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Dinuclear enantiopure Ln complexes with (-) and (-) 2-phenylbutyrate ligands. Luminescence, CPL and magnetic properties.
Dalton Trans
August 2024
Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
The reaction of Ln(NO)·6HO (Ln = Nd, Sm, Eu, Tb, Dy, Tm and Yb) with the respective enantiopure ()-(-)-2-phenylbutyric or ()-(+)-2-phenylbutyric acid (/-2-HPhBut) and 4,7-diphenyl-1,10-phenanthroline (Bphen) allows the isolation of chiral dinuclear compounds of the formula [Ln(μ-/-2-PhBut)(/-2PhBut)(Bphen)] where Ln = Nd (R/S-Nd-a), Sm (R/S-Sm-a), Eu (R/S-Eu-a), Tb (R/S-Tb-a and R/S-Tb-b), Dy (R/S-Dy-a and R/S-Dy-b), Tm (R/S-Tm-b) and Yb (R/S-Yb-b). Single crystal X-ray diffraction was performed for compounds S-Eu-a and S-Tm-b. Powder crystal X-ray diffraction was performed for all complexes.
View Article and Find Full Text PDFDegree and distribution of substitution of hydroxypropyl-β-cyclodextrin in enantioselective liquid-liquid extraction and countercurrent chromatographic enantioseparation.
J Chromatogr A
January 2023
College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310032, China. Electronic address:
Nine types of hydroxypropyl-β-cyclodextrin (HP-β-CD) with different degrees and distributions of substitution were synthesised, and nine racemates were selected to investigate the effect of different degrees and distributions of substitution of HP-β-CD on the enantioseparation factor. H NMR and GC/MS were used to characterise the synthesised HP-β-CD. The degree and distribution of substitution had a significant influence on enantioselective liquid-liquid extraction and enantioseparation by countercurrent chromatography.
View Article and Find Full Text PDFProduct Distributions of Cytochrome P450 OleT with Phenyl-Substituted Fatty Acids: A Computational Study.
Int J Mol Sci
July 2021
Manchester Institute of Biotechnology, The University of Manchester, Manchester M1 7DN, UK.
There are two types of cytochrome P450 enzymes in nature, namely, the monooxygenases and the peroxygenases. Both enzyme classes participate in substrate biodegradation or biosynthesis reactions in nature, but the P450 monooxygenases use dioxygen, while the peroxygenases take HO in their catalytic cycle instead. By contrast to the P450 monooxygenases, the P450 peroxygenases do not require an external redox partner to deliver electrons during the catalytic cycle, and also no external proton source is needed.
View Article and Find Full Text PDFRumen microbiome structure and metabolites activity in dairy cows with clinical and subclinical mastitis.
J Anim Sci Biotechnol
February 2021
State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
Background: Due to the high prevalence and complex etiology, bovine mastitis (BM) is one of the most important diseases to compromise dairy cow health and milk quality. The shift in milk compositions has been widely investigated during mastitis, but recent studies suggested that gastrointestinal microorganism also has a crucial effect on the inflammation of other peripheral tissues and organs, including the mammary gland. However, research focused on the variation of rumen inner-environment during mastitis is still limited.
View Article and Find Full Text PDFEvaluation of superficially porous particle based zwitterionic chiral ion exchangers against fully porous particle benchmarks for enantioselective ultra-high performance liquid chromatography.
J Chromatogr A
October 2019
Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, University of Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany. Electronic address:
Zwitterionic chiral ion-exchange selectors (ZWIX) obtained by conjugation of quinine and 2-aminocyclohexanesulfonic acid via a carbamate bond were immobilized on three different silica particle types, viz. 120 Å 3 μm fully porous particles (FPP), 200 Å 3 μm FPP and 160 Å 2.7 μm superficially porous particles (SPP).
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