Synthesis, Solvatochromism, and Molecular Structure of a New Pyridinium N+N− Betaine Dye

✍ Scribed by Milart, Piotr ;Stadnicka, Katarzyna

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 476 KB
• Volume: 1997
• Category: Article
• ISSN: 0947-3440
• DOI: 10.1002/jlac.199719971228

✦ Synopsis

Abstract

Two methods for the synthesis of N‐[4‐(2,4,6‐triphenyl‐1‐pyridinio)phenyl]‐p‐toluenesulfonaminide (4), a new betaine dye with positive and negative charges at two nitrogen atoms separated by an aromatic ring, are described. 4 displays a negative solvatochromic effect slightly smaller than that observed for the standard betaine 1 [E~T~(30) scale]. X‐ray structure determination of crystals containing 4 and acetone solvate molecules in the molar ratio of 1:1 revealed that the geometry of the pyridinium moiety is strongly influenced by the negatively charged aminide nitrogen atom.