) has been solvothermally synthesized. The structural characteristics of high porosity and the large size 1D channel modified by uncoordinated O sites promote In‐TPTAB to be a promising adsorbent material. By ion exchange, In/Cu‐TPTAB exhibits obviously increased BET surface area (248 m2 g−1) compared with In‐TPTAB (55 m2 g−1). More importantly, In‐TPTAB presents commendable performances with the maximum adsorption capacities for toxic dye BR9 and MLB are up to 368 and 304 mg g−1, and the adsorption rates are 10.9 and 6.7 mg g−1 min−1, respectively. It is noteworthy that the high‐efficiency capacity of In‐TPTAB in capturing dyes surpasses many reported adsorbent materials. The mechanism of physical adsorption can be ascribed to the synergistic effect of multiple host‐guest interactions. Coupled with the good recyclable, push In‐TPTAB to be potential used for the removal of cationic organic pollutants

Stable metal−organic frameworks, containing periodically arranged nanosized cages or pores and active Lewis acid− base sites, are considered ideal candidates for efficient heterogeneous catalysis. Herein, based on the light of reticular chemistry design principles, the ingenious assembly of two pyridine N-rich multifunctional triangular linkers, H 3 TBA [3, benzoic acid] and H 2 TZI [5-(1H-tetrazol-5-yl)isophthalic acid], with Mn II formed PCP-33(Mn) and PCP-34(Mn), respectively. PCP-33(Mn) and PCP-34(Mn) are typical sod topology zeolitic metal−organic frameworks (ZMOFs) with hierarchical tetragonal micropores and metal organic polyhedral sodalite-like cages. The inner walls of these cages are modified by open metal sites Mn II and Lewis acid−base sites of halide ions and N pyridine atoms. The characteristics of the cages' structures make two MOFs exhibit high surface area and a small window, which promote their outstanding gas capture ability (C 2 H 2 , 131.8 cm 3 g −1 ; CO 2 , 77.9 cm 3 g −1 at 273 K) and selective separation performance (C 2 H 2 /CH 4 , 226.2, CO 2 /CH 4 , 50.3 at 298 K), and are also suitable as catalytic reactors for metal/solvent-free chemical fixation of CO 2 with epoxides to achieve high-efficiency CO 2 conversion. Furthermore, they are greatly recyclable for several cycles while retaining their structural rigidity and catalytic activity.