A Continuous Visible Light Spectrophotometric Approach To Accurately Determine the Reactivity of Radical-Trapping Antioxidants
作者:Evan A. Haidasz、Antonius T. M. Van Kessel、Derek A. Pratt
DOI:10.1021/acs.joc.5b02183
日期:2016.2.5
employ peroxyl radicals as the oxidant and do not account for both the kinetics and stoichiometry of the radical-trapping reaction(s). In an effort to make inhibited autoxidations as simple as the most popular “antioxidant assays”, we have developed a spectrophotometric approach for monitoring reaction progress in inhibited autoxidations. The approach employs easily prepared 1-phenylbutadiene-conjugated
Lanthanide Amido Complexes Incorporating Amino-Coordinate-Lithium Bridged Bis(indolyl) Ligands: Synthesis, Characterization, and Catalysis for Hydrophosphonylation of Aldehydes and Aldimines
作者:Xiancui Zhu、Shaowu Wang、Shuangliu Zhou、Yun Wei、Lijun Zhang、Fenhua Wang、Zhijun Feng、Liping Guo、Xiaolong Mu
DOI:10.1021/ic300137r
日期:2012.7.2
Two series of new lanthanide amido complexes supported by bis(indolyl) ligands with amino-coordinate-lithium as a bridge were synthesized and characterized. The interactions of [(Me3Si)2N]3LnIII(μ-Cl)Li(THF)3 with 2 equiv of 3-(CyNHCH2)C8H5NH in toluene produced the amino-coordinate-lithium bridgedbis(indolyl) lanthanide amides [μ-[η1:η1:η1:η1-3-(CyNHCH2)Ind]2Li}Ln[N(SiMe3)2]2] (Cy = cyclohexyl,
A highly efficient sensor molecule emitting in the near infrared (NIR): 3,5-distyryl-8-(p-dimethylaminophenyl)difluoroboradiaza-s-indacene
作者:Knut Rurack、Matthias Kollmannsberger、Jörg Daub
DOI:10.1039/b007379m
日期:——
The spectroscopic properties and the photophysical behaviour of difluoroboradiaza-s-indacene 1, especially designed
for the near infrared (NIR) spectral region and equipped with a p-dimethylaminophenyl group at the meso-position, were studied by steady-state and time-resolved optical spectroscopy. Solvent-dependent measurements
revealed that for 1, excited state deactivation is governed by population of a non-emissive charge transfer excited state (1CT) as the solvent polarity increases, whereas reference compound 2 shows strong fluorescence
from a locally excited state (1LE) in all the solvents employed. Accordingly, protonation of 1 completely suppresses the quenching excited state charge transfer process and leads to strong enhancement of fluorescence in the
NIR, distinguishing 1 as a very sensitive fluorescent sensor molecule for pH or solvent acidity in this favourable wavelength region.
A pH‐Sensitive Double Chromophore Fluorescent Dye for Live‐Tracking of Lipophagy
作者:Pascal M. Engelhardt、Matteo Veronese、Alpay A. Eryiğit、Anushka Das、Alexander T. Kaczmarek、Elena I. Rugarli、Hans‐Günther Schmalz
DOI:10.1002/chem.202400808
日期:——
and quantify lipophagy in an easily applicable, non-toxic and protein label-free approach by means of fluorescence microscopy, a unique dye called Lipo-Fluddy-1 was developed. This synthetic dye is characterized by a high lipophilicity and contains two chromophores, one of which only fluoresces at low pH. Its usefulness was demonstrated by the flow cytometry investigation of lipophagy in several cell
Ruthenium/dendrimer complex immobilized on silica‐functionalized magnetite nanoparticles catalyzed oxidation of stilbenes to benzil derivatives at room temperature
A new ruthenium/dendrimer complex stabilized on the surface of silica‐functionalized nano‐magnetite was fabricated and well characterized. The nano‐catalyst showed good activity in the synthesis of benzil derivatives via the oxidation of stilbenes with high turnover frequency (TOF) at roomtemperature. Moreover, the catalyst could also be reused up to fifteen times without any loss of its activity