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Thermal reversion of spirooxazine in ionic liquids containing the [NTf2]- anion

Coleman, Simon and Byrne, Robert and Diamond, Dermot and Minkovska, Stela (2009) Thermal reversion of spirooxazine in ionic liquids containing the [NTf2]- anion. Physical Chemistry Chemical Physics, 11 . pp. 5608-5614. ISSN 1463-9084

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Abstract

We have compared the rate of thermal reversion of Spirooxazine (SO) from its merocyanine (MC) form within ionic liquids and molecular solvents. Et(30) and Kamlet-Taft parameter studies indicate ILs are comparable to polar protic and aprotic solvents. The observed reversion kinetics within the ionic liquids were slower than that of molecular solvents with similar polarity, indicating a greater degree of interactions between the ionic liquid ions and the zwitterionic MC isomer, which led to increased lifetimes for the MC-ion complexes. Pre-metathesis cleaning of precursor salts was found to be necessary in order to obtain spectroscopic grade ILs for physiochemical analysis using solvatochromic probe dyes.

Item Type:Article (Published)
Refereed:Yes
Subjects:Physical Sciences > Photochemistry
Physical Sciences > Chemistry
DCU Faculties and Centres:Research Initiatives and Centres > Biomedical Diagnostics Institute (BDI)
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Publisher:Royal Society of Chemistry
Official URL:http://dx.doi.org/10.1039/b901417a
Copyright Information:© the Owner Societies 2009
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Science Foundation Ireland
ID Code:14788
Deposited On:07 Aug 2009 13:43 by Robert Byrne. Last Modified 08 May 2010 04:02

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