analytical-chemistry-formulation-2017-scientifictracks

Notes:

Volume 3, Issue 2

Insights in Analytical Electrochemistry

ISSN: 2470-9867

Analytical Chemistry-Formulation 2017

August 28-30, 2017

Page 33

Annual Congress on

International Conference and Exhibition on

August 28-30, 2017 Brussels, Belgium

Analytical and Bioanalytical Techniques

Pharmaceutical Formulations

Anu Kadyan et al., Insights in Analytical Electrochemistry, 3:2

DOI: 10.21767/2470-9867-C1-003

Fluorescence quenching and diffusion within Li salt added ionic liquid media

Anu Kadyan

and

Siddharth Pandey

Indian Institute of Technology Delhi, India

n the fast-growing world with the ever-increasing need for alternative solvents, ionic liquids are being explored widely in

almost all areas of chemistry. Ionic liquids are room-temperaturemolten salts, composed of ions with notable physicochemical

properties, such as, good thermal stability, high solubility, negligible vapor pressure, and non-flammability, among others.

In the current energy scenario, lithium-ion batteries have proven to be a promising choice for mobile applications. But to

expand its applications to large-scale, we have to cope-up with some of the limitations. Thermal stability is a major issue in the

currently used electrolytes, in lithium ion batteries. While the organic solvents had their own limitations, ionic liquids, because

of their desirable properties, have drawn much attention from researchers as alternative electrolytes for lithium-ion batteries.

To further develop and improve this new alternative class of (ionic liquid + Li salt) electrolyte system for industrial and

commercial purpose, knowledge of diffusion within such systems is of utmost importance. We present a detailed investigation

of fluorescence quenching of a model solute pyrene by an electron/charge acceptor quenching agent nitromethane dissolved

in [1-ethyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide ([emim][Tf

N]) + lithium bis(trifluoromethyl sulfonyl)

imide (LiTf

N)] mixtures in the temperature range (298.15 to 358.15 )K. Various equilibrium quenching constants as well

as bimolecular quenching rate constants are obtained and related to the diffusion behavior within ([emim][Tf

N] + LiTf

system. The result is correlated with the results from fluorescence correlation spectroscopy using a different probe. Details of

diffusion behavior showing versatility of (ionic liquid + Li salt) systems are established.