Synthesis of conjugated-ionic block copolymers by controlled radical polymerization

Su Lu; Qu Li Fan; Soo Jin Chua; Wei Huang

doi:10.1021/ma020408b

Synthesis of conjugated-ionic block copolymers by controlled radical polymerization

Su Lu, Qu Li Fan, Soo Jin Chua, Wei Huang

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

87 Scopus citations

Abstract

A novel series of well-defined amphiphilic block copolymers containing conjugated poly-(fluorene) (PF) block and coillike poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) were successfully synthesized through atom transfer radical polymerization (ATRP) initialized by a 2-bromoisobutyrate end-capped PF macroinitiator using CuCl/HMTETA (1,1,4,7,10,10-hexamethyltriethylenetetramine) as the catalyst. The first-order kinetics plot indicated a constant number of active species present in the polymerization. The molecular weight and molecular weight distribution were well controlled, implying well-defined block structure of the prepared block copolymers. The chemical structures of the copolymers were confirmed by ¹H NMR studies. The copolymers could be successfully quanternized, and the final conjugated-ionic block copolymers were found to form PF aggregates in water as confirmed by ¹H NMR, UV-vis, and photoluminescence (PL) spectra. PL spectra and quantum efficiency measurement also suggested the formation of excimers within the PF aggregates.

Original language	English
Pages (from-to)	304-310
Number of pages	7
Journal	Macromolecules
Volume	36
Issue number	2
DOIs	https://doi.org/10.1021/ma020408b
State	Published - 28 Jan 2003
Externally published	Yes

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title = "Synthesis of conjugated-ionic block copolymers by controlled radical polymerization",

abstract = "A novel series of well-defined amphiphilic block copolymers containing conjugated poly-(fluorene) (PF) block and coillike poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) were successfully synthesized through atom transfer radical polymerization (ATRP) initialized by a 2-bromoisobutyrate end-capped PF macroinitiator using CuCl/HMTETA (1,1,4,7,10,10-hexamethyltriethylenetetramine) as the catalyst. The first-order kinetics plot indicated a constant number of active species present in the polymerization. The molecular weight and molecular weight distribution were well controlled, implying well-defined block structure of the prepared block copolymers. The chemical structures of the copolymers were confirmed by 1H NMR studies. The copolymers could be successfully quanternized, and the final conjugated-ionic block copolymers were found to form PF aggregates in water as confirmed by 1H NMR, UV-vis, and photoluminescence (PL) spectra. PL spectra and quantum efficiency measurement also suggested the formation of excimers within the PF aggregates.",

author = "Su Lu and Fan, {Qu Li} and Chua, {Soo Jin} and Wei Huang",

year = "2003",

month = jan,

day = "28",

doi = "10.1021/ma020408b",

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volume = "36",

pages = "304--310",

journal = "Macromolecules",

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publisher = "American Chemical Society",

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TY - JOUR

T1 - Synthesis of conjugated-ionic block copolymers by controlled radical polymerization

AU - Lu, Su

AU - Fan, Qu Li

AU - Chua, Soo Jin

AU - Huang, Wei

PY - 2003/1/28

Y1 - 2003/1/28

N2 - A novel series of well-defined amphiphilic block copolymers containing conjugated poly-(fluorene) (PF) block and coillike poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) were successfully synthesized through atom transfer radical polymerization (ATRP) initialized by a 2-bromoisobutyrate end-capped PF macroinitiator using CuCl/HMTETA (1,1,4,7,10,10-hexamethyltriethylenetetramine) as the catalyst. The first-order kinetics plot indicated a constant number of active species present in the polymerization. The molecular weight and molecular weight distribution were well controlled, implying well-defined block structure of the prepared block copolymers. The chemical structures of the copolymers were confirmed by 1H NMR studies. The copolymers could be successfully quanternized, and the final conjugated-ionic block copolymers were found to form PF aggregates in water as confirmed by 1H NMR, UV-vis, and photoluminescence (PL) spectra. PL spectra and quantum efficiency measurement also suggested the formation of excimers within the PF aggregates.

AB - A novel series of well-defined amphiphilic block copolymers containing conjugated poly-(fluorene) (PF) block and coillike poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) were successfully synthesized through atom transfer radical polymerization (ATRP) initialized by a 2-bromoisobutyrate end-capped PF macroinitiator using CuCl/HMTETA (1,1,4,7,10,10-hexamethyltriethylenetetramine) as the catalyst. The first-order kinetics plot indicated a constant number of active species present in the polymerization. The molecular weight and molecular weight distribution were well controlled, implying well-defined block structure of the prepared block copolymers. The chemical structures of the copolymers were confirmed by 1H NMR studies. The copolymers could be successfully quanternized, and the final conjugated-ionic block copolymers were found to form PF aggregates in water as confirmed by 1H NMR, UV-vis, and photoluminescence (PL) spectra. PL spectra and quantum efficiency measurement also suggested the formation of excimers within the PF aggregates.

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U2 - 10.1021/ma020408b

DO - 10.1021/ma020408b

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SN - 0024-9297

VL - 36

SP - 304

EP - 310

JO - Macromolecules

JF - Macromolecules

IS - 2

ER -

Synthesis of conjugated-ionic block copolymers by controlled radical polymerization

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