Thermodynamic parameters for the adsorption of acridinium derivatives (compound 1 (ClO₄⁻ and Cl⁻) and compound 2 (ClO₄⁻ and Cl⁻)) on SSA.

Compound	Counterion	ΔG/kJ mol−1					ΔH/kJ mol−1	ΔS/kJ mol−1 K−1	−TΔS/kJ mol−1
		293 K	298 K	303 K	308 K	313 K			298 K
1	ClO4−	−33.6	−33.8	−34.5	−34.7	−35.4	−7.82	0.088	−25.9
1	Cl−	−34.5	−34.8	−35.3	−35.7	−36.0	−11.3	0.079	−23.5
2	ClO4−	−35.6	−36.0	−36.3	−36.5	−36.9	−16.7	0.064	−18.8
2	Cl−	−36.7	−36.6	−37.0	−36.9	−37.6	−24.6	0.041	−12.0