Author/Authors :
Alvaro، نويسنده , , Mercedes and Aprile، نويسنده , , Carmela and Benitez، نويسنده , , Miriam and Bourdelande، نويسنده , , Jose Luis and Garcia-Garcia، نويسنده , , Hermenegildo and Herance، نويسنده , , Jose Raul، نويسنده ,
Abstract :
A periodic mesoporous SBA-15 silica containing 4,4-(N,N′-diallylaminophenyl)-2,6-diphenylpyrylium ion (BET surface area of 578 m2 g−1, pore size 5.2 nm) exhibits upon excitation at 1064 nm activity for second harmonic generation that is the double than that of an analogous MCM-41 material synthesized under basic conditions using cetyltrimethylammonium bromide. This fact has been explained as arising from the instability of pyrylium to basic pHs.
