TY - JOUR
T1 - Synthesizing a Trefoil Knotted Block Copolymer via Ring-Expansion Strategy
AU - Cao, Peng Fei
AU - Rong, Li Han
AU - Mangadlao, Joey Dacula
AU - Advincula, Rigoberto C.
PY - 2017/2/28
Y1 - 2017/2/28
N2 - A synthetic trefoil knotted poly(ε-caprolatone)-block-poly(l-lactide) (TK-PLA-b-PCL) is synthesized via a ring-expansion strategy from a trefoil knotted tin (Sn) initiator. Ring-closing reaction between the bis-copper(I) templated phenanthroline complex and dibutyldimethoxytin results in a templated trefoil knotted initiator. The bis-copper(I) templated trefoil knotted poly(l-lactide) (TK-PLA) can be synthesized by ring-opening polymerization of l-lactide monomer, and decomplexation reaction of the templated TK-PLA will result in a geniune TK-PLA without constraint from the copper template. Subsequent insertion of ε-caprolactone in the bis-copper(I) templated TK-PLA forms the templated trefoil knotted block copolymer, i.e., TK-PLA-b-PCL, and the copper-free TK-PLA-b-PCL can be obtained by decomplexation reaction. Both TK-PLA and TK-PLA-b-PCL are analyzed by the 1H NMR, FT-IR, UV-vis, DLS, and GPC.
AB - A synthetic trefoil knotted poly(ε-caprolatone)-block-poly(l-lactide) (TK-PLA-b-PCL) is synthesized via a ring-expansion strategy from a trefoil knotted tin (Sn) initiator. Ring-closing reaction between the bis-copper(I) templated phenanthroline complex and dibutyldimethoxytin results in a templated trefoil knotted initiator. The bis-copper(I) templated trefoil knotted poly(l-lactide) (TK-PLA) can be synthesized by ring-opening polymerization of l-lactide monomer, and decomplexation reaction of the templated TK-PLA will result in a geniune TK-PLA without constraint from the copper template. Subsequent insertion of ε-caprolactone in the bis-copper(I) templated TK-PLA forms the templated trefoil knotted block copolymer, i.e., TK-PLA-b-PCL, and the copper-free TK-PLA-b-PCL can be obtained by decomplexation reaction. Both TK-PLA and TK-PLA-b-PCL are analyzed by the 1H NMR, FT-IR, UV-vis, DLS, and GPC.
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U2 - 10.1021/acs.macromol.6b02029
DO - 10.1021/acs.macromol.6b02029
M3 - Article
AN - SCOPUS:85014093198
VL - 50
SP - 1473
EP - 1481
JO - Macromolecules
JF - Macromolecules
SN - 0024-9297
IS - 4
ER -