TY  - UNPB
ID  - pittir19790
UR  - http://d-scholarship-dev.library.pitt.edu/19790/
A1  - Bowser, Sage R
Y1  - 2014/01/27/
N2  - Ionic liquids (ILs), the class of salts with melting points below 100 °C, are promising alternatives to molecular solvents. Their great chemical tuneability opens the possibility of tailoring ILs for specific tasks; however, data from systematic structure-property studies of ILs, as well as a more complete understanding of the liquid structure and interionic interactions within ILs, are required for the rational design of ILs. 
In this thesis, a systematic study of the effect of alkyl chain length and alkyl chain branching on the transport properties and carbon dioxide solubility in trialkyltriazolium ionic liquids is described. The viscosities, diffusion coefficients, and conductivities of 15 1,2,4-trialkyl-1,2,3-triazolium bis(trifluoromethylsulfonyl)imide ILs are reported, and are found to be greatly reduced in ILs that incorporate multiple branched alkyl groups on the cation. The interrelationships among the transport properties are analyzed by comparing the deviations of the transport properties of each IL from Walden?s Rule, the Stokes-Einstein equation, and the Nernst-Einstein equation. Preliminary evidence is given for a connection between the formation of polar and non-polar nanodomains within ILs, and the Nernst-Einstein deviation ratio. Henry?s Law constants for the solubility of carbon dioxide in the ILs are reported and found to be most strongly correlated to the molar volume of the IL; evidence supporting a relationship between the Nernst-Einstein  deviation ratio and carbon dioxide solubility for a given IL is not found.

KW  - NMR
KW  -  ionic liquids
KW  -  ionicity
KW  -  diffusion
KW  -  Nernst-Einstein
TI  - STRUCTURE AND TRANSPORT IN TRIALKYLTRIAZOLIUM IONIC LIQUIDS: A COMBINED PFG-NMR DIFFUSION AND CONDUCTIVITY STUDY
EP  - 92
AV  - public
ER  -