A detailed nondestructive analytical method for quantitative food analysis was established by using a selffabricated NIR-LED light source combined with Mg 3 Ga 2 GeO 8 (MGGO) phosphor and a blue LED chip in one package, which can be integrated into smartphones. The phosphor of MGGO:Cr 3+ exhibits ultra-broadband NIR emission in the range of 650−1200 nm, which matches well with the overtones of molecular vibrations (e.g., O−H, C−H, and N−H) presented in food composition. The detailed crystal structure of MGGO was investigated by powder XRD Rietveld refinements, HRTEM images, and the corresponding SAED. Luminescence properties based on different Cr 3+ ions positions were investigated according to Gaussian peak fitting. Owing to the NIR response to organic elements, the working curves between absorbance and water content as well as sugar degree of pears and bananas were plotted. Then the reliability and veracity of the nondestructive analytical method were evaluated (R 2 = 0.9988). All the results suggest that the ultra-broadband NIR emission of MGGO:Cr 3+ phosphor has potential application as light sources integrated into smartphones for nondestructive food analysis.

We have performed ionothermal reactions between Zn(NO3)2 and H3BTC in 1-alkyl-3-methylimidazolium bromide ionic liquids with the alkyl group varying from ethyl to amyl. Six 3-D metal-organic frameworks (MOFs), including two isomeric compounds [Zn3(BTC)2(H2O)2] x 2H2O (1 and 2) (H3BTC = 1,3,5-benzenetricarboxylate acid), [EMI][Zn(BTC)] (3) (E = ethyl, MI = 3-methylimidazolium), [PMI][Zn(BTC)](4) (P = propyl), [BMI]2[Zn4(BTC)3(OH)(H2O)3] (5) (B = butyl), and [AMI][Zn2(BTC)(OH)Br] (6) (A = amyl), have been synthesized and structurally characterized. Compounds 1 and 2 are isomeric compounds, in which the coordination modes of Zn atoms and the BTC3- ligands are considerably different. Compounds 3-6 crystallize with the corresponding ionic liquid cations incorporated in the frameworks. Their crystal structures show various features including various coordination geometries of Zn2+ and various bridging modes of the BTC3- ligands. The incorporated cations appear to have strong interactions with the frameworks.

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It was found that Mo-doped Ni2P hollow nanostructures display excellent hydrogen evolution reaction and oxygen evolution reaction performance.

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A non-enzymatic electrochemical glucose sensor based on a Cu-based metal-organic framework (Cu-MOF) modified electrode was developed. The Cu-MOF was prepared by a simple ionothermal synthesis, and the characterizations of the Cu-MOF were studied by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), single-crystal X-ray powder diffraction (SCXRD), and X-ray powder diffraction (XRD). Electrochemical behaviors of the Cu-MOF modified electrode to glucose were measured by differential pulse voltammetry (DPV). The electrochemical results showed that the Cu-MOF modified electrode exhibited an excellent electro-catalytic oxidation towards glucose in the range of 0.06 mM to 5 mM with a sensitivity of 89 mA/mM cm 2 and a detection limit of 10.5 nM. Moreover, the fabricated sensor showed a high selectivity to the oxidation of glucose in coexistence with other interferences. The sensor was satisfactorily applied to the determination of glucose in urine samples. With the significant electrochemical performances, MOFs may provide a suitable platform in the construction of kinds of electrochemical sensors and/or biosensors and hold a great promise for sensing applications.

Ni(OAc)(2)-H(3)BTC system in various ionic liquids, [RMI]X (R = ethyl, n-propyl, n-butyl; X = Cl, Br, I), produced five MOFs in two structure types; their relative thermodynamic stability varies with the size of RMI(+), and the X(-) ions govern the kinetic factors so that their combination effects determine the final product.

An unprecedented series of Mn2+-based metal–organic framework (MOF) materials prepared and isolated in ionic liquids (ILs) is reported. Ionothermal reactions of Mn(OAc)2 with H3btc (benzene-1,3,5-tricarboxylic acid) in two groups of [rmi]X (rmi = 1-alkyl-3-methylimidazolium; r = ethyl or propyl, X = Cl, Br, or I) ILs produced three slightly different 3D MOFs formulated as [rmi][Mn(btc)] [r = ethyl (1), propyl (2), and (3)], whose architectures can be envisaged as (3,6)-connected pyr topological nets. Compounds 1–3 are the preferred products when the metal center is half filled d-shelled Mn with the cations of ILs being [emi]+ or [pmi]+. The comparison of the ionothermal synthesized M-btc systems suggests a significant combinatorial influence of metal-direction and ILs’ cationic template, contrasting with subtle effect of ILs’ halides on the MOF structures.