Composition triggered Aggregation/Solubilization behaviour of mixed counter charged gemini Surfactants: A Multi-technique investigations

•Fluorescence parameters can be used to detect the interaction between counter charged geminis.•Composition variation modulates the apparent dielectric constant of the mixed micelle.•Mixing can tune micelles of different architectures which further depend on spacer nature.•Zeta (ζ) values show charge reversal during composition variation.•A correlation has been proposed for the dependence of MSR on the micellar environment- morphology- composition.