2408-88-0Relevant articles and documents
Fluorescence enhancement of rare earth Tb(III) by Tm(III) in benzyl benzoylmethyl sulphoxide complexes
Li, Wen-Xian,Chai, Wen-Juan,Liu, Yu,Li, Ying-Jie,Ren, Tie,Zhang, Jing,Ao, Bo-Yang
, p. 431 - 436,6 (2012)
A series of rare earth complexes [(TbxTmy)L 5(ClO4)2](ClO4) A·3H2O (x:y = 1.000:0.000, 0.999:0.001, 0.995:0.005, 0.990:0.010, 0.950:0.050, 0.900:0.100, 0.800:0.200, 0.700:0.300; L = C 6H5CH2SOCH2COC6H 5) (Tb(III) luminescence ion; Tm(III) doped inert ion) were synthesized and characterized by elemental analysis, infrared spectra (IR) and 1H-NMR. The photophysical properties of these complexes were studied in detail using ultraviolet absorption spectra, fluorescent spectra and lifetimes. The fluorescence spectra of complexes indicated that the fluorescence emission intensity was significantly enhanced by Tm(III). The complexes showed the best luminescence properties when the mole ratio Tb(III):Tm(III) was 0.990:0.010. The fluorescence intensity could be increased to 390%. Additionally, phosphorescence spectra and the luminescence mechanisms are discussed. Copyright
Continuous Flow Synthesis of 2H-Thiopyrans via thia-Diels–Alder Reactions of Photochemically Generated Thioaldehydes
Sachse, Florian,Gebauer, Konrad,Schneider, Christoph
supporting information, p. 64 - 71 (2020/11/30)
Herein, we report a novel protocol for the photochemical generation of thioaldehydes in a continuous flow process which were in situ reacted with electron rich 1,3-butadienes in thia-Diels–Alder reactions. A broad range of 3,6-dihydro-2H-thiopyrans were formed as products in much higher yields and productivities as compared to classical batch processes. Moreover, greatly reduced reaction times and a facile large-scale preparation of products were achieved by fully exploiting the advantages of continuous flow technology.
Thiol-free chemoenzymatic synthesis of β-ketosulfides
Heredia, Adrián A.,López-Vidal, Martín G.,Kurina-Sanz, Marcela,Bisogno, Fabricio R.,Pe?é?ory, Alicia B.
, p. 378 - 387 (2019/02/20)
A preparation of β-ketosulfides avoiding the use of thiols is described. The combination of a multicomponent reaction and a lipase-catalysed hydrolysis has been developed in order to obtain high chemical diversity employing a single sulfur donor. This methodology for the selective synthesis of a set of β-ketosulfides is performed under mild conditions and can be set up in one-pot two-step and on a gram-scale.
