Synthesis, Optical, Electrochemical and Theoretical Studies of New Multicyclic Substituted Phthalocyanines.

Here novel phenanthrenoxy and pyrenoxy substituted phthalocyanines were synthesized and fully characterized by general spectroscopic methods such as elemental analysis, 1H NMR, MALDI-TOF, FT-IR, UV-Visible absorption. The aggregation property of these phthalocyanines was investigated in CHCl3 and Triton X. Furthermore, electrochemical and DFT calculations were performed for these molecules.

Characterization of sulfonated poly(ether ether ketone)/silane nanocomposite membrane for high temperature polymer electrolyte membrane fuel cells.

The perfluorosulfonic acid polymer membrane is most widely used in PEMFCs. However, its some major drawbacks like high cost and performance limitation at high temperature are obstacles of its commercialization. The goal of this study was to develop low cost membranes which have good conductivity in the range of PEMFCs operating temperature.

Poly(dimethyl siloxane) membrane for high temperature proton exchange membrane fuel cells.

Sulfonic acid-based membrane gives the relatively high conductivity only in the presence of water, but phosphoric acid presents the relatively high proton conductivity without water because of its self dissociation natures to develop high temperature PEMFCs. We synthesized the thermostable material that has phosphorous groups based on poly(dimethyl siloxane) (PDMS). PDMS, which is intrinsically hydrophobic was modified to be amphiphilic by substituting end groups with hydrophilic phosphorous groups.