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 |
|---|---|
| Pages (from-to) | 1112-1117 |
| Number of pages | 6 |
| Journal | Macromolecules |
| Volume | 41 |
| Issue number | 4 |
| DOIs | |
| State | Published - Feb 26 2008 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Chemistry
Cite this
Optical spectroscopy of grafted poly(p-phenyleneethynylene)s in water and water-DMF mixtures. / Wang, Yiqing; Zappas, Andrew J.; Wilson, James N; Kim, Ik Bum; Solntsev, Kyril M.; Tolbert, Laren M.; Bunz, Uwe H F.
In: Macromolecules, Vol. 41, No. 4, 26.02.2008, p. 1112-1117.Research output: Contribution to journal › Article
}
TY - JOUR
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.
UR - http://www.scopus.com/inward/record.url?scp=40549096782&partnerID=8YFLogxK
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U2 - 10.1021/ma702555f
DO - 10.1021/ma702555f
M3 - Article
AN - SCOPUS:40549096782
VL - 41
SP - 1112
EP - 1117
JO - Macromolecules
JF - Macromolecules
SN - 0024-9297
IS - 4
ER -