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PyridiniumN-Phenoxide Betaines and Their Application to the Characterization of Solvent Polarities, XIX. The Halochromism of PyridiniumN-Phenoxide Betaine Dyes in Acetonitrile Solution

✍ Scribed by Reichardt, Christian ;Asharin-;Fard, Siamak ;Schäfer, Gerhard


Publisher
Wiley (John Wiley & Sons)
Year
1993
Tongue
English
Weight
558 KB
Volume
126
Category
Article
ISSN
0009-2940

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PyridiniumN-Phenoxide Betaines and Their
✍ Eberhardt, Runar ;Löbbecke, Stefan ;Neidhart, Bernd ;Reichardt, Christian 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 524 KB

## Abstract By means of the negative solvatochromic betaine dyes 1a, b, the UV/Vis‐spectroscopically derived empirical solvent polarity parameter __E__~T~(30) for supercritical carbon dioxide (sc‐CO~2~) was determined in the temperature and pressure ranges 40–80°C and 150–550 bar, respectively.

PyridiniumN-phenoxide betaines and their
✍ Reichardt, Christian ;Schäfer, Gerhard 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 411 KB

## Abstract By means of the negative solvatochromic betaine dyes 1a and 1b empirical solvent polarity parameters __E__~T~(30) for 40 organic solvents of current interest were newly determined or corrected (Table 1).