63988-10-3Relevant articles and documents
Poly(3-alkyltellurophene)s are solution-processable polyheterocycles
Jahnke, Ashlee A.,Djukic, Brandon,McCormick, Theresa M.,Buchaca Domingo, Ester,Hellmann, Christoph,Lee, Yunjeong,Seferos, Dwight S.
, p. 951 - 954 (2013)
The synthesis and characterization of a series of poly(3-alkyltellurophene) s are described. Polymers are prepared by both electrochemical and Kumada catalyst transfer polymerization methods. These polymers have reasonably high molecular weights (Mn = 5.4-11.3 kDa) and can be processed in a manner analogous to that of their lighter atom analogues. All examples exhibit red-shifted optical absorption, as well as solid-state organization, as evidenced by absorption spectroscopy and atomic force microscopy. Overall, the synthesis and characterization of these materials open up a wide range of future studies involving tellurium-based polyheterocycles.
Multiple investigations of aqueous Eu(iii)-oxalate complexes: The reduction in coordination number and validation of spectral linear correlation
Li, Xiaolong,Li, Yao,Liu, Chunli,Pan, Duoqiang,Shi, Yanlin,Tan, Zhaoyi,Wang, Jingyi,Wu, Wangsuo,Xian, Dongfan,Zhou, Wanqiang
supporting information, p. 9388 - 9398 (2021/07/17)
Detailed information on the An(iii)/Ln(iii) complexation properties in solution is essential for separation chemistry and the prediction of their potential for radionuclide migration from nuclear waste repositories into natural aquifers. In the present study, to better reveal and confirm the structural information of [Eu(Ox)x(H2O)h?2x]3?2x(h= 8, 9;x= 0-3) aqueous species, especially the variable coordination number (CN), and explore the validity of the spectral linear correlation between the luminescence lifetime and the residual hydration number in the first coordination sphere of Eu(iii) compounds in solution, a comparison between the spectral results and the theoretical calculations in a wide parametric space in terms of the pH value and oxalate concentration was carried out by combining time-resolved luminescence spectroscopy (TRLS) with speciation modelling and density functional theory (DFT) calculations. We have found direct and clear evidence for the 9-fold to 8-fold coordination number reduction of Eu(iii) atoms upon coordination with more than one oxalate in an aqueous medium, and as well systematically validated the applicability of the spectral linear correlation in an aqueous system (otherwise solid state) involving multiple species with the support of relatively reliable and clear speciation modelling.
Biocatalytic cascade for the synthesis of enantiopure β-azidoalcohols and β-hydroxynitriles
Schrittwieser, Joerg H.,Lavandera, Ivan,Seisser, Birgit,Mautner, Barbara,Kroutil, Wolfgang
supporting information; experimental part, p. 2293 - 2298 (2009/08/17)
A three-step, two-enzyme, one-pot reaction sequence starting from prochiral a-chloroketones leading to enantiopure (3- azidoalcohols and (3-hydroxynitriles is described. Asymmetric bioreduction of a-chloroketones by hydrogen transfer catalysed by an alcohol dehydrogenase (ADH) established the stereogenic centre in the first step to furnish enantiopure chlorohydrin intermediates. Subsequent biocatalysed ring closure to the epoxide and nucleophilic ring opening with azide, N3-, or cyanide, CN-, both catalysed by a nonselective halohydrin dehalogenase (Hhe) proceeded with full retention of configuration to give enantiopure (-azidoalcohols and (3-hydroxynitriles, respectively. Both enantiomers of various optically pure (-azidoalcohols and (-hydroxynitriles were synthesised.
