52667-89-7Relevant articles and documents
Reusable and environmentally friendly ionic trinuclear iron complex catalyst for atom transfer radical polymerization
Niibayashi, Shota,Hayakawa, Hitoshi,Jin, Ren-Hua,Nagashima, Hideo
, p. 1855 - 1857 (2007)
Ionic iron complex [(Me3tacn)2Fe2Cl 3]+[(Me3tacn)FeCl3]- (1), which is readily soluble in methanol, acted as a powerful catalyst in controlled radical polymerization of styrene and MMA, and showed promising features of removal from the resulting polymers and was reusable after recovery from the crude products. The Royal Society of Chemistry.
Paramagnetic palladacycles with PdIII centers are highly active catalysts for asymmetric aza-Claisen rearrangements
Eitel, Simon H.,Bauer, Matthias,Schweinfurth, David,Deibel, Naina,Sarkar, Biprajit,Kelm, Harald,Krueger, Hans-Joerg,Frey, Wolfgang,Peters, Rene
, p. 4683 - 4693 (2012)
A combination of spectroscopic and electrochemical methods - XANES, EXAFS, X-ray, 1H NMR, EPR, Moessbauer, and cyclic voltammetry - demonstrate that the most efficient Pd catalysts for the asymmetric rearrangement of allylic trifluoroacetimidates unexpectedly possess in the activated oxidized form a PdIII center bound to a ferrocene core which remains unchanged (FeII) during the oxidative activation. These are the first recognized PdIII complexes acting as enantioselective catalysts.
Second-Sphere Interaction Promoted Turn-On Fluorescence for Selective Sensing of Organic Amines in a TbIII-based Macrocyclic Framework
Huang, Xianqiang,Liu, Qingzhi,Liu, Shixi,Ma, Shengqian,Nafady, Ayman,Niu, Zheng,Ren, Junyu,Tsai, Chen-Yen,Ye, Yingxiang
, p. 23705 - 23712 (2021/09/22)
Guided by a second-sphere interaction strategy, we fabricated a Tb(III)-based metal—organic framework (MMCF-4) for turn-on sensing of methyl amine with ultra-low detection limit and high turn-on efficiency. MMCF-4 features lanthanide nodes shielded in a nonacoordinate geometry along with secondary coordination spheres that are densely populated with H-bond interacting sites. Nonradiative routes were inhibited by binding-induced rigidification of the ligand on the second coordination sphere, resulting in luminescence amplification. Such remote interacting mechanism involved in the turn-on sensing event was confirmed by single-crystal X-ray diffraction and molecular dynamic simulation studies. The design of both primary and secondary coordination spheres of Tb(III) enabled the first turn-on sensing of organic amines in aqueous conditions. Our work suggests a promising strategy for high-performance turn-on sensing for Ln-MOFs and luminous materials driven by other metal chromophores.
METHOD FOR PREPARING NOTA DERIVATIVE
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Paragraph 0024; 0032; 0038; 0040; 0047, (2019/09/20)
A method for preparing a NOTA derivative is revealed. The method includes a plurality of steps. First take 4-toluenesulfonyl chloride and diethylenetriamine to carry out tosylation reaction and obtain a first product. Then the first substitution reaction takes place upon addition of the first product with sodium methoxide to get the second product. Next take 4-toluenesulfonyl chloride to react with ethylene glycol for preparing a third product by tosylation reaction therebewteen. Then a coupling reaction between the third product and the second product is carried out to produce a fourth product. The second substitution reaction occurs involving the fourth product in the presence of sulfuric acid. Lastly take the reaction product and hydrochloric acid to have bonding reaction and obtain a final product. The method solves the water-absorption problem of the cyclic organic compound TACN, a NOTA derivative.