有机硫化物在低功率光照射下由金属酞菁酸包盖的三维金属三吡啶肟酸盐光催化氧化成亚砜

IF 4.2 3区 工程技术 Q2 CHEMISTRY, APPLIED
Daria A. Polivanovskaia , Semyon V. Dudkin , Svetlana A. Belova , Ivan A. Skvortsov , Ekaterina G. Lebed , Kirill P. Birin , Aslan Yu. Tsivadze , Yan Z. Voloshin
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引用次数: 0

摘要

以2-乙酰吡啶肟为螯合配体,等摩尔量的金属(IV)酞菁酸盐(M(IV)Zr(IV), Hf(IV))作为封盖刘易斯酸剂,以相应的3d金属离子为基体,通过模板缩合,制备了一系列以铁、镍和钴为中心的锆和铪(IV)酞菁酸盐包封的三吡啶肟酸盐,产率从中等到较高。在钴配合物的情况下,初始Co2+离子的氧化发生在模板自组装反应的过程中。盖层和包覆金属离子的变化会影响其光化学性质、光稳定性和光催化活性。这种类型的铁和镍(II)为中心的配合物在光照射下是最稳定的。酞菁酸锆包覆的三吡啶肟酸镍在亚砜化反应中具有优异的光催化活性。选择性催化多种有机硫化物的氧化,如芳香族、脂肪族和环状底物,以及易氧化取代基。以硫氮唑和二苄基亚砜为底物,进行了大规模(10 mmol)的氧化实验,分离得到的目标亚砜衍生物的收率为98 ~ 99%,催化周转率高达2·104。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oxidation of organic sulfides into sulfoxides under low-power light irradiation photocatalyzed by metallophthalocyaninate-capped 3d-metal tris-pyridineoximates
A series of iron-, nickel(II)- and cobalt(III)-centered zirconium- and hafnium(IV)phthalocyaninate-capped tris-pyridineoximates was prepared in their yields from moderate to relatively high using the template condensation of 2-acetylpyridineoxime as a chelating ligand synthon with equimolar amount of metal(IV)phthalocyaninate (M(IV)Zr(IV), Hf(IV)) as a capping Lewis acidic agent on the corresponding 3d-metal ion as a matrix. In the case of cobalt complexes, an oxidation of the initial Co2+ ions occurred in a course of the template self-assembly reactions. Variation of both the capping and the including encapsulated metal ions were found to affect their photochemical properties, photostability and photocatalytic activity. Iron- and nickel(II)-centered complexes of this type are most photostable under a light irradiation. The zirconium(IV)phthalocyaninate-capped nickel(II) tris-pyridineoximate possesses an excellent photocatalytic activity in the tested sulfoxidation reactions. It selectively catalyzes oxidation of a wide range of various organic sulfides, such as aromatic, aliphatic and cyclic substrate, as well as those with substituent prone to oxidation. In the performed large-scale (10 mmol) oxidation experiments with thioanizole and dibenzylsulfoxide as the substrates, the isolated yields of their target sulfoxide derivatives became of 98–99 % with the catalytic turnover numbers up to 2·104.
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来源期刊
Dyes and Pigments
Dyes and Pigments 工程技术-材料科学:纺织
CiteScore
8.20
自引率
13.30%
发文量
933
审稿时长
33 days
期刊介绍: Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.
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