Water-Soluble Fullerenol with Hydroxyl Group Dependence for Efficient Two-Photon Excited Photodynamic Inactivation of Infectious Microbes

Table 1 Two-photon action cross sections of fluorescein (in 0.1 M NaOH, pH 11) and rhodamine B (in methanol). Excitation wavelength, 760 nm

	Fluorescein (in ddH₂O, pH = 11)	Rhodamine B (in methanol)
Excitation wavelength at 760 nm action cross section, ησ₂ (GM, 10⁻⁵⁰cm⁴s/photon)	36.5	66.1