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Shin, Tae Joo
Synchrotron Radiation Research Lab.
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Selective CO2 adsorption and bathochromic shift in a phosphocholine-based lipid and conjugated polymer assembly

Author(s)
Noh, JuranKoo, Dong GeonHyun, ChoheeLee, DabinJang, SeohyeonKim, JihoJeon, YejeeMoon, Su-YoungChae, BoknamNam, InhoShin, Tae JooPark, Juhyun
Issued Date
2022-03
DOI
10.1039/d2ra00453d
URI
https://scholarworks.unist.ac.kr/handle/201301/58447
Fulltext
https://pubs.rsc.org/en/content/articlelanding/2022/RA/D2RA00453D
Citation
RSC ADVANCES, v.12, no.14, pp.8385 - 8393
Abstract
We assemble a film of a phosphocholine-based lipid and a crystalline conjugated polymer using hydrophobic interactions between the alkyl tails of the lipid and alkyl side chains of the polymer, and demonstrated its selective gas adsorption properties and the polymer's improved light absorption properties. We show that a strong attractive interaction between the polar lipid heads and CO2 was responsible for 6 times more CO2 being adsorbed onto the assembly than N-2, and that with repeated CO2 adsorption and vacuuming procedures, the assembly structures of the lipid-polymer assembly were irreversibly changed, as demonstrated by in situ grazing-incidence X-ray diffraction during the gas adsorption and desorption. Despite the disruption of the lipid structure caused by adsorbed polar gas molecules on polar head groups, gas adsorption could promote orderly alkyl chain packing by inducing compressive strain, resulting in enhanced electron delocalization of conjugated backbones and bathochromic light absorption. The findings suggest that merging the structures of the crystalline functional polymer and lipid bilayer is a viable option for solar energy-converting systems that use conjugated polymers as a light harvester and the polar heads as CO2-capturing sites.
Publisher
ROYAL SOC CHEMISTRY
ISSN
2046-2069
Keyword
ACIDAIRTHIN-FILMSCAPTURENANOPARTICLESFRAMEWORKSBILAYER

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