Circular dichroism, surface-enhanced Raman scattering, and spectroscopic ellipsometry studies of chiral polyfluorene-phenylene films

Geon Joon Lee; Eun Ha Choi; Won Kyu Ham; Chang Kwon Hwangbo; Min Ju Cho; Dong Hoon Choi

doi:10.1364/OME.6.000767

Circular dichroism, surface-enhanced Raman scattering, and spectroscopic ellipsometry studies of chiral polyfluorene-phenylene films

Geon Joon Lee, Eun Ha Choi, Won Kyu Ham, Chang Kwon Hwangbo, Min Ju Cho, Dong Hoon Choi

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

To understand the chiroptical responses of polyfluorene- phenylene (PFP) films, circular dichroism (CD), surface-enhanced Raman scattering (SERS), attenuated total reflection (ATR), and spectroscopic ellipsometry studies were performed. The pristine PFP films exhibited significant CD at room temperature, and the chirality increased by thermal annealing at 120 °C (above the glass transition temperature). SERS and ATR spectra indicated that the chirality enhancement was due to the rearrangement of the polymer backbones on the glass substrate by thermal annealing and/or self-organization. In addition, comparison of PFP and polyfluorene polymers indicated that molecular structure of polymer backbone plays an important role in the chiroptical responses of the chiral polymers.

Original language	English
Pages (from-to)	767-781
Number of pages	15
Journal	Optical Materials Express
Volume	6
Issue number	3
DOIs	https://doi.org/10.1364/OME.6.000767
Publication status	Published - 2016 Mar 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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@article{db902c0105d44b378647ee9abd62306e,

title = "Circular dichroism, surface-enhanced Raman scattering, and spectroscopic ellipsometry studies of chiral polyfluorene-phenylene films",

abstract = "To understand the chiroptical responses of polyfluorene- phenylene (PFP) films, circular dichroism (CD), surface-enhanced Raman scattering (SERS), attenuated total reflection (ATR), and spectroscopic ellipsometry studies were performed. The pristine PFP films exhibited significant CD at room temperature, and the chirality increased by thermal annealing at 120 °C (above the glass transition temperature). SERS and ATR spectra indicated that the chirality enhancement was due to the rearrangement of the polymer backbones on the glass substrate by thermal annealing and/or self-organization. In addition, comparison of PFP and polyfluorene polymers indicated that molecular structure of polymer backbone plays an important role in the chiroptical responses of the chiral polymers.",

author = "Lee, {Geon Joon} and Choi, {Eun Ha} and Ham, {Won Kyu} and Hwangbo, {Chang Kwon} and Cho, {Min Ju} and Choi, {Dong Hoon}",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Korean government [Grant numbers 2015R1D1A1A01057501 (Lee), NRF-2010-0027963 (PBRC)], and in part by Kwangwoon University in 2015. This research was supported by the National Research Foundation of Korea (NRF2012R1A2A1A01008797). Publisher Copyright: {\textcopyright} 2016 Optical Society of America.",

year = "2016",

month = mar,

day = "1",

doi = "10.1364/OME.6.000767",

language = "English",

volume = "6",

pages = "767--781",

journal = "Optical Materials Express",

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T1 - Circular dichroism, surface-enhanced Raman scattering, and spectroscopic ellipsometry studies of chiral polyfluorene-phenylene films

AU - Lee, Geon Joon

AU - Choi, Eun Ha

AU - Ham, Won Kyu

AU - Hwangbo, Chang Kwon

AU - Cho, Min Ju

AU - Choi, Dong Hoon

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Korean government [Grant numbers 2015R1D1A1A01057501 (Lee), NRF-2010-0027963 (PBRC)], and in part by Kwangwoon University in 2015. This research was supported by the National Research Foundation of Korea (NRF2012R1A2A1A01008797). Publisher Copyright: © 2016 Optical Society of America.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - To understand the chiroptical responses of polyfluorene- phenylene (PFP) films, circular dichroism (CD), surface-enhanced Raman scattering (SERS), attenuated total reflection (ATR), and spectroscopic ellipsometry studies were performed. The pristine PFP films exhibited significant CD at room temperature, and the chirality increased by thermal annealing at 120 °C (above the glass transition temperature). SERS and ATR spectra indicated that the chirality enhancement was due to the rearrangement of the polymer backbones on the glass substrate by thermal annealing and/or self-organization. In addition, comparison of PFP and polyfluorene polymers indicated that molecular structure of polymer backbone plays an important role in the chiroptical responses of the chiral polymers.

AB - To understand the chiroptical responses of polyfluorene- phenylene (PFP) films, circular dichroism (CD), surface-enhanced Raman scattering (SERS), attenuated total reflection (ATR), and spectroscopic ellipsometry studies were performed. The pristine PFP films exhibited significant CD at room temperature, and the chirality increased by thermal annealing at 120 °C (above the glass transition temperature). SERS and ATR spectra indicated that the chirality enhancement was due to the rearrangement of the polymer backbones on the glass substrate by thermal annealing and/or self-organization. In addition, comparison of PFP and polyfluorene polymers indicated that molecular structure of polymer backbone plays an important role in the chiroptical responses of the chiral polymers.

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DO - 10.1364/OME.6.000767

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VL - 6

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EP - 781

JO - Optical Materials Express

JF - Optical Materials Express

IS - 3

ER -

Circular dichroism, surface-enhanced Raman scattering, and spectroscopic ellipsometry studies of chiral polyfluorene-phenylene films

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