Photophysical Properties of Nanodiamonds Covalently Bonded to N-Substituted 1,8-Naphthalimide

With the aim of obtaining new fluorescent biomarkers, we have synthesized nanodiamond–dye dyads which form a stable aqueous suspension. In the dyads, by means of nucleophilic substitution of the nitro group, the N-substituted 4-nitro-1,8-naphthalimide was added to the ultradisperse nanodiamonds via...

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Bibliographic Details
Published inJournal of applied spectroscopy Vol. 82; no. 2; pp. 266 - 271
Main Authors Pavlovich, V. S., Lugousky, A. P., Stupak, A. P.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.05.2015
Springer
Subjects
Alkyl groups
Analysis
Analytical Chemistry
Atomic/Molecular Structure and Spectra
Fluorescence
Physics
Physics and Astronomy
N-substituted 1,8-naphthalimide
fluorescence decay
absorption
fluorescence
chemically modified nanodiamond
suspension
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Summary:With the aim of obtaining new fluorescent biomarkers, we have synthesized nanodiamond–dye dyads which form a stable aqueous suspension. In the dyads, by means of nucleophilic substitution of the nitro group, the N-substituted 4-nitro-1,8-naphthalimide was added to the ultradisperse nanodiamonds via a long alkyl chain. We studied the absorption and fluorescence spectra and also the fluorescence decay kinetics for the dyads. We propose that the non-exponential fluorescence decay for the dyads in aqueous suspension is due to two ways to position the plane of the N-substituted 1,8-naphthalimide relative to the plane of the nanodiamond.
ISSN:0021-9037
1573-8647
DOI:10.1007/s10812-015-0096-x