Formation of Disk- and Stacked-Disk-like Self-Assembled Morphologies from Cholesterol-Functionalized Amphiphilic Polycarbonate Diblock Copolymers
作者:Shrinivas Venkataraman、Ashlynn L. Lee、Hareem T. Maune、James L. Hedrick、Vivek M. Prabhu、Yi Yan Yang
DOI:10.1021/ma400423b
日期:2013.6.25
0]undec-7-ene (DBU) and (−)-sparteine, and kinetics of polymerization was monitored. By using mPEG-OH as the macroinitiator, well-defined amphiphilicdiblock copolymers mPEG113-b-P(MTC-Chol)n (n = 4 and 11) were synthesized. Under aqueous conditions, these block copolymers self-assembled to form unique nanostructures. Disk-like micelles and stacked-disk morphology were observed for mPEG113-b-P(MTC-Chol)4 and m
合成了胆固醇官能化的脂族环状碳酸酯单体,氨基甲酸2-(5-甲基-2-氧代-1,3-二恶烷-5-羧酰氧基)乙基氨基甲酸酯(MTC-Chol)。MTC-Chol的有机催化开环聚合反应是通过将N-(3,5-三氟甲基)苯基-N'-环己基硫脲(TU)与碱结合使用的,例如1,8-二氮杂双环[5.4.0]十一烷基- 7-烯(DBU)和(-)-天冬氨酸,监测聚合动力学。通过使用mPEG-OH作为大分子引发剂,定义明确的两亲性二嵌段共聚物mPEG 113 - b -P(MTC-Chol)n(n= 4和11)被合成。在含水条件下,这些嵌段共聚物自组装形成独特的纳米结构。通过透射电子显微镜(TEM)分别观察到mPEG 113 - b -P(MTC-Chol)4和mPEG 113 - b -P(MTC-Chol)11的盘状胶束和堆叠盘形态。小角中子散射支持盘状形态,并估计分散溶液中的嵌段共聚物胶束聚集数。含胆固醇
ANTIMICROBIAL CATIONIC POLYCARBONATES
申请人:CORPORATION INTERNATIONAL BUSINESS MACHINES
公开号:US20140301968A1
公开(公告)日:2014-10-09
Antimicrobial cationic polymers having one or two cationic polycarbonate chains were prepared by organocatalyzed ring opening polymerization. One antimicrobial cationic polymer has a polymer chain consisting essentially of cationic carbonate repeat units linked to one or two end groups. The end groups can comprise a covalently bound form of biologically active compound such as cholesterol. Other antimicrobial cationic polymers have a random copolycarbonate chain comprising a minor mole fraction of hydrophobic repeat units bearing a covalently bound form of a vitamin E and/or vitamin D2. The cationic polymers exhibit high activity and selectivity against Gram-negative and Gram-positive microbes and fungi.