Delayed luminescence induced by complex domains in water and in TEOS aqueous solutions

Literature Information

Publication Date 2015-11-19
DOI 10.1039/C5CP03420E
Impact Factor 3.676
Authors

C. Colleoni, S. Esposito, R. Grasso, D. Romeli, G. Rosace


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Abstract

Many recent studies on water have conjectured a complex structure composed of hydrogen bonded low- and high-density domains. In this work the structure of pure water and aqueous solutions of silica gel (TEOS) has been investigated by using delayed luminescence, which has previously shown a significant increase in aqueous salt solutions where low-density domain formation is expected. Photon emission shows an Arrhenius trend with an activation energy in water–TEOS solutions larger than in pure water and salt-water solutions. Moreover, delayed photon emission decay shows an intrinsic lifetime of about 5 μs both in solutions and in pure water that, along with secondary lifetimes induced by the presence of TEOS, could be related to the formation of different domains.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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