Application of cyclodextrins (CDS) for remediation of perfluoroalkyl substances (PFASS)
申请人:O'Shea Kevin E.
公开号:US11149135B2
公开(公告)日:2021-10-19
A system for remediation of perfluoroalkyl substances (PFASs) has a multiplicity of β-cyclodextrins (β-CDs) and/or modified β-CDs combined with a vehicle additive, and a delivery device. Modified β-CDs can contain a single amine functionality at a single primary carbon or single secondary carbon of the β-CD. The vehicle additive can be powdered activated carbon (PAC). The delivery device is a column, a pouch, a packet, or a sheet that can permit the contacting of a fluid environment with the β-CDs and vehicle additive. The system of remediation can be used for a fluid environment or for biological organisms. CD-based fluorescent sensors can detect PFASs in the environment.
Lithography composition, a method for forming resist patterns and a method for making semiconductor devices
申请人:Ridgefield Acquisition
公开号:US11156920B2
公开(公告)日:2021-10-26
The present invention relates to a new lithography composition, the forming of resist patterns using the lithography composition, and a semiconductor device manufacturing method using the lithography composition in a photolithography method.
Fullerene compound, lubricant for magnetic recording medium, and magnetic recording medium
申请人:SHOWA DENKO K.K.
公开号:US11261395B2
公开(公告)日:2022-03-01
The invention provides a fullerene compound; a lubricant that is for a magnetic recording medium and that contains the fullerene compound; and a magnetic recording medium. The fullerene compound is an ionic liquid that is represented by general formula (1) and is formed from a Bronsted acid (Hn1X) and a Bronsted base ([R2R3)N—]m1—R1); wherein one of the Brønsted acid and the Broønsted base contains a group having a fullerene; and the other contains a perfluoroalkyl chain.
Composition and method for capture and degradation of PFAS
申请人:Battelle Memorial Institute
公开号:US11518689B2
公开(公告)日:2022-12-06
Materials for binding per- and polyfluoroalkyl substances (PFAS) are disclosed. A fluidic device comprising the materials for detection and quantification of PFAS in a sample is disclosed. The fluidic device may be configured for multiplexed analyses. Also disclosed are methods for sorbing and remediating PFAS in a sample. The sample may be groundwater containing, or suspected of containing, one or more PFAS.
Second generation Grubbs catalyst was modified stepwise with perfluoroalkylated isopropoxystyrene and two perfluoroalkanoate or perfluoropolyoxaalkanoate ligands to afford heavy fluorous phosphine-free ruthenium complexes, which displayed high activity in model ring-closing metathesis reactions. Surprisingly, substitution with linear perfluoropolyether chains led to the complexes of higher activity and fluorophilicity compared to perfluoroalkyl chains, while the use of branched perfluoropolyether ponytails resulted in significantly inferior activity probably due to increased steric hindrance around the active ruthenium centre. Similar reactivity pattern with slightly lower activity was observed for the second generation Hoveyda-Grubbs catalysts bearing perfluoroalkanoate or perfluoropolyoxaalkanoate groups and non-fluorinated isopropoxybenzylidene ligand. Depending on the reaction system, unactivated precatalysts can be recycled by heavy fluorous extraction with perfluoro(methylcyclohexane). (C) 2014 Elsevier B.V. All rights reserved.