Photoluminescent properties of polyoxyethylene alkyl ether-type neutral surfactant templated mesoporous materials CMI-1: The absence of the 1.9Â eV PL band

The photoluminescent properties of a neutral surfactant templated highly ordered mesoporous silica CMI-1 have been studied and compared with those synthesized with cationic surfactant. The absence of the emission at 1.9 eV is for the first time observed and is quite important for opto-electronic nanocomposite preparation using CMI-1 as matrix. Also for the first time, the possible origin of the emission band at 3.89 eV is identified.