Photoluminescence spectroscopy of silica-based mesoporous materials
Article Abstract:
The experimental study of photoluminescence (PL) at 300 and 90 K from the mesoporous silicas (MSs) [ordered (MCM-41) and disordered (DMSs)] of variously sized pores induced either by ArF laser light (lambda (sub exc) = 193 nm) or by Nd:YAG (yttrium-aluminum-garnet) laser light (lambda (sub exc)=266 nm) is reported. The results reveal that PL spectra measured with 266-and 193-nm excitations are somewhat different because of the different mechanisms of excitation: direct one-proton and indirect through the TP-produced free excitons (FEs), respectively.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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Two photoexcitation steps for photometathesis of propene over FSM-16
Article Abstract:
Photometathesis of propene over siliceous mesoporous silica, FSM-16, consisting of two photoexcitation steps is discovered to be a novel type metathesis system. UV light is necessary for the first step, while visible light as well as UV light is effective for the second step is observed.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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Time resolved ultraviolet photoluminescence of mesoporous silica
Article Abstract:
The optical properties of sol-gel synthesized porous silica excited by synchrotron radiation in the 4-10 eV range are studied. The spectral and temporal characteristics of the ultraviolet photoluminescence at about 3.7 eV are reported.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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