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An innovative intensified vitamin E (VE) recovery process from the methylated oil deodorizer distillates (MODDs) was proposed, where VE was in situ transferred into a deep eutectic solvent (DES) with an organic salt. To design the process, the chlorine based quaternary ammonium salts were primarily investigated, and [N4,4,4,4]Cl was selected as an association solvent which can efficiently form DES with α-tocopherol of the representative compound of VE. Based on the determined phase diagram of the DES freezing points, four phase regions were classified, and the effect of the [N4,4,4,4]Cl/tocopherol ratio and temperature on the extraction performance and phase transformation was figured out. Moreover, an intensified association extraction process via in situ forming DES of α-tocopherol with [N4,4,4,4]Cl was designed and validated by experiments. VE products were finally obtained from both model MODD (purity of 99.63%) and practical MODDs (purity of >79.18%), which verifies the excellent extraction efficiency for the proposed recovery method. © 2016 American Institute of Chemical Engineers AIChE J, 63: 2212-2220, 2017 [ABSTRACT FROM AUTHOR]

A metal-ion-mediated cyclization of a linear peptide to the corresponding cyclohexadepsipeptide, a stereoisomer of �hirsutellide A, was studied. The presence of AgBF4 improved the cyclization yield from 14% to 61%. The effect of silver ion on the macrocyclization was further investigated by NMR and molecular mechanics calculations. [ABSTRACT FROM AUTHOR]

A facile and efficient approach to the synthesis of secondary thioamides from ketoximes via Beckmann rearrangement has been established, using phosphorus pentasulfide as a dehydrating and thiating agent. It is also efficient for the preparation of primary thiobenzamide from benzaldoxime. This approach features simple-operation, easy-control and good to excellent yields. [ABSTRACT FROM AUTHOR]

Inverted MAPbI3 Perovskite Solar Cells with Graphdiyne Derivative-Incorporated Electron Transport Layers Exceeding 20% Efficiency In article number 1900241, Tonggang Jiu and co-workers introduce chlorine-substituted graphdiyne into MAPbI SB 3 sb -based perovskite solar cells to produce a peak efficiency of 20.34% with suppressed J-V hysteresis, which results from the interaction of derivated graphdiyne and PCBM, to be exact, four types of non-covalent bonds. These findings suggest that derivated graphdiyne could have potential applications in solar cells and other photoelectric devices. [Extracted from the article]

A new copper-catalyzed selective synthesis of N 1 - and N 2 -oxyalkylated 1,2,3-triazoles has been developed through a three-component reaction of alkynes, TMSN 3 , and ethers. Through this methodology, a series of N 1 - and N 2 -oxyalkylated 1,2,3-triazoles could be efficiently and regioselectively obtained from simple and readily available starting materials with favorable functional group tolerance.

Here we reported the doping of graphdiyne in P3CT-K in MAPbI 3 perovskite solar cells as hole-transport materials. The doping could improve the surface wettability of P3CT-K, and the resulting perovskite morphology was improved with homogeneous coverage and reduced grain boundaries. Simultaneously, it increased the hole-extraction mobility and reduced the recombination as well as improved the performance of devices. Therefore, a high efficiency of 19.5% was achieved based on improved short-circuit current and fill factor. In addition, hysteresis of the J- V curve was also obviously reduced. This work paves the way for the development of highly efficient perovskite solar cells.

In this work, PC 61 BM:SnO 2 electron transport layers (ETLs) were applied in inverted CH 3 NH 3 PbI 3 perovskite solar cells, and a high power conversion efficiency of 19.7% could be obtained. It increased by 49.0% in comparison with the device based on PC 61 BM-only ETL (13.2%). SnO 2 nanocrystals with excellent dispersibility were employed here to fill the pinholes and cover the valleys of PC 61 BM layer, forming smooth and compact PC 61 BM:SnO 2 layers. Simultaneously, the electron traps caused by deep-level native defects of SnO 2 were reduced by PC 61 BM, proved by the space charge limited current analysis. Thus, PC 61 BM:SnO 2 ETLs can inhibit both of the defects in PC 61 BM and SnO 2 layers which contribute to the electron transport improvement and reduce the recombination loss. Moreover, the device stability based on the bilayer was significantly improved in comparison with the PC 61 BM-only device and the performance of 85% could be maintained after 1 month.