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Self-Assembly and Molecular Dynamics of Oligoindenofluorenes
- Source :
- ChemPhysChem. 7:1431-1441
- Publication Year :
- 2006
- Publisher :
- Wiley, 2006.
-
Abstract
- The optical properties, self assembly mechanism, thermal properties, and the associated molecular dynamics of a series of stable blue-emitting oligoindenofluorenes up to the polymer were investigated by photoluminescence, wide-angle X-ray scattering, polarizing optical microscopy, differential scanning calorimetry, and di-electric spectroscopy. Oligomers of indenofluorenes possess high structural order and form smectic mesophases, as opposed to the nematic mesophases formed in the corresponding oligofluorenes. The a-process associated with the liquid-to-glass transition displays an asymmetric broadening of relaxation times (non- Debye process), with a non-Arrhenius temperature dependance of relaxation times and a strong molecular weight dependance. The low dielectric loss and low ionic conductivity revealed the absence of ketone structural defects, which is consistent with the observed stable blue emission. Chemphyschem
- Subjects :
- monodisperse oligofluorenes
Photoluminescence
Photochemistry
Surface Properties
Molecular Conformation
gap
Dielectric
Molecular dynamics
polyfluorenes
Differential scanning calorimetry
structure-property relationships
mesophases
Liquid crystal
Polymer chemistry
luminescence
Scattering, Radiation
oligomers
Physical and Theoretical Chemistry
dielectric spectroscopy
polymers
Ions
Fluorenes
Calorimetry, Differential Scanning
Chemistry, Physical
Chemistry
X-Rays
Electric Conductivity
Temperature
self assembly
molecular dynamics
Atomic and Molecular Physics, and Optics
Dielectric spectroscopy
optical-properties
Condensed Matter::Soft Condensed Matter
Spectrophotometry
Chemical physics
Relaxation (physics)
Spectrophotometry, Ultraviolet
Dielectric loss
Glass
blue-light emission
Dimerization
Subjects
Details
- ISSN :
- 14394235
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- ChemPhysChem
- Accession number :
- edsair.doi.dedup.....6ea530d8d7edde21fd066adf13592095
- Full Text :
- https://doi.org/10.1002/cphc.200600015