Table 1. NICS(0)_iso and NICS(0)_zz (all units ppm) at the Centers of Porphyrin Nanorings in Their S₀ and T₁ States at the B3LYP/6-31G* Level of Theory.

	S0 ground state		T1 excited state
	iso	zz	iso	zz
c-P5	–2.5	–0.1	1.6	10.3
c-P6	–1.4	1.1	–5.4	–12.2
c-P7	–1.2	0.5	0.4	2.1
c-P8	–0.9	0.5	–1.3	–1.5