Structure–LCST relationships for end-functionalized water-soluble polymers: an “accelerated” approach to phase behaviour studies
作者:Satyasankar Jana、Steven P. Rannard、Andrew I. Cooper
DOI:10.1039/b702067h
日期:——
A novel âhigh throughputâ technique for LCST measurement was developed which is able to identify the effect of subtle changes in end group composition on the aqueous phase behaviour of water-soluble poly(2-(dimethylamino)ethyl methacrylate).
Facile synthesis of gemini surface-active ATRP initiator and its use in soap-free AGET ATRP mini-emulsion polymerisation
作者:Chuan Cheng、Quan Fu、Xiong Bai、Shao Liu、Liang Shen、Wu Fan、Hong Li
DOI:10.2478/s11696-012-0271-y
日期:2013.1.1
both as an emulsifier and an atom transfer radical polymerisation (ATRP) initiator in mini-emulsion polymerisation of methyl methacrylate (MMA), in which no other emulsifier was required. 1-(Dimethylamino)dodecane (N,N-dimethyldodecylamine, DMDA) was found to be a good ligand in the activator generated by electron transfer (AGET) ATRP reaction. Kinetic studies indicated that the polymerisation featured
Compositions are described comprising a of a block copolymer having an overall ionic charge and in which one of the blocks has pendant zwitterionic groups and a biologically active compound having a charge opposite that of the polymer. The polymer is preferably a linear diablock copolymer, preferably having a low polydispersity, such as a (tertiary amine group containing monomer) block-(zwitterionic monomer) copolymer. Suitable cationic monomers are dialkyl aminoalkyl(alk)acrylates and -acrylamides and suitable zwitterionic monomers are phosphorylcholine group containing acrylate monomers such as 2-methacyloyloxyetyl-2
1
-trimethyl ammonium ethyl phosphate liner salt. The biologically active compound is generally polyionic and is for instance a nucleic acid, such as DNA, especially plasmid DNA.
The present invention relates to a method of monitoring live cells, comprising the steps of:
(i) contacting the cells with self-assembled constructs associated with an imaging agent;
(ii) incubating the cells;
(iii) imaging the live cells;
wherein in step (i), at least some of the constructs are taken up into the cells;
and wherein the constructs comprise an amphiphilic block copolymer having a hydrophilic and hydrophobic block.
本发明涉及一种监测活细胞的方法,包括以下步骤:
(i) 将细胞与与成像剂相关的自组装构建体接触;
(ii) 培养细胞
(iii) 对活细胞成像;
其中,在步骤(i)中,至少部分构建体被带入细胞;
其中,构建体包括具有亲水和疏水嵌段的两亲嵌段共聚物。
Zwitterionic polymers
申请人:——
公开号:US20040063881A1
公开(公告)日:2004-04-01
Polymers may be made from zwitterionic monomers having controlled architectures and molecular weights, using living polymerisations such as group or atom transfer radical polymerisation. For instance polymers may be formed by atom transfer radical polymerisation using a copper chloride catalyst, a ligand which is water soluble, and a water soluble tertiary alkyl halide initiator to form homopolymers having controlled polydispersities of less than 1.5 and block copolymers with other hydrophilic or hydrophobic monomers. One suitable zwitterionic monomer is 2-methacryloyloxy-2′-trimethylammoniumethyl phosphate inner salt. The block copolymers may spontaneously form micelles, believed to have zwitterionic, for instance phosphorylcholine, groups at the external surface, which may be useful as drug delivery systems with improved biocompatibility.