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Abstract
Several viologen bis{tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate} salts were prepared by metathesis reaction of the corresponding viologen dibromides (diiodide) with sodium bis{tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate} salt in a polar organic solvent. They were characterized for their physical and thermal properties by experimental techniques including variable temperature X‐ray diffraction. All exhibited low T g and T m, and their T g/T m (K) ratios were in the range 0.66–0.79. Several exhibited polymorphism and formed isotropic ionic melts at <150°C. They were soluble in many common organic solvents such as ethers, alcohols, acetonitrile and methylene chloride. They exhibited photoluminescence in both 1,2‐dimethoxyethane and methanol, as well as in the solid state. In the solid state, the emission spectra exhibited hypsochromic shift when compared with those in solutions of 1,2‐dimethoxyethane and methanol.
§. This article is dedicated to Professor Robert W. Lenz with best wishes on the occasion of his 80th birthday.
Acknowledgements
P. K. B. acknowledges the University of Nevada Las Vegas (UNLV) for the initial Stimulation, Implementation, Transition and Enhancement (SITE), New Investigator Awards (NIA) and Planning Initiative Awards (PIA) grants; the Donors of the Petroleum Research Fund (PRF), administered by the American Chemical Society, and an award from Research Corporation for the support of this research. J. J. C. acknowledges the Graduate College at UNLV for the provision of a Summer Graduate Research Education And Training (GREAT) Assistantship for the support of this research. We also thank D. L. Walsh for her generous donation. Use of the Advanced Photon Source (APS) was supported by the U.S. Department of Energy, Basic Energy Sciences, and Office of Science, under Contract No. W‐31‐109‐Eng‐38. The Midwest Universities Collaborative Access Team (MUCAT) sector at the APS is supported by the U.S. Department of Energy, Basic Energy Sciences, and Office of Science, through the Ames Laboratory under Contract No. W‐7405‐Eng‐82.
Notes
§. This article is dedicated to Professor Robert W. Lenz with best wishes on the occasion of his 80th birthday.