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Photo- and solvatochromic properties of nitrobenzospiropyran in ionic liquids containing the [NTf2]- anion
Byrne, Robert; Diamond, Dermot; Fraser, Kevin J.; Izgorodina, Ekaterina; Forsyth, Maria; MacFarlane, Douglas R.
The photo-, thermo- and solvatochromic properties of 2,3-dihydro-10,30,30-trimethyl-6-nitrospiro- [1-benzopyran-2,20-1H-indole] (BSP-NO2) were studied in ILs containing the anion [NTf2]- by UV-Vis absorption spectroscopy, ab initio molecular orbital theory and density functional theory (DFT) calculations. It was found that the kinetics and thermodynamics of the BSP-NO2 MC (merocyanine) equilibrium was sensitive to the nature of the cation. It was also observed that the imidazolium cation can form a through-space orbital interaction with the MC isomer, rather than a simple electrostatic interaction, thus preventing the MC conversion back to the BSP-NO2 isomer. The BSP-NO2 MC equilibrium thus serves as a model system for studying modes of interaction of the cations in ionic liquids.
Keyword(s): Chemistry
Publication Date:
2008
Type: Other
Peer-Reviewed: Unknown
Language(s): English
Institution: Dublin City University
Citation(s): Byrne, Robert, Diamond, Dermot ORCID: 0000-0003-2944-4839 <https://orcid.org/0000-0003-2944-4839>, Fraser, Kevin J. ORCID: 0000-0002-9718-5405 <https://orcid.org/0000-0002-9718-5405>, Izgorodina, Ekaterina, Forsyth, Maria and MacFarlane, Douglas R. (2008) Photo- and solvatochromic properties of nitrobenzospiropyran in ionic liquids containing the [NTf2]- anion. Physical Chemistry Chemical Physics, 10 . pp. 5919-5924. ISSN 1463-9084
Publisher(s): Royal Society of Chemistry
File Format(s): application/pdf; image/gif
Related Link(s): http://doras.dcu.ie/14789/1/rsc_cp_b806641h.pdf,
http://doras.dcu.ie/14789/2/b806641h-ga.gif,
http://dx.doi.org/10.1039/b806641h
First Indexed: 2009-11-05 02:01:39 Last Updated: 2019-02-09 06:58:20