Projects per year
Abstract
Two new amino core-substituted naphthalene diimides (cNDIs) bearing fluorinated side chains have been synthesised. Steady-state and time-resolved fluorescence spectroscopy reveals unprecedented optical properties for the cNDIs with high quantum yields of ~0.8 and fluorescence lifetimes of ~13 ns in a range of solvents. These properties are apparent at the level of single molecules, where the compounds also show exceptional photostability under pulsed-laser excitation. Photon emission is remarkably consistent with very few long timescale (millisecond or longer) interruptions with molecules regularly undergoing >107 cycles of excitation and emission. Intermittencies owing to triplet-state formation occur on a sub-millisecond timescale with a low yield of 1-2%, indicating that the presence of the fluorine atoms does not lead to a significant triplet yield through the heavy-atom effect. These properties make the compounds excellent candidates for single-molecule labelling applications
Original language | English |
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Pages (from-to) | 4133-4140 |
Number of pages | 8 |
Journal | Chemistry - A European Journal |
Volume | 21 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2015 |
Keywords
- Fluorescence quantum yield
- Naphthalene diimide
- Photostability
- Single-molecule studies
- Timeresolved spectroscopy
Projects
- 1 Finished
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New Generation Functional Materials for 21st Century Applications - Exploiting the Properties of Naphthalene Diimides
Langford, S., Bell, T., Ayyappanpillai, A., Prodi, L. & Thang, S.
Australian Research Council (ARC), Monash University
3/01/13 → 4/08/16
Project: Research