Table 5. Oxidation States, White Line Energies, Normalized Maximal Absorption, and Normalized Peak Ratios between the Normalized Maximum of the White Line (a) and the Post-edge Minimum (b) of Cisplatin, K₂PtCl₄, K₂PtCl₆, Pt1 Solid Pellets, and Platinum Metal^a.

compound	oxidation state	white line (eV)	peak maximum (a)	post-edge minimum (b)	normalized peak ratio (a/b)
Cisplatin	2+	11571.2	1.300 ± 0.001	0.8673 ± 0.0002	1.499 ± 0.002
K2PtCl4	2+	11570.7	1.226 ± 0.003	0.893 ± 0.003	1.372 ± 0.008
K2PtCl6	4+	11571.9	1.898 ± 0.003	0.859 ± 0.002	2.21 ± 0.01
Pt(NH3)2Cl4	4+	11572.3	2.237 ± 0.007	0.799 ± 0.006	2.80 ± 0.02
Pt1	4+	11573.4	1.861 ± 0.004	0.8198 ± 0.0004	2.270 ± 0.005
Pt metal	0	11570.6	1.271 ± 0.004	0.946 ± 0.009	1.34 ± 0.01
In-cell Pt1b,d	unknown	11572.7	1.60 ± 0.02	0.96 ± 0.02	1.68 ± 0.02
In-cell Pt1c,d	unknown	11572.9	1.65 ± 0.02	0.95 ± 0.02	1.74 ± 0.03

^aIn addition, two independent 5 × 5 μm² Pt-containing regions in cells treated with independent 5× photoIC₅₀ (275 μM) Pt1 and irradiation were analyzed using traditional energy-scanning and compressed-sensing for method validation of the latter.

^bEnergy-scanning.

^cCompressed-sensing.

^d5 × 5 μm² Pt-containing regions of interest in cryopreserved, freeze-dried PC3 cells treated with Pt1 under photoconditions (1 h + 1 h 465 nm, 17 J/cm²)