Investigations of hydrogen-bond networks structure and associated dynamics is relevant being water the most important liquid for life. Water clustering in aqueous solution of tetraethoxysilane was investigated by using the ultraweak Delayed Luminescence (DL). DL induced by UVA laser light was revealed in the 400-800 nm spectral range and temporal decay registered starting 10s after the illumination pulse. By following the natural aging, which modifies the silica phase structure, the temperature was changed from room condition to the supercooled region. Results gave information on activation energy and lifetime analysis of water domains, promoted by the gelation process.
Delayed Luminescence to investigate water structuring in presence of silica network
SCORDINO, Agata;GRASSO, ROSARIA;MUSUMECI, Francesco;
2014-01-01
Abstract
Investigations of hydrogen-bond networks structure and associated dynamics is relevant being water the most important liquid for life. Water clustering in aqueous solution of tetraethoxysilane was investigated by using the ultraweak Delayed Luminescence (DL). DL induced by UVA laser light was revealed in the 400-800 nm spectral range and temporal decay registered starting 10s after the illumination pulse. By following the natural aging, which modifies the silica phase structure, the temperature was changed from room condition to the supercooled region. Results gave information on activation energy and lifetime analysis of water domains, promoted by the gelation process.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
