Author/Authors :
Anedda، نويسنده , , A. and Carbonaro، نويسنده , , C.M and Clemente، نويسنده , , F. and Corpino، نويسنده , , R. and Grandi، نويسنده , , S. and Mustarelli، نويسنده , , P. and Magistris، نويسنده , , A.، نويسنده ,
Abstract :
Photoluminescence and Raman measurements have been performed on sol–gel synthesized porous silica monoliths. Porous silica and polyethilenglycole/silica hybrids thermally treated at different temperatures have been analyzed. By exciting at 5.6 eV a structured photoluminescence emission centered at 3.7 eV is found in the whole set of samples. Hydration treatment of the pore surfaces increases the H-bonding interaction between silanols, inhibits the isolated silanols vibrations and changes the photoluminescence spectrum increasing the emission peaked at 3.7 eV.
