Optical spectroscopy of grafted poly(p-phenyleneethynylene)s in water and water-DMF mixtures

Yiqing Wang; Andrew J. Zappas; James N. Wilson; Ik Bum Kim; Kyril M. Solntsev; Laren M. Tolbert; Uwe H.F. Bunz

doi:10.1021/ma702555f

Optical spectroscopy of grafted poly(p-phenyleneethynylene)s in water and water-DMF mixtures

Yiqing Wang, Andrew J. Zappas, James N. Wilson, Ik Bum Kim, Kyril M. Solntsev, Laren M. Tolbert, Uwe H.F. Bunz

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

16 Scopus citations

Abstract

The synthesis and spectral characterization of three grafted poly(p-phenyleneethynylene)s (PPE) are reported. These polymers contain identical chromophores/fluorophores yet show different absorption and emission spectra in DMF and DMF-water mixtures. While some of the spectral properties of the PPEs are ' similar to those of didodecyl-PPE, their spectroscopic properties in DMF-water mixtures differ significantly from those of didodecyl-PPE in CHCl₃. An example is the lactide-substituted PPE, which shows absorption spectra that are reminiscent of those obtained for didodecyl-PPE in poor solvents but emission spectra that resemble those of didodecyl-PPE in a good solvent. Emission shifts occur in these PPEs when going from DMF to water. In the case of the lactide-PPE, a surprising hypsochromic emission shift of 10 nm is observed. This apparent shift is attributed to the preferred aggregation and self-quenching of the longer chains, leaving shorter, blue-emissive chains nonaggregated.

Original language	English (US)
Pages (from-to)	1112-1117
Number of pages	6
Journal	Macromolecules
Volume	41
Issue number	4
DOIs	https://doi.org/10.1021/ma702555f
State	Published - Feb 26 2008
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Optical spectroscopy of grafted poly(p-phenyleneethynylene)s in water and water-DMF mixtures",

abstract = "The synthesis and spectral characterization of three grafted poly(p-phenyleneethynylene)s (PPE) are reported. These polymers contain identical chromophores/fluorophores yet show different absorption and emission spectra in DMF and DMF-water mixtures. While some of the spectral properties of the PPEs are ' similar to those of didodecyl-PPE, their spectroscopic properties in DMF-water mixtures differ significantly from those of didodecyl-PPE in CHCl3. An example is the lactide-substituted PPE, which shows absorption spectra that are reminiscent of those obtained for didodecyl-PPE in poor solvents but emission spectra that resemble those of didodecyl-PPE in a good solvent. Emission shifts occur in these PPEs when going from DMF to water. In the case of the lactide-PPE, a surprising hypsochromic emission shift of 10 nm is observed. This apparent shift is attributed to the preferred aggregation and self-quenching of the longer chains, leaving shorter, blue-emissive chains nonaggregated.",

author = "Yiqing Wang and Zappas, {Andrew J.} and Wilson, {James N.} and Kim, {Ik Bum} and Solntsev, {Kyril M.} and Tolbert, {Laren M.} and Bunz, {Uwe H.F.}",

year = "2008",

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T1 - Optical spectroscopy of grafted poly(p-phenyleneethynylene)s in water and water-DMF mixtures

AU - Wang, Yiqing

AU - Zappas, Andrew J.

AU - Wilson, James N.

AU - Kim, Ik Bum

AU - Solntsev, Kyril M.

AU - Tolbert, Laren M.

AU - Bunz, Uwe H.F.

PY - 2008/2/26

Y1 - 2008/2/26

N2 - The synthesis and spectral characterization of three grafted poly(p-phenyleneethynylene)s (PPE) are reported. These polymers contain identical chromophores/fluorophores yet show different absorption and emission spectra in DMF and DMF-water mixtures. While some of the spectral properties of the PPEs are ' similar to those of didodecyl-PPE, their spectroscopic properties in DMF-water mixtures differ significantly from those of didodecyl-PPE in CHCl3. An example is the lactide-substituted PPE, which shows absorption spectra that are reminiscent of those obtained for didodecyl-PPE in poor solvents but emission spectra that resemble those of didodecyl-PPE in a good solvent. Emission shifts occur in these PPEs when going from DMF to water. In the case of the lactide-PPE, a surprising hypsochromic emission shift of 10 nm is observed. This apparent shift is attributed to the preferred aggregation and self-quenching of the longer chains, leaving shorter, blue-emissive chains nonaggregated.

AB - The synthesis and spectral characterization of three grafted poly(p-phenyleneethynylene)s (PPE) are reported. These polymers contain identical chromophores/fluorophores yet show different absorption and emission spectra in DMF and DMF-water mixtures. While some of the spectral properties of the PPEs are ' similar to those of didodecyl-PPE, their spectroscopic properties in DMF-water mixtures differ significantly from those of didodecyl-PPE in CHCl3. An example is the lactide-substituted PPE, which shows absorption spectra that are reminiscent of those obtained for didodecyl-PPE in poor solvents but emission spectra that resemble those of didodecyl-PPE in a good solvent. Emission shifts occur in these PPEs when going from DMF to water. In the case of the lactide-PPE, a surprising hypsochromic emission shift of 10 nm is observed. This apparent shift is attributed to the preferred aggregation and self-quenching of the longer chains, leaving shorter, blue-emissive chains nonaggregated.

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