Theoretical and experimental O₂ capacities, IAST O₂/N₂ selectivities, reported binding enthalpies, and reported O–O infrared stretching frequencies for selected metal–organic frameworks, organized from highest to lowest binding enthalpy.

MOF	Theoretical O2 capacitya		Experimental uptake at 1 barb			IAST/T (K)	−ΔHO2 (kJ mol−1)	O–Oc (cm−1)	Ref.
	mmol g−1	wt (%)	mmol g−1	wt%	T (K)
Cr-BTT	3.94	11.2	2.57	7.59	298	2570/298	65	1193	123
Cr3(btc)2	6.43	17.1	3.9	11	298			1129	42
CuI-MFU-4l	1.69	5.13	2.33	6.94	233		53		46
Fe-BTTri	3.91	11.1	5.90	15.9	195	27/195	51	1199	45
Mn-PCN-224	0.73	2.3	0.86	2.7	298		49.6(8)	984	47
Co2(OH)2(bbta)	6.45	17.1	7.57	19.5	195	42/195	49(2)	1151	88
Co-BDTriP	3.87	11.0	4.8	13	195	105/195	47(1)		44
Fe2(dobdc)	6.54	17.3	8.16	20.7	211	8/214	41	1129	43
Co-BTTri	3.86	11.0	4.8	13	195	41/195	34(1)		44
Fe-PCN-224	0.73	2.3	0.26	0.83	298		34(4)		129
Co-PCN-224	0.73	2.3	2.00	6.02	195		15.2(6)		130

^aCalculated based on gravimetric density of open metal sites.

^bFor Cr-BTT, Cr₃(btc)₂, and Fe₂(dobdc), reported uptakes in wt% were converted to mmol g⁻¹; all other framework capacities were reported in mmol g⁻¹ and converted to wt%.

^cStretching frequencies reported at temperatures associated with reversible O₂ binding.