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

15 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

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ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

Cite this

Wang, Y., Zappas, A. J., Wilson, J. N., Kim, I. B., Solntsev, K. M., Tolbert, L. M., & Bunz, U. H. F. (2008). Optical spectroscopy of grafted poly(p-phenyleneethynylene)s in water and water-DMF mixtures. Macromolecules, 41(4), 1112-1117. https://doi.org/10.1021/ma702555f

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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.",

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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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10.1021/ma702555f