Ethylene (C2H4) purification from multi-component mixtures by physical adsorption is a great challenge in the chemical industry. Herein, we report a GeF62- anion embedded MOF (ZNU-6) with customized pore structure and pore chemistry for benchmark one-step C2H4 recovery from C2H2 and CO2. ZNU-6 exhibits significantly high C2H2 (1.53 mmol/g) and CO2 (1.46 mmol/g) capacity at 0.01 bar. Record high C2H4 productivity is achieved from C2H2/CO2/C2H4 mixtures in a single adsorption process under various conditions. The separation performance is retained over multiple cycles and under humid conditions. The potential gas binding sites are investigated by density functional theory (DFT) calculations, which suggest that C2H2 and CO2 are preferably adsorbed in the interlaced narrow channel with high aff0inity. In-situ single crystal structures with the dose of C2H2, CO2 or C2H4 further reveal the realistic host-guest interactions. Notably, rare C2H2 clusters are formed in the narrow channel while two distinct CO2 adsorption locations are observed in the narrow channel and the large cavity with a ratio of 1:2, which accurately account for the distinct adsorption heat curves.

Multifunctional switching materials show great potential for applications in sensors, smart switches, and other fields due to the ability of integrating different physical channels in one single device. However, multifunctional...

Among the stimuli-responsive materials, thermochromic materials have received tremendous scientific attention. However, traditional organic or inorganic thermochromic materials need a complex preparation process and possess a single performance. Herein, we report a new 1D organic−inorganic hybrid material, lead iodide hybrid, [PbI 4 •4-MAPY] (CP-1) (4-MAPY = pyridin-4-ylmethanamine), with line-sharing PbI 6 octahedral chains and excellent reversible thermochromic properties (transition between lemon yellow and carmine red). In addition, the results of experimental and theoretical calculations illustrate that [PbI 4 •4-MAPY] is an indirect band gap semiconductor, and the band structures are contributed by inorganic chains. Overall, this work might afford a strategy for the detection of new dielectric and thermochromic switchable materials.

Organic‐inorganic Hybrid (OIH) materials for multifunctional switchable applications have attracted enormous attention in recent years due to their excellent optoelectronic properties and good structural tunability. However, it still remains challenging to fabricate one simple OIH compound with multi‐functionals properties, such as dielectric switching, thermochromic properties, semiconductor characteristics and ferroelasticity. Under this context, we successfully synthesized [2‐(2‐fluorophenyl)ethan‐1‐ ammonium]2SnBr6 (compound 1), which has a higher phase transition temperature of 427.7 K. Additionally, it exhibits a semiconducting property with an indirect band gap of 2.36 eV. Combining ferroelastic, narrow band gap, thermochromic, and dielectric properties, compound 1 can be considered as a rarely reported multi‐functional ferroelastic material, which is expected to give inspiration for broadening the applications in the smart devices field.

Organic–inorganic halide perovskites (OIHPs) are very eye-catching due to their chemical tunability and rich physical properties in ferroelectricity, magnetism, photovoltaic and photoluminescence. However, no nickel-based OIHP ferroelectrics have been reported...