UV/Vis Spectroscopic Evaluation of 4-Nitropyridine N-Oxide as a Solvatochromic Indicator for the Hydrogen-Bond Donor Ability of Solvents.
The potential of 4-nitropyridine N-oxide to act as a solvatochromic indicator of the hydrogen-bond donor ability of solvents has been evaluated. A linear free-energy relationship has been established that is predominantly dependent on the Kamlet-Taft alpha parameter of the solvent. In comparison to the previously reported results obtained for pyridine N-oxide, 4-nitropyridine N-oxide possesses a solvatochromic effect that is located in the long wavelength ultraviolet region (lambda = 330-355 nm) of the spectrum, making it a viable probe for hydrogen-bond donation assessment.
Lagalante
Anthony F.
AF
National Institute of Standards and Technology, Chemical Sciences and Technology Laboratory, Physical and Chemical Properties Division, 325 Broadway, Boulder, Colorado 80303.
Jacobson
Ryan J.
RJ
Bruno
Thomas J.
TJ