Photophysical Properties of Pheophorbide-a Derivatives and Their Photodynamic Therapeutic Effects on a Tumor Cell Line In Vitro

Table 1

Photophysical parameters of the singlet excited state in degassed and air-saturated conditions.

Compound	(nm)	(ns)	(ns)		(10^6 s^−1)	(10^6 s^−1)	(10^6 s^−1)	(10^6 s^−1)
PA	677	9.0	7.9	0.26	111	33	4.4	77
PPE	677	9.2	7.8	0.26	109	33	3.2	77
PME	677	9.3	7.8	0.25	107	32	1.1	79
HPA	678	6.2	5.4	0.19	162	35	3.2	127
HPPE	678	6.7	5.8	0.18	149	31	3.0	119
HPME	678	6.4	5.6	0.20	156	37	1.5	123

Prime (′) and double prime (′′) stand for degassed and air-saturated conditions, respectively.