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Synthesis and Photochromism of Tungstophosphate-Functionalized Ordered Mesoporous Hybrid Silica

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Abstract:

New tungstophosphate-functionalized ordered mesoporous silica was synthesized based on monovacant PW11 and block copolymer template. Upon characterizations of the as-obtained PW11/MHS samples by FT-IR, XRD, ICP-AES and N2 adsorption–desorption measurements, it was revealed that Keggin units were retained perfectly in hexagonally symmetrical mesopore channels and bound covalently onto the pore walls of mesoporous silica. The material exhibits stable and reversible photochromic property upon UV irradiation even though no a special organic component was supplied as electron donor. This may provide a new approach to construct photochromic materials of potential applications in high-density optical memories and other optical devices.

Keywords: FUNCTIONALIZATION; HYBRID MATERIALS; MESOPOROUS SILICA; PHOTOCHROMISM; TUNGSTOPHOSPHATE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.3127

Publication date: March 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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