ChemInform Abstract: Bis-ureidodeazapterin (Bis-DeAP) as a General Route to Supramolecular Star Polymers

Autor:	Steven C. Zimmerman, Eric M. Todd
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Chemistry Dispersity technology industry and agriculture Supramolecular chemistry macromolecular substances General Medicine Polymer Polyethylene glycol Toluene chemistry.chemical_compound Polymerization Bromide Polymer chemistry Copolymer
Zdroj:	ChemInform. 39
ISSN:	1522-2667 0931-7597
DOI:	10.1002/chin.200846227
Popis:	Supramolecular recognition unit Bis-DeAP, 1, containing two high affinity hydrogen-bonding acceptor–acceptor–donor–donor (AADD) arrays was designed to self-assemble into cyclic assemblies. It was prepared through a highly scalable synthesis and was further functionalized with 2-bromo-2-methylpropanoyl bromide and used to initiate the polymerization of methylmethacrylate (MMA). Bis-DeAP–PMMA polymers quantitatively self-assembled into star polymers in toluene. In DMF Bis-DeAP–PMMA forms a mixture of star polymers and unassembled polymers. Bis-DeAP was also functionalized with polyethylene glycol (PEG) polymers. The Bis-DeAP–PEG polymers formed star polymers in DMF; however, higher molecular weight polymeric assembles that varied with concentration were observed in water. Mixing studies in toluene indicated that the self-assembled star polymers are kinetically stable and resist mixing even at elevated temperatures. In DMF, kinetically controlled structures are initially observed, however, mixing occurs at a faster rate and assembled star polymers show a decrease in polydispersity index (PDI) over time. In addition, Bis-DeAP functionalized PS and PMMA were mixed in DMF to generate a star copolymer through self-assembly.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d58d3dfd55f4c3ee0479fa9dd75dec36 https://doi.org/10.1002/chin.200846227 Zobrazit plný text záznamu Plný text