Nowadays the knowledge of thermodynamic properties for amino acid ionic liquids (AAILs) has been paramount for the design of many chemical processes. In this present work, a series of cholinium-based AAILs ([Ch][AA]) were synthesized by neutralization of choline hydroxide solution with five amino acids and then were characterized by 1 H NMR, Fourier transform infrared (FT-IR), elemental analysis, thermogravimetry, and differential scanning calorimetry (DSC) analysis. Physico-chemical properties such as density, viscosity, refractive index, and conductivity were measured and correlated with the empirical equations in a wide temperature range. The thermal expansion coefficient values were also calculated from the acquired experimental density values. From the experimental data, it was found that the density, viscosity, and refractive index decreased while conductivity increased with the increase of temperature. The correlation results were proposed to be in good agreement with the experimental data, and optimal fitting parameters were presented. In addition, the coefficient of thermal expansion was considered to be independent of temperature in the range of (298.15 to 353.15) K.

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A new strategy for multi-molar absorption of CO2 is reported based on activating a carboxylate group in amino acid ionic liquids. It was illustrated that introducing an electron-withdrawing site to amino acid anions could reduce the negative inductive effect of the amino group while simultaneously activating the carboxylate group to interact with CO2 very efficiently. An extremely high absorption capacity of CO2 (up to 1.69 mol mol(-1) ) in aminopolycarboxylate-based amino acid ionic liquids was thus achieved. The evidence of spectroscopic investigations and quantum-chemical calculations confirmed the interactions between two kinds of sites in the anion and CO2 that resulted in superior CO2 capacities.

in Wiley Online Library (wileyonlinelibrary.com)Amino acid ionic liquids (AAILs) are chemical solvents with high reactivity to CO 2 . However, they suffer from drastic increase in viscosity on the reaction with CO 2 , which significantly limits their application in the industrial capture of CO 2 . In this work, 1-ethyl-3-methylimidazolium acetate ([emim][Ac]) which also exhibits chemical affinity to CO 2 but low viscosity, and its viscosity does not increase drastically after CO 2 absorption, was proposed as the diluent for AAILs to fabricate hybrid materials. The AAIL1[emim][Ac] hybrids were found to display enhanced kinetics for CO 2 absorption, and their viscosity increase after CO 2 absorption are much less significant than pure AAILs. More importantly, owing to the fact that [emim][Ac] itself can absorb large amount of CO 2 , the AAIL1[emim][Ac] hybrids still have high absolute capacities of CO 2 . Such hybrid materials consisting of a chemical solvent plus another chemical solvent are believed to be a class of effective absorbents for CO 2 capture. a The mass fraction of [Ch][Pro] is 50%. b The mass fraction of [C 2 (N 114 ) 2 ][Gly] 2 is 40%. c The mass fraction of [N 1111 ][Gly] 2 is 40%. d The mass fraction of [C 2 OHmim][Gly] is 8%. e The mass fraction of [APmim][Gly] is 11%. f The mass fraction of DAIL is 50%. g The mass fraction of [DETA][Cl] is 36%. h The mass fraction of [P 4444 ][Gly] is 41%. i The mass fraction of [aP 4443 ][Gly] is 41%. j The mass fraction of [emim][Lys] is 49%. k The mass fraction of [emim][Gly] is 50%. l The mass fraction of MEA is 30%. m The mass fraction of MDEA is 50%. Figure 9. FTIR spectra of fresh and recycled [emim] [Gly]1[emim] [Ac].[Color figure can be viewed at wileyonlinelibrary.com]

Scheme 1. Chemical structures of the anion and the cation in aminopolycarboxylate-based ionic liquids.

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The development of a general synthesis approach for creating fine alloyed nanoparticles (NPs) in the pores of metal–organic frameworks (MOFs) shows great promise for advanced synergetic catalysis but has not been realized so far. Herein, for the first time we proposed a facile and general strategy to immobilize ultrafine alloyed NPs within the pores of an MOF by the galvanic replacement of transition-metal NPs (e.g., Cu, Co, and Ni) with noble-metal ions (e.g., Pd, Ru, and Pt) under high-intensity ultrasound irradiation. Nine types of bimetallic alloyed NPs of base and noble metals were successfully prepared and immobilized in the pores of MIL-101 as a model host, which showed highly dispersed and well-alloyed properties with average particle sizes ranging from 1.1 to 2.2 nm and high loadings of up to 10.4 wt %. Benefiting from the ultrafine particle size and high dispersity of Cu–Pd NPs and especially the positive synergy between Cu and Pd metals, the optimized Cu–Pd@MIL-101 exhibited an extremely high activity for the homocoupling reaction of phenylacetylene under unprecedented base- and additive-free conditions and room temperature, affording at least 19 times higher yield (98%) of 1,4-diphenylbuta-1,3-diyne than its monometallic counterparts. This general strategy for preparing various MOF-immobilized alloyed NPs potentially paves the way for the development of highly active metal catalysts for a variety of reactions.

Nanozyme‐based chemodynamic therapy (CDT) has emerged as an effective cancer treatment because of its low side effects and without the requirement of exogenous energy. The therapeutic effect of CDT highlights the pivotal importance of active sites, H2O2 supplement and the glutathione (GSH) depletion of a nanozyme. The construction of a single kind of catalyst with multiple functions for the enhanced CDT is still a big challenge. In this work, seven types of bimetallic nanoparticles are synthesized using a metal–organic framework (MOF) as a stable host instead of a Fenton or Fenton‐like ions supplier. Among them, Cu‐Pd@MIL‐101 with an alloy loading of 9.5 wt% modified by PEG (9.5% CPMP) is found to exhibit the highest peroxidase (POD) like activity combined with a superoxide dismutase (SOD) mimic activity and the function of GSH depletion. The in vivo results suggest that the stable and ultrafine nanoparticles possess favorable CDT effect for tumor and good biosafety as well as biocompatibility. This work has provided a credible strategy to construct nanozymes with an excellent activity and may pave a new way for the design of enhanced tumor CDT treatment.