Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 182, Issue 4, Pages 983-988Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2009.01.014
Keywords
Self-assembly; Inorganic/organic; Photochromism; Multilayer; Polyoxometalates
Funding
- National Natural Science Foundation of China [20733006, 50502033, 50720145202]
- Chinese Academy of Sciences, National Basic Research Program of China [2006CB806202, 2007CB936402]
- National High-tech RD program [2006AA03Z314]
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A layered phosphovanadomolybdate/1,10-decanediamine (1,10-DAD) self-assembled ultrathin film was fabricated by means of alternating adsorption of mixed-addenda polyoxometalates (POMs) (phosphovanadomolybdate, H-5[PMo10V2O40]) and 1,10-DAD, and its photochromic properties were investigated. It is found that the self-assembled multilayer (SAM) film shows high-photochromic response, excellent photochromic stability and reversibility. The photochromic behavior of the SAM is closely related to the reduction potentials of addenda atoms in mixed-addenda POMs. In the case of photo-reduced mixed-addenda POMs, the electron is localized on the more reducible atom, and the addenda atoms with higher reduction potentials show prior photochromism compared with those with lower reduction potentials. The coloration speed is improved after introduction of V into molybdenum POM. The well-ordered lamellar structure of the film was well maintained during the coloration. (C) 2009 Elsevier Inc. All rights reserved.
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