<sup>19</sup>F PARASHIFT Probes for Magnetic Resonance Detection of H<sub>2</sub>O<sub>2</sub> and Peroxidase Activity
作者:Meng Yu、Bailey S. Bouley、Da Xie、José S. Enriquez、Emily L. Que
DOI:10.1021/jacs.8b05685
日期:2018.8.22
oxidative activity associated with inflammation using 19Fmagneticresonanceimaging (MRI). These agents display a large change in 19F chemical shift upon oxidation from Co(II) to Co(III), facilitating selective visualization of both species using chemical shift selective pulse sequences. This large chemical shift change is attributed to a large magnetic anisotropy in the high spin Co(II) complexes. Importantly
Hypoxia-Responsive <sup>19</sup>F MRI Probes with Improved Redox Properties and Biocompatibility
作者:Da Xie、Seyong Kim、Vikraant Kohli、Arnab Banerjee、Meng Yu、José S. Enriquez、Jeffrey J. Luci、Emily L. Que
DOI:10.1021/acs.inorgchem.7b00500
日期:2017.6.5
F-19 magnetic resonance imaging (MRI), an emerging modality in biomedical imaging, has shown promise for in vitro and in vivo preclinical studies. Here we present a It series of fluorinated Cu(II)ATSM derivatives for potential use as F-19 magnetic resonance agents for sensing cellular hypoxia. The synthesized complexes feature a hypoxia-targeting Cu2+ coordination core, nine equivalent fluorine atoms connected via a variable-length poly(ethylene glycol) linker. Introduction of the fluorine moiety maintains the planar coordination geometry of the,Cu2+ center, while the linker length modulates the Cu2+/+ reduction potential, F-19 NMR relaxation properties, and lipophilicity. In.particular, the F-19 NMI. relaxation properties were quantitatively evaluated by the Solomon-Bloembergen model, revealing a regular pattern of relaxation enhancement tuned by the distance between Cu2+ and F atoms. Finally, the potential utility of these complexes for sensing reductive environments was demonstrated using both F-19 MR phantom imaging and F-19 NMR, including experiments in intact live cells.
FLUOROSURFACTANTS
申请人:Claus Eckhard
公开号:US20110088594A1
公开(公告)日:2011-04-21
The present invention relates to compounds of the formulae (I), (II) and (III), to the use of compounds containing at least one perfluoro-tert-butoxy group and at least one substituted or unsubstituted aromatic end group as surface-active agent, and to a process for the preparation of compounds of the formula (II).
Gegenstand der vorliegenden Erfindung sind Verbindungen der Formeln (I), (II) und (III), die Verwendung von Verbindungen enthaltend mindestens eine Perfluor-tert.-butoxy-Gruppe und mindestens eine substituierte oder unsubstituierte aromatische Endgruppe als oberflächenaktives Mittel und ein Verfahren zur Herstellung von Verbindungen der Formel (II).
[EN] FLUORINATED POLY(LACTIC-CO-GLYCOLIC ACID) POLYMERS AND CORRESPONDING NANOPARTICLES AND DRUG ENCAPSULATED NANOPARTICLES<br/>[FR] POLYMÈRES POLY(ACIDE LACTIQUE-CO-GLYCOLIQUE) FLUORÉS ET NANOPARTICULES CORRESPONDANTES ET NANOPARTICULES ENCAPSULANT UN MÉDICAMENT
申请人:SOLVAY SPECIALTY POLYMERS IT
公开号:WO2019243477A1
公开(公告)日:2019-12-26
Described herein are fluorinated poly(lactic-co-glycolic acid) polymers ("PLGA"). Also described herein are fluorinated PLGA nanoparticles, drug encapsulated fluorinated PLGA nanoparticles, and corresponding dispersions. Relative to corresponding non-fluorinated PLGA nanoparticles, the fluorinated PLGA nanoparticles have desirable 19F nuclear magnetic resonance ("NMR") activities and concomitant relaxation times for use as 19F magnetic resonance imaging ("MRI") probes. It was surprisingly found that, for some fluorinated PLGA nanoparticle embodiments, the 19FNMR activity (and therefore the 19FMRI activity) could be tuned (e.g. turned on an off) by changing the pH of the nanoparticle dispersion. It was also surprisingly discovered that the 19FNMR activity could also be tuned by adjusting the relative concentration of the polar organic solvent to water in the formation medium, as described in detail below. Because the fluorinated PLGA nanoparticles include, by definition, fluorine, dmg loading and encapsulation efficiency is also significantly increased for fluorine containing drugs, relative to corresponding non-fluorinated PLGA.