Modification of spectral properties of the PAH cations upon cluster formation

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Volume 711 (July 2026)

A&A, 711 (2026) A171

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Table 1

Experimental positions of the most prominent IR absorption bands of PAH cations.

Cation	λ(μm)
${Np}_{2}^{+}$ $Mathematical equation: ${\rm{Np}}_2^ + $$	2.665	2.715	2.940	3.055
	3.200	3.250	3.275	3.295
${Np}_{3}^{+}$ $Mathematical equation: ${\rm{Np}}_3^ + $$	2.900	3.250	3.270	3.305
An⁺	7.070	7.120	7.250	7.340
	7.430	7.490	8.420
${An}_{2}^{+}$ $Mathematical equation: ${\rm{An}}_2^ + $$	2.690	3.120	3.150	3.175
	3.270	3.295	3.450	3.635
	3.720	3.940	3.970	4.170
	6.490	6.735	7.215	7.330
	7.400	7.470	7.580	8.070
	8.220	8.700	8.990
${An}_{3}^{+}$ $Mathematical equation: ${\rm{An}}_3^ + $$	2.695	3.280	3.295	3.450
	3.635	3.70	4.020	4.175
	6.490	6.730	7.280	7.390
	7.580	8.060	8.630	8.710
HBC⁺	2.840	3.155	3.230	3.350
	3.395	3.465	3.485	3.565
	3.620	3750
	6.020	6.360	7.10	7.770
	8.310	9.380
${HBC}_{2}^{+}$ $Mathematical equation: ${\rm{HBC}}_2^ + $$	3.230	6.350

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