Abstract
We studied the two photon absorption (TPA) properties of conjugated, symmetric bis(N-carbazolyl)-di-phenylpolyenes and bis(N-carbazolyl)-tri-phenylpolyenes. These novel molecules relate to the family of bis-donor-di-phenylpolynene recently shown to possess very high two-photon absorption and fluorescence coefficients. The symmetric substitution of carbazole end-groups enhances the photostability of the molecules and at the same time maintains high TP coefficients (δmax>1000 GM) as determined from two-photon fluorescence measurements with picosecond pulse excitation. A blue shift of the linear absorption and a red shift of the TP peak reflect a larger proximity of the one and two photon states in carbazole substituted chromophores. High fluorescence quantum yield (0.6-0.8) was found in most of the molecules studied. These results suggest that efficient and photo-stable TP chromophores with carbazole donors are promising materials for applications in two-photon imaging and sensitization.
Original language | English |
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Pages (from-to) | 269-273 |
Number of pages | 5 |
Journal | Synthetic Metals |
Volume | 115 |
Issue number | 1 |
DOIs | |
State | Published - 1 Nov 2000 |
Event | Proccedings of the European Materials Research Society 1999 Spring Meeting, Symposium N: Molecular Photonics at the Interface of Physics, Chemistry and Biology - Strasbourg, France Duration: 1 Jun 1999 → 4 Jun 1999 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry