94-67-7Relevant articles and documents
Octamolybdate-based hybrids for direct conversion of aldehydes and ketones to oximes
Han, Pei Pei,Li, Jie,Xing, Cui Li,Zhao, Meng,Han, Qiu Xia,Li, Ming Xue
, (2019)
Two inorganic-organic hybrid materials, [Co(L)2]2Na2[β-Mo8O26]·9H2O (1) and [Fe(L)2]2Na2[β-Mo8O26]·9H2O (2) (HL = 2-acetylpyrazine N4-methyl thiosemicarbazone) have been synthesized and characterized by elemental analyses, infrared (IR) spectroscopy, thermal gravimetric analysis (TGA), powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction. The hybrids 1 and 2 were explored in the oximation of aldehydes and ketones with in situ generated hydroxylamine by a one-pot procedure. In the crystal structures of 1 and 2, N-containing thiosemicarbazide ligands, Lewis acid, and oxidation catalyst octamolybdate coexist within a confined space providing a promising synergistic catalytic way. Hybrids 1 and 2 displayed high catalytic activity and selectivity for the oximation of aldehydes and ketones.
Catalytic performance of a square planar nickel complex for electrochemical‐ and photochemical‐driven hydrogen evolution from water
Du, Juan,Wang, Chun-Li,Yang, Hao,Zhan, Shu-Zhong
, (2021)
A square planar nickel complex bearing salicylketoxime (SAO), Ni-SAO has been synthesized and well characterized by ESI-MS and single-crystal X-ray diffraction, etc. Ni-SAO exhibits good activity in both electrocatalytic and photocatalytic hydrogen evolution reaction (HER). Under an overpotential (OP) of 837.6 mV, Ni-SAO can electrocatalyze hydrogen evolution from a neutral aqueous buffer with a turnover frequency (TOF) of 1428 mol of hydrogen per mole of catalyst per hour (mol H2 /mol catalyst/h). Moreover, under blue light (λ = 469 nm), a three-component system containing Ni-SAO as a catalyst, CdS nanorods (CdS NRs) as a photosensitizer, and ascorbic acid (H2A) as a sacrificial electron donor also can afford hydrogen with a turnover number (TON) of 8138 mol H2 per mol of catalyst (mol of cat?1) during 48 h irradiation. The highest apparent quantum yield (AQY) is about 16.5% at 469 nm.
Photophysical properties of a boron analogue of coumarin
Schrage, Briana R.,Takematsu, Kana,Wang, Huayi,Ziegler, Christopher J.
, p. 18855 - 18862 (2021)
In this report, we present a study into the structure and electronic properties of difluoroboronsalicylaldoxime (DFBS), a boron-based structural analog of coumarin. The modification of the heterocyclic ring of coumarin with boron results in a compound with similar structural parameters and molecular orbitals to coumarin. DFT and TDDFT calculations reveal a significant stabilization of the LUMO in DFBS; this is supported by a ～40 nm red shift of the lowest electronic transition in the absorption spectrum. Interestingly, DFBS is emissive, while unmodified coumarin is effectively non-radiative. Comparisons between DFBS, emissive coumarin variants, and unmodified coumarin suggest that the charge transfer character of the transition contributes to the fluorescence. This journal is
Method for preparing 2-hydroxy-benzonitril by adopting micro-flow field technology
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Paragraph 0022; 0045-0047, (2021/08/14)
The invention discloses a method for preparing 2-hydroxy benzonitrile (o-hydroxy benzonitrile) by adopting a micro-flow field technology, which comprises the following steps: (1) dissolving hydroxylamine hydrochloride in a solvent, adding salicylaldehyde, and fully stirring and uniformly mixing to obtain a reaction solution; and (2) pumping the uniformly mixed reaction liquid into the micro-channel reactor by adopting single-strand feeding, and carrying out one-step reaction to obtain a 2-hydroxy-benzonitrile crude product. Compared with a traditional preparation method of the 2-hydroxy-benzonitrile, the method has the advantages that the use of a dehydrating agent is avoided, the reaction time is short, the conversion rate of the 2-hydroxy-benzonitrile is high, the operation is simple, the safety is high, and the method is suitable for industrial production.
METHODS OF FORMING IMINES, IMINE-RELATED AND IMINE-DERIVED COMPOUNDS USING GREEN SOLVENTS
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Paragraph 0180-0183, (2021/10/22)
The present disclosure relates to using green solvents to synthesize an array of imines, imine-related and imine-derived compounds in an efficient and eco-friendly matter, satisfying green chemistry requirements. Reaction embodiments are performed using solvents, such as ethyl lactate and dimethyl isosorbide, which are both individually characterized as green. In embodiments, solvents include lactic whey and/or water as co-solvents. In these green solvents, the synthesis process discussed herein can produce up to quantitative yields of product at room temperature in a short duration. Embodiments include a method of forming an imine, imine-related or imine-derived compound product. In embodiments, the methods include mixing an aldehyde reactant with a nucleophilic/nitrogen-containing reactant in a green solvent at a temperature between negative twenty degrees Celsius (?20° C.) and positive fifty degrees Celsius (50° C.); stirring the mixture; and forming an imine, imine-related or imine-derived compound product.
