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. Author manuscript; available in PMC: 2011 Sep 20.
Published in final edited form as: Inorg Chem. 2010 Sep 20;49(18):8208–8221. doi: 10.1021/ic902595c

Table 2.

Wavelengths of maximum absorbance and molar absorptivities for Fe-HOPO complexes in aqueous solution.a

Complex N3(etLH)3 N2(etLH)2 N2(prLH)2 3-hydroxy-
2(1H)pyridinoneb
Mono-coordinated N/A ~600c ~600c 600
Bis-coordinated 546
(2650±20)		 547
(3580±20)		 545
(3650±50)		 548
(3690)
413
(1760±40)		 419
(2400±100)		 417
(2300±200)		 415
(1880)
Tris-coordinated 507
(3820±10)		 508
d 		503
(4910±20)		 502
(5160)
417
(3320±10)		 418
d 		418
(4000±20)		 417
(4080)
a)

Molar absorptivity values (in dm3 mol−1 cm−1) from an average of four measurements are shown below the wavelength in parentheses.

b)

Reference 14.

c)

Values were measured at high dilution and may be inaccurate.

d)

Values were not determined due to low solubility of complex at higher pH.