Direct synthetic route for water-dispersible polythiophene nanoparticles via surfactant-free oxidative polymerization

Hyun Woog Ryu; Yong Seok Kim; Jung Hyun Kim; In Woo Cheong

doi:10.1016/j.polymer.2013.12.056

Direct synthetic route for water-dispersible polythiophene nanoparticles via surfactant-free oxidative polymerization

Hyun Woog Ryu, Yong Seok Kim, Jung Hyun Kim, In Woo Cheong

Department of Chemical and Biomolecular Engineering

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

21 Citations (Scopus)

Abstract

Water-dispersible poly(thiophene-co-3-thiopheneacetic acid) (PThTA) nanoparticles were successfully prepared by Fe³⁺-catalyzed oxidative polymerization in the absence of a surfactant. This facile method adopted the recyclable FeCl₃/H₂O₂ initiator couple to yield a high conversion of approximately 97%, and the sodium salt of 3-thiopheneacetic acid (TA) was used for the colloidal stability of the PThTA nanoparticles. The particle formation and growth of PThTA were examined with photoluminescence (PL) spectroscopy and time-evolution variation of the particle number in the early period of polymerization. The final average particle size of PThTA was 320 nm, measured by dynamic light scattering (DLS). The number-average molecular weight of PThTA was about 2 × 10⁴ g/mol. The light-emitting properties of the PThTA nanoparticles in an emulsion state were studied with UV-vis absorption and PL spectroscopy, and it was found that the quantum efficiency increased from 1.43 to 3.22 with the polymerization time at an excitation wavelength of 405 nm. Our results provide new insights on surfactant-free oxidative polymerization and may serve as guidelines for the preparation of new conjugated polymer emulsion systems for potential optoelectronic devices.

Original language	English
Pages (from-to)	806-812
Number of pages	7
Journal	polymer
Volume	55
Issue number	3
DOIs	https://doi.org/10.1016/j.polymer.2013.12.056
Publication status	Published - 2014 Feb 12

Bibliographical note

Funding Information:
This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093823). This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2007-0056091) and a grant from the Industrial Technology Development program (K0006005) of the Ministry of Knowledge Economy (MKE) of Korea . This research was supported by the Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2008-2002380/2012-0006227). This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (2010-0019550). This research was also supported by the Converging Center Program through the Ministry of Education, Science and Technology ( 2010K001430 ).

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymer.2013.12.056

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title = "Direct synthetic route for water-dispersible polythiophene nanoparticles via surfactant-free oxidative polymerization",

abstract = "Water-dispersible poly(thiophene-co-3-thiopheneacetic acid) (PThTA) nanoparticles were successfully prepared by Fe3+-catalyzed oxidative polymerization in the absence of a surfactant. This facile method adopted the recyclable FeCl3/H2O2 initiator couple to yield a high conversion of approximately 97%, and the sodium salt of 3-thiopheneacetic acid (TA) was used for the colloidal stability of the PThTA nanoparticles. The particle formation and growth of PThTA were examined with photoluminescence (PL) spectroscopy and time-evolution variation of the particle number in the early period of polymerization. The final average particle size of PThTA was 320 nm, measured by dynamic light scattering (DLS). The number-average molecular weight of PThTA was about 2 × 104 g/mol. The light-emitting properties of the PThTA nanoparticles in an emulsion state were studied with UV-vis absorption and PL spectroscopy, and it was found that the quantum efficiency increased from 1.43 to 3.22 with the polymerization time at an excitation wavelength of 405 nm. Our results provide new insights on surfactant-free oxidative polymerization and may serve as guidelines for the preparation of new conjugated polymer emulsion systems for potential optoelectronic devices.",

author = "Ryu, {Hyun Woog} and Kim, {Yong Seok} and Kim, {Jung Hyun} and Cheong, {In Woo}",

note = "Funding Information: This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093823). This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2007-0056091) and a grant from the Industrial Technology Development program (K0006005) of the Ministry of Knowledge Economy (MKE) of Korea . This research was supported by the Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2008-2002380/2012-0006227). This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (2010-0019550). This research was also supported by the Converging Center Program through the Ministry of Education, Science and Technology ( 2010K001430 ).",

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AU - Kim, Jung Hyun

AU - Cheong, In Woo

N1 - Funding Information: This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093823). This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2007-0056091) and a grant from the Industrial Technology Development program (K0006005) of the Ministry of Knowledge Economy (MKE) of Korea . This research was supported by the Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2008-2002380/2012-0006227). This research was supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (2010-0019550). This research was also supported by the Converging Center Program through the Ministry of Education, Science and Technology ( 2010K001430 ).

PY - 2014/2/12

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N2 - Water-dispersible poly(thiophene-co-3-thiopheneacetic acid) (PThTA) nanoparticles were successfully prepared by Fe3+-catalyzed oxidative polymerization in the absence of a surfactant. This facile method adopted the recyclable FeCl3/H2O2 initiator couple to yield a high conversion of approximately 97%, and the sodium salt of 3-thiopheneacetic acid (TA) was used for the colloidal stability of the PThTA nanoparticles. The particle formation and growth of PThTA were examined with photoluminescence (PL) spectroscopy and time-evolution variation of the particle number in the early period of polymerization. The final average particle size of PThTA was 320 nm, measured by dynamic light scattering (DLS). The number-average molecular weight of PThTA was about 2 × 104 g/mol. The light-emitting properties of the PThTA nanoparticles in an emulsion state were studied with UV-vis absorption and PL spectroscopy, and it was found that the quantum efficiency increased from 1.43 to 3.22 with the polymerization time at an excitation wavelength of 405 nm. Our results provide new insights on surfactant-free oxidative polymerization and may serve as guidelines for the preparation of new conjugated polymer emulsion systems for potential optoelectronic devices.

AB - Water-dispersible poly(thiophene-co-3-thiopheneacetic acid) (PThTA) nanoparticles were successfully prepared by Fe3+-catalyzed oxidative polymerization in the absence of a surfactant. This facile method adopted the recyclable FeCl3/H2O2 initiator couple to yield a high conversion of approximately 97%, and the sodium salt of 3-thiopheneacetic acid (TA) was used for the colloidal stability of the PThTA nanoparticles. The particle formation and growth of PThTA were examined with photoluminescence (PL) spectroscopy and time-evolution variation of the particle number in the early period of polymerization. The final average particle size of PThTA was 320 nm, measured by dynamic light scattering (DLS). The number-average molecular weight of PThTA was about 2 × 104 g/mol. The light-emitting properties of the PThTA nanoparticles in an emulsion state were studied with UV-vis absorption and PL spectroscopy, and it was found that the quantum efficiency increased from 1.43 to 3.22 with the polymerization time at an excitation wavelength of 405 nm. Our results provide new insights on surfactant-free oxidative polymerization and may serve as guidelines for the preparation of new conjugated polymer emulsion systems for potential optoelectronic devices.

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Direct synthetic route for water-dispersible polythiophene nanoparticles via surfactant-free oxidative polymerization

Abstract

Bibliographical note

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