设计了温和的NABH 4 / I 2策略,可以轻松地将荧光素还原为二氢荧光素醇和酸。使用辣根过氧化物酶/ H 2 O 2作为产生反应性自由基物质的模型系统,与酸形式相比,二氢荧光素醇对氧化应激感测的反应性出乎意料地增强。最后,使用我们优化的还原方法合成了两种双功能探针,这些探针显示了亚细胞氧化应激荧光成像的巨大潜力。
Synthesis of 1,4-Dicarbonyl Compounds from Silyl Enol Ethers and Bromocarbonyls, Catalyzed by an Organic Dye under Visible-Light Irradiation with Perfect Selectivity for the Halide Moiety over the Carbonyl Group
We report the visible-light-induced radical coupling reaction of silyl enol ethers with α-bromocarbonyl compounds to give 1,4-dicarbonyls. The reaction was effectively accelerated using an inexpensive organic dye (eosin Y) as a photoredox catalyst. 1,4-Dicarbonyl compounds alone were afforded, without the generation of carbonyl adducts of the α-halocarbonyls, which are usually generated in the presence
A Biomimetic Principle for the Chemical Modification of Metal Surfaces: Synthesis of Tripodal Catecholates as Analogues of Siderophores and Mussel Adhesion Proteins
作者:Elisa Franzmann、Faiza Khalil、Christoph Weidmann、Michael Schröder、Marcus Rohnke、Jürgen Janek、Bernd M. Smarsly、Wolfgang Maison
DOI:10.1002/chem.201100715
日期:2011.7.25
following a biomimetic design principle, tetravalent scaffolds based on an adamantyl and trisalkylmethyl core structure have been synthesized. These scaffolds have been coupled to three catecholamines, thus resembling the characteristic tripodal recognition motif of many natural metal binders, such as musseladhesionproteins and siderophores, for example, enterobactin. Besides this tripodal recognition
Simultaneous degradation of methylene blue, eosin Y and 4-nitrophenol reduction by p(vinyl imidazole)–Co cryogel composite catalyst in aqueous environments.
Very fast catalytic reduction of 4-nitrophenol, methylene blue and eosin Y in natural waters using green chemistry: p(tannic acid)–Cu ionic liquid composites
作者:Nurettin Sahiner、Selin Sagbas、Nahit Aktas
DOI:10.1039/c5ra00126a
日期:——
borohydride (NaBH4). The prepared metal nanoparticle-containing ILCs of p(TA) microgel composites were used as catalysts in the reduction of toxic organic compounds such as 4-nitrophenol (4-NP), eosinY (EY), and methyleneblue (MB). Various parameters affecting the 4-NP and MB reduction were investigated. The activation energy, enthalpy, and entropy for the reduction of 4-NP to 4-AP catalyzed by ILC p(TA)-co
Heteroternary cucurbit[8]uril complexes as supramolecular scaffolds for self-assembled bifunctional photoredoxcatalysts
作者:Fabian Lutz、Nerea Lorenzo-Parodi、Torsten C. Schmidt、Jochen Niemeyer
DOI:10.1039/d0cc08025j
日期:——
The self-assembly of bifunctional photoredoxcatalysts is reported. A series of photosensitizers and water-reducing catalysts were functionalized with viologen- and naphthol-units, respectively. Subsequent formation of the heteroternary cucurbit[8]uril-viologen–naphthol complexes was used for the constitution of bifunctional photoredoxcatalysts for hydrogen generation.