TY  - JOUR
A1  - Tiseanu, Carmen
A1  - Lorenz-Fonfria, Victor A.
A1  - Geßner, André
A1  - Kumke, Michael Uwe
A1  - Gagea, Bogdan
T1  - Comparative luminescence study of terbium-exchanged zeolites silylated with alkoxysilanes
N2  - Terbium-exchanged ZSM-5, MOR and (H)BEA zeolites were silylated with phenyl-, vinyl- and hexadecyl trimethoxysilanes via a post-synthesis grafting. All samples were investigated by means of PXRD, FT-IR, TGA, physical adsorption, DR-UV-Vis and time-resolved photoluminescence spectroscopy. From the comparison of the photoluminescence decays of terbium-exchanged in parent (non-silylated) and silylated zeolites, it resulted that the silylation efficiency of the various alkoxysilanes is determined by the type of zeolite and follows the sequences: phenyl > vinyl > hexadecyl > parent for ZSM-5, hexadecyl a parts per thousand phenyl a parts per thousand vinyl > parent for MOR and hexadecyl > phenyl a parts per thousand vinyl > a parts per thousand parent for BEA zeolites, respectively.
Y1  - 2009
UR  - http://www.springerlink.com/content/100190
U6  - https://doi.org/10.1007/s10854-008-9597-1
SN  - 0957-4522
ER  - 
TY  - JOUR
A1  - Tiseanu, Carmen
A1  - Kumke, Michael Uwe
A1  - Parvulescu, Vasile Ion
A1  - Geßner, Andre
A1  - Gagea, Bogdan
A1  - Martens, Johan
T1  - Europium(3+) : an efficient luminescence probe for the Si to Al ratio and silylation effect in the microporous- mesoporous Zeogrid materials
Y1  - 2008
UR  - http://pubs.acs.org/doi/pdf/10.1021/jp711337h
U6  - https://doi.org/10.1021/Jp711337h
ER  - 
TY  - JOUR
A1  - Tiseanu, Carmen
A1  - Geßner, Andre
A1  - Kumke, Michael Uwe
A1  - Gagea, Bogdan
A1  - Parvulescu, Vasile Ion
A1  - Martens, Johan
T1  - Photoluminescence spectra and dynamics of lanthanide-doped microporous materials
N2  - A series of terbium- and europium-exchanged microporous-mesoporous zeolite Socony Mobil Five (MFI)-type materials such as Zeotile-1 and Zeogrid with varying Si/Al ratios was investigated using FTIR, PXRD, adsorption- desorption isotherms of N-2 at 77 K and time-resolved luminescence spectroscopy. Silylation of the lanthanides-exchanged Zeotile-1 and Zeogrid with hexadecyl trimethoxysilanes via post-synthesis grafting was also studied. The results showed that the lanthanide's photoluminescence spectra and decays were modified due to silylation. The different silylation effects in Zeotile-1 and Zeogrid were correlated with the textural properties of the investigated materials. (C) 2007 Elsevier B.V. All rights reserved.
Y1  - 2008
UR  - http://www.sciencedirect.com/science/article/pii/S0022231307003262
U6  - https://doi.org/10.1016/j.jlumin.2007.10.018
ER  -