Abstract
It is shown that the time‐resolved fluorescence (TRF) spectra and the red edge effect (REE) phenomena are useful tools to observe the twisted intramolecular charge transfer (TICT) band, of 4‐dimethylaminobenzonitrile (DMABN) in nonhydrogen‐bonding polymers. The TRF results show that the relative intensity of the TICT band increases with the increase of time after excitation in all polymers used. The highest TICT relative intensity is observed in poly(butyl methacrylate) (PBMA) polymer matrix, which has a medium polarity and medium free volume compared with either poly(methylmethacrylate) (PHMA), which is more polar and more rigid, or poly(hexylmethacrylate) (PHMA), which is less polar and less rigid than PBMA polymer matrix. The lifetimes are rationalized to the opposite roles of local polarity and local free volume of polymer sites on TICT emission. © 1995 John Wiley & Sons, Inc.
| Original language | English |
|---|---|
| Pages (from-to) | 725-730 |
| Number of pages | 6 |
| Journal | Journal of Polymer Science Part B: Polymer Physics |
| Volume | 33 |
| Issue number | 4 |
| DOIs | |
| State | Published - Mar 1995 |
Keywords
- dimethylaminobenzonitrile
- electron transfer
- free volume
- polymers
- red edge effect
- time‐resolved fluorescence
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Materials Chemistry