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Revealing the physical properties of chlorine-substituted poly(acetylene)

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Title
Revealing the physical properties of chlorine-substituted poly(acetylene)
Author(s)
Youngsang Cho; Jinwon Seo; Sherilyn J. Lu; Songsu Kang; Yeram Kim; Christopher W. Bielawski
Publication Date
2023-08
Journal
POLYMER CHEMISTRY, v.14, no.31, pp.3580 - 3586
Publisher
ROYAL SOC CHEMISTRY
Abstract
cis-3,4-Dichlorocyclobutene was synthesized and polymerized using the Grubbs 3(rd) generation catalyst. The corresponding ring-opening metathesis polymerization (ROMP) reaction proceeded in a controlled manner and provided access to narrowly dispersed polymers with tunable molecular weights. Treating poly(3,4-dichlorocyclobutene) with an organic base (e.g., triethylamine) prompted an elimination reaction and afforded poly(chloroethyne-ran-ethyne) in quantitative yield. The electrical conductivity of a film of the chlorine-substituted poly(acetylene) was measured and found to be comparable to values reported for organic semiconductors (10(-5) & omega;(-1) cm(-1)). Higher conductivity (10(-2) & omega;(-1) cm(-1)) values were achieved via p- or n-type doping. A block copolymer that featured a poly(norbornene) segment connected to a chlorine-substituted poly(acetylene) as well as a random copolymer derived from cis-3,4-dichlorocyclobutene and cis-2-ethylhexyl 4-chlorocyclobut-2-ene-1-carboxylate were also synthesized and studied. The copolymers displayed good solubility in organic solvents and valuable electronic properties. The polymers were characterized using various spectroscopic (NMR, FT-IR, UV-vis, XPS, and Raman) and thermal techniques as well as size exclusion chromatography (SEC).
URI
https://pr.ibs.re.kr/handle/8788114/14269
DOI
10.1039/d3py00416c
ISSN
1759-9954
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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