Physical Sciences and Mathematics Commons^™

Synthesis, Optical Spectroscopy And Laser Potential Of Pyrylium Tosylates, Jung Jae Koh, Christina Inbok Lee, Mihaela Alexa Ciulei, Haesook Han, Pradip Kumar Bhowmik, Vladimir Kartazaev, Swapan Kumar Gayen

Chemistry and Biochemistry Faculty Research

Safe and inexpensive methods for synthesis of a series of four substituted 2,4,6-triphenylyrylium tosylate salts with different substituents are reported. The synthesis methods use p-toluenesulfonic acid monohydrate instead of conventional acid catalysts including perchloric acid or boron trifluoride diethyl etherate that pose explosion danger and difficult storage problems, respectively. The chemical structures of these salts were established using FTIR, 1H and 13C NMR spectroscopic techniques and elemental analysis. Thermogravimetric analysis (TGA) showed that these salts have good thermal stability, and differential scanning calorimetry (DSC) analysis showed that they have lower melting transitions than the corresponding tetrafluoroborate and perchlorate salts. Solutions …