Negative Absorption Peaks in Ultraviolet-Visible Spectrum of Water

被引：21

作者：

Ji, Yan ^{[1
]}

Ji, Zhi ^{[2
]}

Yao, Meihuan ^{[1
]}

Qian, Ying ^{[3
]}

Peng, Yufeng ^{[4
]}

机构：

[1] Henan Normal Univ, Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China

[2] Guiyang Univ, Coll Chem & Mat Engn, Guiyang 550005, Guizhou, Peoples R China

[3] Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Jiangsu, Peoples R China

[4] Henan Normal Univ, Coll Phys Elect & Engn, Xinxiang 453007, Henan, Peoples R China

来源：

CHEMISTRYSELECT | 2016年 / 1卷 / 13期

关键词：

UV-vis absorption spectra; Negative absorption peaks; Water; Emission; DIFFUSION; DNA;

D O I：

10.1002/slct.201600587

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ultraviolet-visible absorption spectra exhibit absorption that is under the base line, which we propose is negative absorption (NA) or negative absorption emission (NAE). The UV-visible NAE of water, ethanol, and chloroform was illustrated by transmittance curves, reflectivity curves, and fluorescence excitation/emission spectra. To explain this phenomenon, the TD_DFT theory was used to calculate the emission states of the samples. A laser transmission experiment confirmed the NAE phenomenon. It was concluded that NAE was a type of emission produced by the sample. The NAE of water has significant implications for life on earth, which will interest researchers in physics, chemistry, and biology.

引用

页码：3443 / 3448

页数：6

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