1. ABSTRACT
Pollution is defined as the existence of various hazardous chemicals, toxic substances
and biological organisms into the air, water and earth environment. There are various
factors causing air pollution, but what comes from organic solvents from industries
and factories is often considered as prime factor in air pollution. Green chemistry
deals with the replacement of organic solvents to novel substances such as ionic
liquids.
Ionic liquids have received considerable attention due to their unique properties in
applications such as catalysis, electrochemistry, synthesis and analytical chemistry,
and separation methods. They consist of organic cations and organic/ inorganic anions
with dispersed positive and negative charge along their backbones. Due to their
delocalized charge, anions and cations interact with each other through weak
Coulombic and van der Waals forces. The large size of the cations and their
asymmetry, prevent ions from close packing, thus they do not form crystals, but they
exhibit wide liquidus range, instead.
Their significant properties such as low melting point, undetectable vapor pressure,
low viscosity, high electrochemical window, no flammability and the ability of being
recycled are determined by the intermolecular forces equilibrium. The understanding
and the monitoring of these intermolecular interactions is of valuable importance in
order to predict or design properties by tailoring their structure.
In order to understand the effect of these forces to their properties, Protic Ionic
Liquids PILs HCnImNTf2(n=0-12), alkali molten salts ANTf2(A:Li-Cs) and composite
materials of protic ionic liquid HC1ImNTf2 encapsulated in porous material zeolite Z
FAU Y in several concentrations(PIL/Z 0.01, 0.02, 0.03, 0.05, 0.5 and 1).
The main interactions of protic ionic liquids are Coulombic interactions, van der
Waals forces and hydrogen bonding which occurs between the anion and the cation.
These ionic liquids were synthesized in our lab by mixing appropriate amounts of a
Brønsted base CnIm(n=0-12) and a Brønsted acid HNTf2. Their structure was studied
using vibrational spectroscopy FT-Raman and FT-IR/ATR as a function of
temperature, and differential scanning calorimetry(DSC). The quantification of their

2. interactions was calculated indirectly by using spectroscopic data and calculating the
Redused Isotropic spectra RISO(ω).
In order to understand the effect of the cation size into the Coulombic interactions,
alkali molten salt ANTf2(A:Li-Cs) were synthesized in our lab from their carbonate
salts Α2CO3 and the strong acid HNTf2 by a metathesis reaction. Their structure was
studied in both solid and liquid state, and as a function of temperature and the cation
size using UV-Raman and FT-IR/ATR spectroscopy
Finally, the structure of composite material IL/Z was studied as a function of PIL
loading. Samples were prepared in our lab, using FAU Y zeolite crystals and
HC1ImNTf2 ionic liquid. Composite material properties were studies using vibrational
spectroscopy FT-Raman, DSC and TGA measurements, X-Ray diffraction, N2
physisorption and AC impedance spectroscopy