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Int. J. Mol. Sci. 2006, 7(12), 590-600; doi:10.3390/i7120590
Article

Laser photolysis study of anthraquinone in binary mixtures ofionic liquid [bmim][PF6] and organic solvent

1, 1, 1,* , 1, 1, 1 and 1
Received: 14 September 2006; Accepted: 14 November 2006 / Published: 19 December 2006
(This article belongs to the Special Issue Ionic Liquids)
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Abstract: Photochemical properties of the ionic liquid (RTIL) 1-butyl-3-methylimidazoliumhexafluorophosphate [bmim][PF6] and its binary mixed solutions with organic solvent(DMF and MeCN) were investigated by laser photolysis at an excitation wavelength of 355nm, using anthraquinone (AQ) as a probe molecule. It was indicated that the triplet excitedstate of AQ (3AQ*) can abstract hydrogen from [bmim][PF6]. Moreover, along with thechange of the ratio of RTIL and organic solvent, the reaction rate constant changes regularly.Critical points were observed at volume fraction VRTIL = 0.2 for RTIL/MeCN and VRTIL =0.05 for RTIL/DMF. For both systems, before the critical point, the rate constant increasesrapidly with increasing VRTIL; however, it decreases obviously with VRTIL after the criticalpoint. We conclude that the concentration dependence is dominant at lower VRTIL, while theviscosity and phase transformation are dominant at higher VRTIL for the effect of ionic liquidon the decay of rate constant.
Keywords: 1-butyl-3-methylimidazolium hexafluorophosphate; Laser photolysis; Anthraquinone; Rate constant 1-butyl-3-methylimidazolium hexafluorophosphate; Laser photolysis; Anthraquinone; Rate constant
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Zhu, G.; Xu, J.; Wu, G.; Zhu, H.; Long, D.; Chen, S.; Yao, S. Laser photolysis study of anthraquinone in binary mixtures ofionic liquid [bmim][PF6] and organic solvent. Int. J. Mol. Sci. 2006, 7, 590-600.

AMA Style

Zhu G, Xu J, Wu G, Zhu H, Long D, Chen S, Yao S. Laser photolysis study of anthraquinone in binary mixtures ofionic liquid [bmim][PF6] and organic solvent. International Journal of Molecular Sciences. 2006; 7(12):590-600.

Chicago/Turabian Style

Zhu, Guanglai; Xu, Jingjing; Wu, Guozhong; Zhu, Hongping; Long, Dewu; Chen, Shimou; Yao, Side. 2006. "Laser photolysis study of anthraquinone in binary mixtures ofionic liquid [bmim][PF6] and organic solvent." Int. J. Mol. Sci. 7, no. 12: 590-600.



Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert