A novel benzoxazole-containing poly(N-isopropylacrylamide) copolymer as a multifunctional sensing material

Chang Chung Yang; Yanqing Tian; Ching Yi Chen; Alex K.Y. Jen; Wen Chang Chen

doi:10.1002/marc.200600869

A novel benzoxazole-containing poly(N-isopropylacrylamide) copolymer as a multifunctional sensing material

Chang Chung Yang, Yanqing Tian, Ching Yi Chen, Alex K.Y. Jen, Wen Chang Chen

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

49 Scopus citations

Abstract

We report a novel multifunctional material, poly(N-isopropylacrylamide) (PNIPAAm) containing 2-(2-hydroxyphenyl)benzoxazole (HPBO), for sensing pH, zinc ion concentration, or temperature. By titration with zinc ions, a clear blue-shifted emission with a high quantum efficiency was detected since the zinc complex prevented the nonradiative decay pathways of the HPBO moiety. The fluorescence characteristics of the copolymer were similar at various acidic or neutral conditions. However, a large blue shift on the emission maximum was exhibited under the basic condition, due to the disruption of the ESIPT process by the phenolate anion. The LCST affected the fluorescence properties significantly at the basic condition because the incompatibility between the PNIPAAm chain and phenolated HPBO moieties resulted in aggregation formation. The present study demonstrates that the new benzoxazole-containing PINPAAm copolymer could be potentially used as multifunctional sensing material.

Original language	English (US)
Pages (from-to)	894-899
Number of pages	6
Journal	Macromolecular Rapid Communications
Volume	28
Issue number	7
DOIs	https://doi.org/10.1002/marc.200600869
State	Published - Apr 2 2007
Externally published	Yes

Keywords

Benzoxazole
Fluorescence
PNIPAAm
Stimulisensitive polymers
Zinc

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1002/marc.200600869

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title = "A novel benzoxazole-containing poly(N-isopropylacrylamide) copolymer as a multifunctional sensing material",

abstract = "We report a novel multifunctional material, poly(N-isopropylacrylamide) (PNIPAAm) containing 2-(2-hydroxyphenyl)benzoxazole (HPBO), for sensing pH, zinc ion concentration, or temperature. By titration with zinc ions, a clear blue-shifted emission with a high quantum efficiency was detected since the zinc complex prevented the nonradiative decay pathways of the HPBO moiety. The fluorescence characteristics of the copolymer were similar at various acidic or neutral conditions. However, a large blue shift on the emission maximum was exhibited under the basic condition, due to the disruption of the ESIPT process by the phenolate anion. The LCST affected the fluorescence properties significantly at the basic condition because the incompatibility between the PNIPAAm chain and phenolated HPBO moieties resulted in aggregation formation. The present study demonstrates that the new benzoxazole-containing PINPAAm copolymer could be potentially used as multifunctional sensing material.",

keywords = "Benzoxazole, Fluorescence, PNIPAAm, Stimulisensitive polymers, Zinc",

author = "Yang, {Chang Chung} and Yanqing Tian and Chen, {Ching Yi} and Jen, {Alex K.Y.} and Chen, {Wen Chang}",

year = "2007",

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doi = "10.1002/marc.200600869",

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T1 - A novel benzoxazole-containing poly(N-isopropylacrylamide) copolymer as a multifunctional sensing material

AU - Yang, Chang Chung

AU - Tian, Yanqing

AU - Chen, Ching Yi

AU - Jen, Alex K.Y.

AU - Chen, Wen Chang

PY - 2007/4/2

Y1 - 2007/4/2

N2 - We report a novel multifunctional material, poly(N-isopropylacrylamide) (PNIPAAm) containing 2-(2-hydroxyphenyl)benzoxazole (HPBO), for sensing pH, zinc ion concentration, or temperature. By titration with zinc ions, a clear blue-shifted emission with a high quantum efficiency was detected since the zinc complex prevented the nonradiative decay pathways of the HPBO moiety. The fluorescence characteristics of the copolymer were similar at various acidic or neutral conditions. However, a large blue shift on the emission maximum was exhibited under the basic condition, due to the disruption of the ESIPT process by the phenolate anion. The LCST affected the fluorescence properties significantly at the basic condition because the incompatibility between the PNIPAAm chain and phenolated HPBO moieties resulted in aggregation formation. The present study demonstrates that the new benzoxazole-containing PINPAAm copolymer could be potentially used as multifunctional sensing material.

AB - We report a novel multifunctional material, poly(N-isopropylacrylamide) (PNIPAAm) containing 2-(2-hydroxyphenyl)benzoxazole (HPBO), for sensing pH, zinc ion concentration, or temperature. By titration with zinc ions, a clear blue-shifted emission with a high quantum efficiency was detected since the zinc complex prevented the nonradiative decay pathways of the HPBO moiety. The fluorescence characteristics of the copolymer were similar at various acidic or neutral conditions. However, a large blue shift on the emission maximum was exhibited under the basic condition, due to the disruption of the ESIPT process by the phenolate anion. The LCST affected the fluorescence properties significantly at the basic condition because the incompatibility between the PNIPAAm chain and phenolated HPBO moieties resulted in aggregation formation. The present study demonstrates that the new benzoxazole-containing PINPAAm copolymer could be potentially used as multifunctional sensing material.

KW - Benzoxazole

KW - Fluorescence

KW - PNIPAAm

KW - Stimulisensitive polymers

KW - Zinc

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A novel benzoxazole-containing poly(N-isopropylacrylamide) copolymer as a multifunctional sensing material

Abstract

Keywords

ASJC Scopus subject areas

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