Abstract
AbstractSynthesis of water‐soluble‐substituted pyridinium cation which is attached with base sensitive fluorophore peripheral units with different inorganic counter anions under conventional/silica‐supported Muffle furnace methods. Solvent‐free synthetic approach has more merits than the conventional method, such as non‐toxic, shorter reaction time, easy workup procedure without purification process, and higher yields. Ultraviolet–visible spectra were recorded in neutral, acidic, and alkaline medium; it showed greater red shift in alkaline medium compared with neutral and acidic pH medium.
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