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Multifunctional ionic liquids and their use in the formation of co-ordinated structures

Kavanagh, Andrew, Byrne, Robert, Diamond, Dermot orcid logoORCID: 0000-0003-2944-4839 and Radu, Aleksandar (2009) Multifunctional ionic liquids and their use in the formation of co-ordinated structures. In: Coil-3 2009 - 3rd International Congress on Ionic Liquids, 31 May - 4 June 2009, Cairns, Australia.

Abstract
We report the use of phosphonium based ionic liquids (ILs) as multifunctional systems for the formation of transition metal ion coordinated polymers. The ILs studied included a tetraalkylated phosphonium cation; [PCnH2n+1]+ and the anions dicyanamide [DCA]- , bis(trifluoromethanesulfonyl)amide [NTf2]-, tosylate [TOS]-, and dodecylbenzenesulfonate [DBSA]-. [DCA]- and other pseudohalide anions such as tricyanomethanide [TCM]- have been shown to co-ordinate to heavy metal centres1. A survey of the literature shows many reports in which [DCA]- (as an alkali salt) has been shown to co-ordinate to these transition metals in various 2-D and 3-D topologies and most notably in structures exhibiting magnetic properties2. We have studied the IL [P6,6,6,14][DCA] as a self-indicating, simultaneous, multianalyte recognition system for heavy metal ions such as Cu2+ and Co2+. When incorporated into a polymer membrane, this system maintains all these attractive features with the added bonus of the IL now being self-plasticizing. A system like this can be viewed as a building block for future chemical sensing platforms; where the system itself is responsive toward an analyte, thereby eliminating the need for a reactive chromophore. Other anions mentioned are considered to be “soft” or non-coordinating. We have used heat to change the chemistry of these anions, resulting in ion coordination to previously solvating anions. These solvating anions have in common a sulfoxide moiety that can co-ordinate to a given heavy metal.3 The formation of these structures has been characterized via UV/Vis, Infrared and Raman Spectroscopy.
Metadata
Item Type:Conference or Workshop Item (Poster)
Event Type:Conference
Refereed:No
Subjects:Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Enterprise Ireland, EI 07/RFP/MASF812, Science Foundation Ireland, SFI 07/CE/I1147
ID Code:4632
Deposited On:24 Jun 2009 09:43 by Andrew Kavanagh . Last Modified 18 Sep 2018 15:24
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