Figure 2: UV-Vis diffuse-reflectance spectra of NOF powders and their ligands.
From: Localized cell stimulation by nitric oxide using a photoactive porous coordination polymer platform
(a) The characteristic absorption band assigned to the transition located on the nitro functionality in 2nIm remains unaffected upon the coordination of Zn(II) in NOF-1. As anticipated, [Co(2nIm)2]n gives rise to additional absorption bands in the visible region, which are characteristic of Co(II) in a tetrahedral coordination environment. (b) A bathochromic shift in the absorption band is observed in NOF-2, on the coordination of zinc, which suggests enhanced π-conjugation in the nitroaromatic ligand.
