Ionic liquids are a special class of salts with low melting points that can be used in place of volatile organic solvents. Notably, ionic liquids are non-volatile and therefore do not escape into the environment by evaporation. Moreover, vast numbers of ionic liquids can be prepared, and designed with specific applications in mind, and there has been considerable interesting in developing new ionic liquids especially by modifying the ionic liquid cation. In this project we focus our attention on ionic liquid anions and explores the use of new ionic liquids containing new types of anions in various applications including catalysis, in solar cells, and in materials chemistry. Our aim is to design new anions which have specific properties and functions and therefore can potentially enhance the performance of ionic liquids in certain applications.