Table 1. ZFS Parameters and Relative Zero-Field Sublevel Populations for P1 and Linear Oligomers P2–P6 Determined through Simulation of the Transient EPR Spectra Shown in Figure 2.

	|D| [MHz]	|E| [MHz]	pX:pY:pZa
P1	898 ± 5	161 ± 2	0.05:0.00:0.95
P2	1117 ± 9	284 ± 2	0.90:0.00:0.10
P3	1169 ± 7	269 ± 2	0.53:0.00:0.47
P4	1195 ± 8	273 ± 2	0.47:0.00:0.53
P5	1201 ± 8	254 ± 2	0.24:0.00:0.76
P6	1199 ± 9	260 ± 3	0.26:0.00:0.74

^aThe error on the relative sublevel populations is approximately 0.02.