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Title: Synthesizing a Trefoil Knotted Block Copolymer via Ring-Expansion Strategy

Abstract

We synthesized a synthetic trefoil knotted poly(e-caprolatone) block-poly(L-lactide) (TK-PLA-b-PCL) via a ring expansion strategy from a trefoil knotted tin (Sn) initiator. Ring closing reaction between the bis-copper(I) templated phenanthro line complex and dibutyldimethoxytin results in a templated trefoil knotted initiator. Furthermore, 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 e 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. Finally, both TK-PLA and TK-PLA-b-PCL are analyzed by the 1 H NMR, FT-IR, UV-vis, DLS, and GPC.

Authors:
 [1];  [2];  [2];  [1]
  1. ORNL
  2. Case Western Reserve University
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1354670
Grant/Contract Number:
AC05-00OR22725; NSF-1608457; NSF-1333651
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Macromolecules
Additional Journal Information:
Journal Volume: 50; Journal Issue: 4; Journal ID: ISSN 0024-9297
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Cao, Pengfei, Rong, Li-Han, Mangadlao, Joey, and Advincula, Rigoberto C. Synthesizing a Trefoil Knotted Block Copolymer via Ring-Expansion Strategy. United States: N. p., 2017. Web. doi:10.1021/acs.macromol.6b02029.
Cao, Pengfei, Rong, Li-Han, Mangadlao, Joey, & Advincula, Rigoberto C. Synthesizing a Trefoil Knotted Block Copolymer via Ring-Expansion Strategy. United States. doi:10.1021/acs.macromol.6b02029.
Cao, Pengfei, Rong, Li-Han, Mangadlao, Joey, and Advincula, Rigoberto C. Tue . "Synthesizing a Trefoil Knotted Block Copolymer via Ring-Expansion Strategy". United States. doi:10.1021/acs.macromol.6b02029. https://www.osti.gov/servlets/purl/1354670.
@article{osti_1354670,
title = {Synthesizing a Trefoil Knotted Block Copolymer via Ring-Expansion Strategy},
author = {Cao, Pengfei and Rong, Li-Han and Mangadlao, Joey and Advincula, Rigoberto C},
abstractNote = {We synthesized a synthetic trefoil knotted poly(e-caprolatone) block-poly(L-lactide) (TK-PLA-b-PCL) via a ring expansion strategy from a trefoil knotted tin (Sn) initiator. Ring closing reaction between the bis-copper(I) templated phenanthro line complex and dibutyldimethoxytin results in a templated trefoil knotted initiator. Furthermore, 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 e 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. Finally, both TK-PLA and TK-PLA-b-PCL are analyzed by the 1 H NMR, FT-IR, UV-vis, DLS, and GPC.},
doi = {10.1021/acs.macromol.6b02029},
journal = {Macromolecules},
number = 4,
volume = 50,
place = {United States},
year = {Tue Feb 07 00:00:00 EST 2017},
month = {Tue Feb 07 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
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