Systematic Investigation of Silicon Substitution on Single Macromolecule Mechanics
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10443552.pdf
Description
Accepted version
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896.04 KB
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Author(s)
Wentz, Kelsie E
Yao, Yunxin
Kevlishvili, Ilia
Kouznetsova, Tatiana B
Mediavilla, Braden A
Kulik, Heather J
Craig, Stephen L
Klausen, Rebekka S
Date Issued
August 18, 2023
Journal
Macromolecules
Publisher
American Chemical Society
Citation
Systematic Investigation of Silicon Substitution on Single Macromolecule Mechanics. Kelsie E. Wentz, Yunxin Yao, Ilia Kevlishvili, Tatiana B. Kouznetsova, Braden A. Mediavilla, Heather J. Kulik, Stephen L. Craig, and Rebekka S. Klausen. Macromolecules 2023 56 (17), 6776-6782.
Version
Author's final manuscript
Abstract
Four unsaturated poly(carbooligosilane)s (P1–P4) were prepared via acyclic diene metathesis polycondensation of new oligosilane diene monomers (1–4). These novel polymers with varying main-chain Si incorporation have high trans internal olefin stereochemistry (ca. 80%) and molecular weights (9500–21,700 g mol–1). Postpolymerization epoxidation converted all alkene moieties to epoxides and rendered the polymers (P5–P8) more electrophilic, which allowed for single-molecule force spectroscopy studies via a modified atomic force microscope setup with a silicon tip and cantilever. The single-chain elasticity of the polycarbooligosilanes decreased with increasing numbers of Si–Si bonds, a finding reproduced by quantum chemical calculations.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
10.1021/acs.macromol.3c01066
