1,4-Diazobicyclo(2,2,2)octane-modified multi-ammonium derivatives as ratiometric fluorescent sensors for lipopolysaccharide
摘要:
A series of pyrene derivatives bearing multi-quaternary ammonium 1,4-diazobicyclo(2,2,2)octane groups were synthesised as ratiometric fluorescent sensors for lipopolysaccharide (LPS) in aqueous solution. Ratiometric changes in fluorescence spectra of the sensors were observed from the pyrene monomerexcimer conversion which is modulated by the supramolecular self-assembly between sensors and LPS. These sensors show high selectivity towards LPS with the detection limit down to tens of nanomolar levels. The interaction mechanism between the sensors and LPS was also discussed.
1,4-Diazobicyclo(2,2,2)octane-modified multi-ammonium derivatives as ratiometric fluorescent sensors for lipopolysaccharide
摘要:
A series of pyrene derivatives bearing multi-quaternary ammonium 1,4-diazobicyclo(2,2,2)octane groups were synthesised as ratiometric fluorescent sensors for lipopolysaccharide (LPS) in aqueous solution. Ratiometric changes in fluorescence spectra of the sensors were observed from the pyrene monomerexcimer conversion which is modulated by the supramolecular self-assembly between sensors and LPS. These sensors show high selectivity towards LPS with the detection limit down to tens of nanomolar levels. The interaction mechanism between the sensors and LPS was also discussed.
Biaryl phenoxy group IV transition metal catalysts for olefin polymerization
申请人:Dow Global Technologies LLC
公开号:US11168161B2
公开(公告)日:2021-11-09
Embodiments are directed to catalyst systems comprising at least one metal ligand complex and to processes for polyolefin polymerization incorporating the catalyst systems. The metal ligand complexes have the following structures: (I)
BIARYL PHENOXY GROUP IV TRANSITION METAL CATALYSTS FOR OLEFIN POLYERMIZATION
申请人:Dow Global Technologies LLC
公开号:US20200157254A1
公开(公告)日:2020-05-21
Embodiments are directed to catalyst systems comprising at least one metal ligand complex and to processes for polyolefin polymerization incorporating the catalyst systems. The metal ligand complexes have the following structures: (I)
[EN] BIARYL PHENOXY GROUP IV TRANSITION METAL CATALYSTS FOR OLEFIN POLYMERIZATION<br/>[FR] CATALYSEURS BIARYLPHÉNOXY À MÉTAL DE TRANSITION DU GROUPE IV POUR LA POLYMÉRISATION D'OLÉFINES
申请人:DOW GLOBAL TECHNOLOGIES LLC
公开号:WO2020131566A1
公开(公告)日:2020-06-25
Catalyst systems that include a metal-ligand complex according to formula (I):
[EN] BIARYL HYDROXYTHIOPHENE GROUP IV TRANSITION METAL POLYMERIZATION WITH CHAIN TRANSFER CAPABILITY<br/>[FR] POLYMÉRISATION DE MÉTAL DE TRANSITION DU GROUPE IV DE BIARYLE HYDROXYTHIOPHÈNE AVEC CAPACITÉ DE TRANSFERT DE CHAÎNE
申请人:DOW GLOBAL TECHNOLOGIES LLC
公开号:WO2020185494A1
公开(公告)日:2020-09-17
Embodiments of this disclosure include polymerization processes that include contacting propylene and/or one or more (C4-C12)α-olefins in a reactor including a catalyst system. The catalyst system comprises a metal-ligand complex according to formula (I).
1,4-Diazobicyclo(2,2,2)octane-modified multi-ammonium derivatives as ratiometric fluorescent sensors for lipopolysaccharide
作者:Wenwen Zhao、Jiasheng Wu、Weimin Liu、Pengfei Wang
DOI:10.1080/10610278.2012.732224
日期:2013.2
A series of pyrene derivatives bearing multi-quaternary ammonium 1,4-diazobicyclo(2,2,2)octane groups were synthesised as ratiometric fluorescent sensors for lipopolysaccharide (LPS) in aqueous solution. Ratiometric changes in fluorescence spectra of the sensors were observed from the pyrene monomerexcimer conversion which is modulated by the supramolecular self-assembly between sensors and LPS. These sensors show high selectivity towards LPS with the detection limit down to tens of nanomolar levels. The interaction mechanism between the sensors and LPS was also discussed.