Photosensitization of Colloidal SnO₂ Semiconductor Nanoparticles with Xanthene Dyes

Table 2

Photophysical properties of xanthene dyes.

S. no.	Dyes	𝐸(𝑠) (eV)^a	𝐸𝑠/𝑠+ (V)^b	𝐸𝑠∗/𝑠+ (V)^c	Δ𝐺et (eV)^d
1	Fluorescein	2.41	1.30	−1.11	−1.11
2	Eosin	2.31	1.10	−1.21	−1.21
3	Erythrosine B	2.17	0.95	−1.32	−1.22

aExcited state energy of the dyes.
^bThe oxidation potentials of the ground state dyes in water versus NHE.
^cCalculated from the equation, 𝐸_{𝑠∗/𝑠+}=𝐸_𝑠/𝑠+−𝐸_𝑠, where 𝐸_{𝑠∗/𝑠+} is the oxidation potential of the excited state dyes.
^dCalculated from the Rehm-Weller equation.