701901-03-3Relevant academic research and scientific papers
8-Amino-5-ethyl-3-oxido-6-phenylphenanthridinium Betaine, a New Solvatochromic Compound
Finkentey, Johann-Henrich,Zimmermann, Herbert W.
, p. 1 - 6 (2007/10/02)
Synthesis and some properties of 8-amino-5-ethyl-3-oxido-6-phenylphenanthridinium betaine (3) are described.The structure is proved by 1H-NMR and mass spectroscopy.In aqueous solutions 3 is in a pH dependent equilibrium with its conjugated aminophenol 2 and the twice protonated dication 4.The pKa value of the prototropic equilibrium between 3 and 2 at 25 deg C is 7.15.The betaine shows a strong negative solvent effect.Solutions of 3 in aprotoic solvents are blue, in amphiprotonic solvents red to purple.
