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Acetylene (C2 H2 ) capture is a step in a number of industrial processes, but it comes with a high-energy footprint. Although physisorbents have the potential to reduce this energy footprint, they are handicapped by generally poor selectivity versus other relevant gases, such as CO2 and C2 H4 . In the case of CO2 , the respective physicochemical properties are so similar that traditional physisorbents, such as zeolites, silica, and activated carbons cannot differentiate well between CO2 and C2 H2 . Herein, we report that a family of three isostructural, ultramicroporous (

Two anion-directed Cu(I) coordination polymers (CPs), namely, [Cu2(TMBP)2(μ-CN)(I)·3.5H2O]n (1, TMBP = 3,3′,5,5′-tetramethyl-4,4′-bipyrazole) and [Cu2(TMBP)2(μ-SCN)(μ-CN)]n (2), were synthesized through solvothermal method and characterized by single crystal and powder X-ray diffraction, elemental analysis. 1 is a 3-dimension framework with nanocavity and (42 · 63 · 8) topology while 2 is a 2-dimension network with 3-fold penetration and (62 · 10)(6.6) topology, the difference in structure being related to the anions (I− or SCN−) included in precursor solution. Furthermore, 1 exhibits strong blue emission when excited at 315 nm, which should be resulted from I to Cu(I) charge transfer; however, no obvious luminescence was observed in case of 2. This work emphasizes a strategy of anion-directed synthesis of CPs for tuning photoluminescent property.

The series of highly stable porous solids here feature systematic, regiospecific sulfur substitutions on the organic linkers for versatile functions. One major surprise lies in the controllable sequential reactions between sodium thiomethoxide (NaSMe) and octafluorobiphenyl-4,4'-dicarboxylic acid (H

Breaking the cycle of silver pyrazolates: instead of the common loops (e.g., the Ag3N6 ring), we report an infinite array in which the equispaced Ag(I) ions form a zigzag chain, with the associated anthracene bis(pyrazolate) linkers cofacially aligned one to another. In addition to the strong Ag(I)–N bonds and the distinct argentophilic interactions, the Ag(I) ions also form interlayer, metal−π contacts with the anthracene cores. The resultant two-dimensional network exhibits significant electronic interaction between the Ag(I) centers and the large aromatic linker molecule, as revealed by the red shift of photoemission spectra and the significant reduction of the electronic band edge as determined by diffuse reflectance spectroscopy. The solid sample is stable in air and water.

A porous Zr(IV)-based metal-organic framework, namely Zr-TNDC, has been prepared by the reaction of zirconium salt and 1,5-bis(methylthio)naphthalene-2,6-dicarboxylic acid through solvothermal method. The existent methylthio groups provide a platform for post-synthetic modification, therefore oxidized Zr-TNDC-Ox and further acidified H@Zr-TNDC-Ox were successfully prepared. Electrochemical impedance spectroscopy was performed to evaluate the proton conductivity of synthesized materials. Importantly, H@Zr-TNDC-Ox exhibited a highly improved proton conductivity of 3.16 ​× ​10−2 ​S ​m−1 at 90 ​°C and 95% RH in comparison to the pristine Zr-TNDC (7.88 ​× ​10−5 ​S ​m−1). Proton conductivities at different relative humidity and temperatures were also measured and Arrhenius equation was used to investigate the proton conduction process. It indicated that all of the synthesized framework materials correspond to Grotthuss mechanism.