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

被引：7

作者：

Colleoni, C. ^{[1
]}

Esposito, S. ^{[2
]}

Grasso, R. ^{[3
]}

Gulino, M. ^{[3
,4
]}

Musumeci, F. ^{[3
,5
]}

Romeli, D. ^{[1
]}

Rosace, G. ^{[1
]}

Salesi, G. ^{[1
,6
]}

Scordino, A. ^{[3
,5
]}

机构：

[1] Univ Bergamo, Dipartimento Ingn & Sci Applicate, Viale Marconi 5, Dalmine, Italy

[2] Ist Nazl Fis Nucl, Sez Napoli, Via Cinthia, I-80125 Naples, Italy

[3] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95129 Catania, Italy

[4] Univ Enna Kore, Fac Ingn & Architettura, Enna, Italy

[5] Univ Catania, Dipartimento Fis & Astron, Catania, Italy

[6] Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2016年 / 18卷 / 02期

关键词：

SOL-GEL; UNDERLYING DISTRIBUTIONS; SPECTRAL-ANALYSIS; LIQUID WATER; TEMPERATURE; DECAYS; PHOTOLUMINESCENCE; SPECTROSCOPY; HYDROLYSIS; CELLS;

D O I：

10.1039/c5cp03420e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 mu s 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.

引用

页码：772 / 780

页数：9

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