TABLE 1.

Molar absorptivities of porphyrin derivatives

Ligand Derivative	T4 λmax (nm)	ɛλ (× 10−5 M−1cm−1)	TPPS λmax (nm)	ɛλ (× 10−5 M−1cm−1)
Cu(II)	425	2.31	412	4.16
Ni(II)	420	1.49	409	∼2
Fe(III)	401	1.02	394	1.52
Mn(III)	462	0.92	467	0.95
Co(III)	434	2.14	425	2.38
Au(III)	404	2.82	405	4.37

T4, tetrakis(N-methylpyridinium-4-yl)porphine; TPPS, tetrakis(4-sulfonatophenyl)porphine). (Table references (39–47)).