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Selective modification of layered silicate nanoparticle edges with fluorophores
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SYSNO ASEP 0382847 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Selective modification of layered silicate nanoparticle edges with fluorophores Author(s) Bujdák, J. (SK)
Danko, M. (SK)
Chorvát Jr., D. (SK)
Czímerová, A. (SK)
Sýkora, Jan (UFCH-W) RID
Lang, Kamil (UACH-T) SAI, RID, ORCIDSource Title Applied Clay Science. - : Elsevier - ISSN 0169-1317
65-66, SEP 2012 (2012), s. 152-157Number of pages 6 s. Language eng - English Country NL - Netherlands Keywords fluorescence ; fluorophore ; grafited day minerals Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GAP207/10/1447 GA ČR - Czech Science Foundation (CSF) GBP208/12/G016 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40320502 - UACH-T (2005-2011) AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000309570800024 DOI 10.1016/j.clay.2012.04.029 Annotation The modification of two synthetic layered silicates, fluorohectorite (Coming) and laponite (Laporte). with two reactive silanes functionalized with fluorescent rhodamine or naphthalimide led to the grafting of the silicate particles selectively at the particle edges. The small amounts of grafted silanes were neither detected by infrared spectra nor X-ray diffraction (XRD) patterns. The larger extent of modification with cationic rhodamine-based silane was detected by XRD. The absorption and fluorescence spectra of the colloids of grafted silicates were similar to those of silane-dye precursors. Confocal fluorescence microscopy and fluorescence lifetime imaging detected the fluorohectorite-naphthalimide monolayer films to be optically heterogeneous, which was attributed to the selective location of the bound naphthalimide moieties at the particle edges. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2013
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