Solvatochromism of a Novel Betaine Dye Derived from Purine

摘要: A novel solvatochromic betaine dye has been synthesized from xanthosine and characterized spectroscopically by UV−vis in a broad range of solvents. The 9-(2‘,3‘,5‘-tri-O-acetyl-β-d-ribofuranosyl)-2-(pyridinium-1-yl)-9H-purin-6-olate, 1a, exhibits solvent-induced spectral band shifts that are 2/3 as large the known Reichardt's dye, which forms basis ET(30) solvent polarity scale. Moreover, 1a is ribonucleoside hence potential application probe for RNA oligonucleotides. isomeric 6-(pyridinium-1)-yl-9H-purin-2-olate, 2a, also slightly smaller shifts. new dyes have studied comparing experimental calculated based on calculation UV/vis absorption spectra, using combination methods with density functional theory (DFT). COSMO continuum dielectric method, an applied electric field term ...