Giant ring polyfluorenes:One-pot synthesis by the Yamamoto-coupling reaction and optical properties

Michiya Fujiki; Takanori Murao; Masanobu Naito; Giseup Kwak; Naosuke Hotta; Yoko Nakano

Giant ring polyfluorenes:One-pot synthesis by the Yamamoto-coupling reaction and optical properties

Michiya Fujiki, Takanori Murao, Masanobu Naito, Giseup Kwak, Naosuke Hotta, Yoko Nakano

Nara Institute of Science and Technology

Research output: Contribution to conference › Paper › peer-review

Abstract

π-Conjugated polyfluorenes were prepared by the Yamamoto coupling reaction. AFM observation revealed that single molecules of polyfluorenes bearing isopentyl, n-hexyl, or n-heptyl side groups at the 9-positions can adopt giant ring structure with 100-150 nm in diameter on mica. Other derivatives with n-alkyl side chains, however, gave dot-like structures. Polyfluorene derivatives with fluorine termini, also, showed the similar dot-like forms.Only giant ring polyfluorenes on quartz showed green photoluminescence peaking at 550 nm, while chain-like olyfluorenes showed no such emission.

Original language	English
Pages	2772-2773
Number of pages	2
State	Published - 2005
Event	54th SPSJ Symposium on Macromolecules - Yamagata, Japan Duration: 20 Sep 2005 → 22 Sep 2005

Conference

Conference	54th SPSJ Symposium on Macromolecules
Country/Territory	Japan
City	Yamagata
Period	20/09/05 → 22/09/05

Keywords

Giant ring
Photoluminescence
Polyfluorene

Cite this

@conference{c7b6af9371b0448b86c0811a506553be,

title = "Giant ring polyfluorenes:One-pot synthesis by the Yamamoto-coupling reaction and optical properties",

abstract = "π-Conjugated polyfluorenes were prepared by the Yamamoto coupling reaction. AFM observation revealed that single molecules of polyfluorenes bearing isopentyl, n-hexyl, or n-heptyl side groups at the 9-positions can adopt giant ring structure with 100-150 nm in diameter on mica. Other derivatives with n-alkyl side chains, however, gave dot-like structures. Polyfluorene derivatives with fluorine termini, also, showed the similar dot-like forms.Only giant ring polyfluorenes on quartz showed green photoluminescence peaking at 550 nm, while chain-like olyfluorenes showed no such emission.",

keywords = "Giant ring, Photoluminescence, Polyfluorene",

author = "Michiya Fujiki and Takanori Murao and Masanobu Naito and Giseup Kwak and Naosuke Hotta and Yoko Nakano",

year = "2005",

language = "English",

pages = "2772--2773",

note = "54th SPSJ Symposium on Macromolecules ; Conference date: 20-09-2005 Through 22-09-2005",

}

TY - CONF

T1 - Giant ring polyfluorenes:One-pot synthesis by the Yamamoto-coupling reaction and optical properties

AU - Fujiki, Michiya

AU - Murao, Takanori

AU - Naito, Masanobu

AU - Kwak, Giseup

AU - Hotta, Naosuke

AU - Nakano, Yoko

PY - 2005

Y1 - 2005

N2 - π-Conjugated polyfluorenes were prepared by the Yamamoto coupling reaction. AFM observation revealed that single molecules of polyfluorenes bearing isopentyl, n-hexyl, or n-heptyl side groups at the 9-positions can adopt giant ring structure with 100-150 nm in diameter on mica. Other derivatives with n-alkyl side chains, however, gave dot-like structures. Polyfluorene derivatives with fluorine termini, also, showed the similar dot-like forms.Only giant ring polyfluorenes on quartz showed green photoluminescence peaking at 550 nm, while chain-like olyfluorenes showed no such emission.

AB - π-Conjugated polyfluorenes were prepared by the Yamamoto coupling reaction. AFM observation revealed that single molecules of polyfluorenes bearing isopentyl, n-hexyl, or n-heptyl side groups at the 9-positions can adopt giant ring structure with 100-150 nm in diameter on mica. Other derivatives with n-alkyl side chains, however, gave dot-like structures. Polyfluorene derivatives with fluorine termini, also, showed the similar dot-like forms.Only giant ring polyfluorenes on quartz showed green photoluminescence peaking at 550 nm, while chain-like olyfluorenes showed no such emission.

KW - Giant ring

KW - Photoluminescence

KW - Polyfluorene

UR - http://www.scopus.com/inward/record.url?scp=33645580365&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:33645580365

SP - 2772

EP - 2773

T2 - 54th SPSJ Symposium on Macromolecules

Y2 - 20 September 2005 through 22 September 2005

ER -

Giant ring polyfluorenes:One-pot synthesis by the Yamamoto-coupling reaction and optical properties

Abstract

Conference

Keywords

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