Table 4.

Isosbestic point of the PZ-CPZ mixtures before and after photolysis, number of independent reactions (S), kinetic constant (k), percentage of photo-conversion of CPZ and formation of PZ, and quantum yield (φ) for the production of PZ and destruction of CPZ.

Solvent	Isosb. Point (nm)		S	k (mM/s) × 10⁵		%		φ

	Before	After		PZ	CPZ	CPZ	PZ	PZ	CPZ
MeOH	306	298–302^†	2	7.0	1.62	82	37	0.39 ± 0.01	0.93 ± 0.03^‡
EtOH	315	306^§	1^¶	12.0	16.3	89	66	1.02 ± 0.06	1.15 ± 0.05^□
1-PrOH	304	303	1	13.4	16.1	84	83	0.85 ± 0.05	1.01 ± 0.06
2-PrOH	312	306	1	16.4	16.4	91	89	1.1 ± 0.1	0.99 ± 0.04^¤
t-BuOH	312	--	2	--	11.0	62	0	--	0.75 ± 0.03

^†

Formation of a well-defined isosbestic point was not observed. For CMPPH 3b the isosbestic point is observed at 309 nm.

^‡

For CMPPH 3b, φ= 0.88 ± 0.07.

^§

For CMPPH 3b, the isosbestic point is observed at 308 nm.

^¶

A value of 2 is obtained for long irradiation times.

^□

For CMPPH 3b, φ= 1.01 ± 0.02.

^¤

φ = 0.12 [Reference (5)].