110429-45-3Relevant articles and documents
Ethylene glycol monolayer protected nanoparticles for eliminating nonspecific binding with biological molecules
Zheng, Ming,Davidson, Fredric,Huang, Xueying
, p. 7790 - 7791 (2003)
The usefulness of the hybrid materials of nanoparticles and biological molecules in many occasions depends on how well one can achieve a rational design based on specific binding and programmable assembly. Nonspecific binding between nanoparticles and biomolecules is one of the major barriers for achieving its utilities in a biological system. In this paper, we demonstrate a new approach to eliminate nonspecific interactions between nanoparticles and proteins by synthesizing ethylene glycol protected gold nanoparticles. We discovered that with the water content optimized in the range of 9-18% in the reaction mixture, di-, tri-, and tetra(ethylene glycol) protected gold nanoparticles Au-S-EGn (n = 2, 3, and 4) could be directly synthesized. These gold nanoparticles that are bonded with a uniform monolayer with defined length varying from 0.8 to 1.6 nm (from molecular modeling) have great stability in aqueous solutions with a high concentration of electrolyte and organic solutions. Using ion-exchange chromatography and gel electrophoresis, we demonstrated that these Au-S-EGn (n = 2, 3, or 4) nanoparticles have complete resistance to protein nonspecific interactions. These types of nanoparticles provide a fundamental starting material for designing hybrid materials composed of metallic nanoparticles and biomolecules. Copyright
Glycol-functionalized ionic liquids for high-temperature enzymatic ring-opening polymerization
Zhao, Hua,Afriyie, Lennox O.,Larm, Nathaniel E.,Baker, Gary A.
, p. 36025 - 36033 (2018)
Enzymatic ring-opening polymerization (ROP) is a benign method for preparing polyesters, such as polylactides and other polylactones. These reactions are typically carried out at relatively high temperatures (60-130 °C), however, there is a deficiency of enzyme-compatible solvents for such thermally-demanding biocatalytic processes. In this study, we have prepared a series of short-chained glycol-grafted ionic liquids (ILs) based on a phosphonium, imidazolium, pyridinium, ammonium, or piperidinium cationic headgroup. Most of these glycol-grafted ILs exhibit relatively low dynamic viscosities (33-123 mPa s at 30 °C), coupled with excellent short-term thermal stabilities with decomposition temperatures (Tdcp) in the 318-403 °C range. Significantly, the long-term thermal stability under conditions matching those for enzymatic ROP synthesis (130 °C for 7 days) is excellent for several of these task-specific ILs. Using Novozym 435-catalyzed ROP, these ILs are demonstrated to be viable solvents for the enzymatic production of reasonable yields (30-48%) of high molecular mass (Mw ～20 kDa) poly(l-lactide) and poly(?-caprolactone) compared to solventless conditions (12-14 kDa).
STABILIZED POLYMERIC NANOCAPSULES, DISPERSIONS COMPRISING THE NANOCAPSULES, AND METHODS FOR THE TREATMENT OF BACTERIAL BIOFILMS
-
Paragraph 0073, (2017/03/21)
A nanocapsule includes a liquid hydrophobic core including an essential oil, and a shell encapsulating the core. The shell includes a copolymer having repeating units of Formula (I) and (II) wherein X, L1, R1, R2, y, and p are as described herein. A dispersion is also disclosed, wherein the dispersion includes a plurality of nanocapsules. The nanocapsules described herein are particularly useful for the treatment of bacterial biofilms.
Multimodal switching of conformation and solubility in homocysteine derived polypeptides
Kramer, Jessica R.,Deming, Timothy J.
supporting information, p. 5547 - 5550 (2014/05/06)
We report the design and synthesis of poly(S-alkyl-l-homocysteine)s, which were found to be a new class of readily prepared, multiresponsive polymers that possess the unprecedented ability to respond in different ways to different stimuli, either through
