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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Giorgetti, E. Dobrikov, G. Ivanova, D. Timtcheva, I. del Rosso, T. Margheri, G. Ferrari, M. Chiappini, A. |
| Copyright Year | 2009 |
| Description | Author affiliation: Istituto dei Sistemi Complessi ISC - CNR Sezione di Firenze SC-CNR, Sesto Fiorentino, Italy (Giorgetti, E.; del Rosso, T.; Margheri, G.) || CNR-IFN, Istituto di Fotonica e Nanotecnologie - Trento, Povo, Italy (Ferrari, M.; Chiappini, A.) || Institute of Organic Chemistry with Centre of Phytochemistry at the Bulgarian Academy of Sciences, Sofia, Bulgaria (Dobrikov, G.; Ivanova, D.; Timtcheva, I.) |
| Abstract | Design and synthesis of new organic luminophores with desired structure and photophysical properties for application as fluorescent markers for noble metal nanoparticles is performed. The novel luminophores are 4methoxy- and 4-pyrollidine derivatives of 1,8-naphtalimide bearing at the imide N atom long methylene chain with SH end groups, which enables their covalent binding to noble metals. The steady state and dynamic photophysical characteristics of the lowest lying singlet and triplet electronically excited states of naphthalimides that specify the luminescence properties of organic molecules on the basis of UV-VIS absorption and fluorescence spectroscopy in solution are determined. The 4-methoxy substituted naphtalimide has strong fluorescence in solution in the blue region of the spectrum at 420 – 450 nm, while the 4-pyrollidine-derivative is characterized by intensive green emission around 500 – 540 nm. The corresponding relative fluorescence quantum yields are extremely high - up to 0.9. The measured natural life time of the first singlet electronically state of 4-methoxy- and 4-pyrrolodine-naphthalimide is between 6 and 10 ns. The novel organic luminophores are applied for fluorescence labeling of both synthetically prepared monolayer protected clusters of Au nanoparticles, and of Au and Ag nanoparticles obtained by picosecond laser ablation. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 262261 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424448258 |
| e-ISBN | 9781424448272 |
| DOI | 10.1109/ICTON.2009.5185235 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-06-28 |
| Publisher Place | Portugal |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Nanoparticles Fluorescence Gold Steady-state Luminescence Absorption Spectroscopy Time measurement Labeling Protection photophysical characteristics organic fluorophores noble metal nanoparticles surface plasmon absorption |
| Content Type | Text |
| Resource Type | Article |
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