1. Photoluminescent porous aerogel monoliths containing ZnEu-complex: the first example of aerogel modified with a heteronuclear metal complex
- Author
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Kh. E. Yorov, Gennady P. Kopitsa, O. V. Boytsova, Adél Len, Vitaliy Pipich, Alexander V. Agafonov, Mikhail A. Kiskin, S. А. Lermontov, А. Е. Baranchikov, Vladimir Ivanov, S. Yu. Kottsov, Evgenia A. Varaksina, and Alexey A. Sidorov
- Subjects
Photoluminescence ,Materials science ,Supercritical drying ,Aerogel ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Biomaterials ,Matrix (chemical analysis) ,symbols.namesake ,X-ray photoelectron spectroscopy ,Chemical engineering ,Materials Chemistry ,Ceramics and Composites ,symbols ,Fourier transform infrared spectroscopy ,0210 nano-technology ,Luminescence ,Raman spectroscopy - Abstract
A procedure for the chemical immobilization of a new ZnII–EuIII heterobimetallic complex in the SiO2 aerogel matrix has been developed. In this Zn–Eu complex, a peripheral non-luminescent Zn ion acts as a binder to a silica matrix and prevents direct interaction of rare-earth ions with OH− and NH− groups in the silica matrix, which would have a detrimental effect on the luminescence of lanthanides. The procedure includes the synthesis of complexes, co-gelation of the obtained complex with SiO2 sol, the washing of lyogels, and their subsequent supercritical drying in CO2. The composition and properties of the obtained aerogels were investigated using a low-temperature nitrogen adsorption technique, helium pycnometry, FTIR, Raman, UV–visible, and luminescence spectroscopy, XPS, PXRD, SEM, TEM, TGA combined with mass spectrometry, and small-angle neutron scattering. The aerogels modified with the ZnII–EuIII complex demonstrated strong red luminescence upon excitation with UV light.
- Published
- 2019