Abstract
Periodic mesoporous organosilicas (PMOs) have a well ordered mesoporous structure, a high thermal and mechanical stability and a uniform distribution of organic functionalities in the pore walls. The organic groups allow PMOs to be modified and functionalized by using a wide range of organic reactions. Since their first report in 1999, PMOs have found a vast range of applications, such as for catalysis, adsorbents, low-k films, biomedical supports and also for optical applications. Optical applications are very interesting as PMOs offer the possibility of designing advanced luminescent hybrid materials comprising of organic components, yet with much higher stability and very good processability. Despite their promising possibilities, the optical properties of pristine PMOs and PMOs grafted with d-metal or f-metal ions and complexes have been explored less frequently. In this review, we aimed to overview the exciting light emitting properties of various reported lanthanide PMO hybrid materials and interest the reader in this promising application for lanthanide PMO materials.
Highlights
Periodic Mesoporous Organoslicas (PMOs) are ordered templated mesoporous organosilicas, prepared by employing a surfactant as the template and a bridged silylated precursor [1]
Yang et al reported on the synthesis of 1,10-phenantroline functionalized PMO, which worked as a metal ion sensor based on its photoluminescence properties [32]
The PMO hybrid material grafted with Eu(tta)3, showed showed stronger luminescence properties, indicating that tta worked as a second “antenna” ligand stronger luminescence properties, indicating that tta worked as a second “antenna” ligand in the in the system
Summary
Periodic Mesoporous Organoslicas (PMOs) are ordered templated mesoporous organosilicas, prepared by employing a surfactant as the template and a bridged silylated precursor [1]. Inagaki et al communicated on a biphenylene-bridged PMO with molecular-scale periodicity in the pore walls [9] This is a second example of a potentially fluorescent PMO, back these materials were not investigated for this property. In 2012, Inagaki et al published work in which the fluorescent bipyridine receptor with two silyl groups was synthesized and covalently attached to the pore walls of biphenyl-bridged PMO powder [30]. Yang et al reported on the synthesis of 1,10-phenantroline functionalized PMO, which worked as a metal ion sensor based on its photoluminescence properties [32] This PMO did not show a very high BET surface area (up to 328 m2 /g); it showed good ordering confirmed by PXRD and TEM images. Incorporated into ‘PMO’ materials for multiple applications in nanomedicine, including theranostics
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