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Issue 12, 2013
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A new way to tune relative humidity: by saturated ionic liquid aqueous solutions

Yuanyuan Cao,a  Yu Chena  and  Tiancheng Mu*a 
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* Corresponding authors

a Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
E-mail: tcmu@chem.ruc.edu.cn
Fax: +86-10-62516444
Tel: +86-10-62514925

Abstract

In this paper, a new way to control the relative humidity (RH) by hydrophobic ionic liquids (ILs) was proposed. The influences of cation type, anion type, alkyl chain length, substitution of the cation ring, functionalization, and combinations of ILs on the RH were investigated. The results showed that cation ring, functionalization and temperature had a significant influence on the RH of saturated IL aqueous solutions, while the influence of alkyl chain length was negligible. Then, a repulsion-induced mechanism was proposed to qualitatively explain the RH of saturated IL aqueous solutions. Simply speaking, ILs with high hydrophilicity induce water molecules from the air, thus resulting in a low RH, and vice versa.

Graphical abstract: A new way to tune relative humidity: by saturated ionic liquid aqueous solutions

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Publication details

The article was received on 18 Jun 2013, accepted on 10 Sep 2013 and first published on 11 Sep 2013


Article type: Paper
DOI: 10.1039/C3NJ00661A
Citation: New J. Chem., 2013,37, 3890-3898
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    A new way to tune relative humidity: by saturated ionic liquid aqueous solutions

    Y. Cao, Y. Chen and T. Mu, New J. Chem., 2013, 37, 3890
    DOI: 10.1039/C3NJ00661A

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