Abstract
Mesoscopic properties of water-insoluble tetrakis(4-methoxyphenyl) porphyrin J-aggregate in thin film have been investigated by time-resolved scanning near-field optical microscopy. The film was found to be composed of planar microcrystallines with lengths of a few micrometers, widths of ∼100 nm, and ∼20 nm heights. The transmittance spectra are site-specific. This observation might reflect inhomogeneity of the sample, and is related to the broad J-bands compared to those of tetrakis(4-sulfonatophenyl)porphyrin. Excited-state lifetimes, obtained from pump-probe measurements in small domains, were ranging from 10 to 50 ps that are of the same order with the far-field results.
| Original language | English |
|---|---|
| Pages (from-to) | 368-375 |
| Number of pages | 8 |
| Journal | Chemical Physics Letters |
| Volume | 381 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 2003 Nov 14 |
| Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry