Cobalt ionic liquids with highly efficient and reversible absorption of NH3 through Lewis acid–base and hydrogen bond interactions were designed.

The mechanochromism of two phenothiazine-based benzoxazole derivates (PVB and BPVB) was compared. The ground film of PVB without bromine atoms can self-cure within 15 min at room temperature, while the ground film for BPVB showed no changes for at least 2 weeks.

A triphenylamine-based benzoxazole derivative exhibits a low contrast piezofluorochromic behavior under external pressure, and a high-contrast fluorescence change induced by protonation can be observed.

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Solubilities of SO 2 in ethylene glycol derivatives were determined by dynamic isothermal gas-liquid equilibrium (GLE) experiments, and the thermodynamic parameters of the absorption processes were calculated. The GLE results indicated that the solubilities of SO 2 in ethylene glycol derivatives increase in the order: diols < monomethyl ethers < dimethyl ethers, with the enthalpy values ranging from À23.2 to À43.3 kJ mol À1 . The regeneration experiment found that the absorption of SO 2 in tetraethylene glycol dimethyl ether is reversible, and the solvents can be reused without a significant loss of absorption capacity. The interactions between SO 2 and ethylene glycol derivatives were investigated by UV, IR and NMR. In addition, a 1 H-NMR spectroscopy technique with external references was used to investigate the physical absorption process of SO 2 for the first time, in order to avoid the influence of deuterated solvents. Spectroscopic investigations showed that the interactions between SO 2 and ethylene glycol derivatives are based on both the charge-transfer interaction and hydrogen bond. Ethylene glycol derivatives with desirable absorption capacities and excellent regeneration abilities are promising alternatives to conventional sorbents in SO 2 separation.

A hydrogen bonded complex could self-assemble into one-dimensional fibers in its gel phase. The fibrous film could be used as a sensor to detect and discriminate aromatic and aliphatic amines.

The combination of ionic liquids (ILs) and metal organic frameworks (MOF) as a new type of hybrid ionic conductor has raised extensive concern. Novel solid electrolytes with high ionic conductivities and good cycle performance have been successfully synthesized by loading ILs into nanoarchitectures of MOF materials. In this work, two highly conductive ILs, 1-ethyl-3-methylimidazolium thiocyanate ([Emim]­[SCN]) and 1-ethyl-3-methylimidazolium dicyanamide ([Emim]­[DCA]), were embedded into the pores of MIL-101 via an effective soaking-volatilizing method. Using this method, a series of IL@MIL-101 composites with different IL contents were obtained. The effects of IL amount on pore volume, stability, morphology, and conductivity were investigated. The results showed that the conductivity of the composites improved with increasing the amount of ILs. When the pores of MIL-101 material are fully filled with [Emim]­[SCN], the ionic conductivity of the composites can reach up to 6.21 × 10–3 S·cm–1 at 150 °C under a N2 atmosphere, which is higher than traditional solid electrolytes. And the activation energy of this sample is estimated to be 0.18 eV, which is as low as other IL@MOF conductive composites. It is noteworthy that the IL@MOF hybrid composites can be regarded as promising ionic-conductors due to the value of high conductivity and low activation energy.

A glutamide gelator, 1, was synthesized, and a weak emission enhancement was observed during its gelation. In addition, 1 could be an excellent scaffold for successfully embedding an energy acceptor, 2, into its aggregate to obtain highly efficient energy transfer. An amplification of the emission enhancement was observed in the two-component gels compared to that of the neat gel of 1 during gel formation. For example, 1 induced only a 2.5-fold increase in emission intensity, whereas a 23-fold enhanced emission could be observed in the two-component gel with only 1.6 mol % 2. Furthermore, two-component gels had an excited proton response. In systems with low acceptor concentrations, the hot solution red-shifted the fluorescence from blue to yellow upon the addition of a proton, which continuously blue-shifted with decreasing temperature to form the gel given that the binding of the gelator to the proton is weakened during coassembly. Moreover, the casting film formed by the two-component wet gel had an excellent response to volatile acids such as hydrochloric acid, trifluoroacetic acid, and so on and could be reversibly recovered by exposure to NH(3).