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Molecular ordering ...
Molecular ordering in monolayers of an alkyl-Substituted perylene-bisimide dye by attenuated total reflectance ultraviolet-visible spectroscopy
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- Doherty, Walter J (författare)
- University of Arizona
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- Simmonds, A.G. (författare)
- Department of Chemistry, University of Arizona, Tucson, AZ 85721
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- Mendes, S.B. (författare)
- Department of Chemistry, University of Arizona, Tucson, AZ 85721, Optical Sciences Center, University of Arizona, Tucson, AZ 85721
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- Armstrong, N.R. (författare)
- Department of Chemistry, University of Arizona, Tucson, AZ 85721, Optical Sciences Center, University of Arizona, Tucson, AZ 85721
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- Saavedra, S.S. (författare)
- Department of Chemistry, University of Arizona, Tucson, AZ 85721
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(creator_code:org_t)
- 2016-08-31
- 2005
- Engelska.
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Ingår i: Applied Spectroscopy. - : SAGE Publications. - 0003-7028 .- 1943-3530. ; 59:10, s. 1248-1256
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Surface-relative orientational parameters were determined for monolayer films of N, N'-ditridecylperylenetetracarboxylic dianhydridediimide (C 13-PTCDI) in terms of the relative electronic transition dipole strengths, providing a three-dimensional view of the absorption dipole distribution. In order to obtain a macroscopically ordered film, C 13-PTCDI was deposited by (1) horizontal Langmuir-Blodgett (LB) transfer onto methyl- and phenyl-silanized glass, and (2) vapor deposition onto oriented films of poly(tetrafluoroethylene) (PTFE) on glass. Films of LB-deposited C13-PTCDI were found to be completely Isotropic prior to annealing. After annealing, these films remained isotropic in the plane of the substrate while the out-of-plane anisotropy was significantly enhanced. In contrast, films of C13-PTCDI vapor deposited onto oriented poly(tetrafluoroethylene) (PTFE)-modified substrates yielded films with a high degree of both in- and out-of-plane anisotropy. Atomic force microscopy (AFM) images of both the LB- and vapor-deposited films show substantial differences in film morphology and long-range order. These results demonstrate that molecular orientation in C13-PTCDI films can be controlled by varying substrate surface chemistry and post-deposition processing. © 2005 Society for Applied Spectroscopy.
Nyckelord
- ATR
- Attenuated total reflection
- Molecular orientation
- Perylene
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- TEKNIKVETENSKAP
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