Fig. 2: One-dimensional organization of electron donors in the double-wall nanotube crystal.
From: Direct observation of electron transfer in solids through X-ray crystallography
a Photographs of double-wall nanotube crystals ([(Zn2+)4(LA)4(LA=O)4]n) before (left) and after soaking in solutions containing Fc (middle) and TTF (right). b Newly observed electron densities (Fo) found in the Fc- and TTF-soaked crystals alongside the total electron densities of Fc and TTF structures as revealed by density functional theory [B3LYP/6-31 G + (d,p); LANL2DZ (Fe)]. Color code: green (Fe), yellow (S), and black (C). c Electron density map (Fo) of (Zn2+)4(LA)4(LA=O)4 before (left) and after soaking with Fc (middle) and TTF (right). Red circles show newly observed electron densities. The electron density (Fo) due to OSO2CF3– anions is omitted for clarity. d–f X-ray crystal structures of d [(Zn2+)4(LA)4(LA=O)4]n, e [(Fc)2⊂(Zn2+)4(LA)4(LA=O)4]n, and f [(TTF)2⊂(Zn2+)4(LA)4(LA=O)4]n. One of the disordered structures is shown, and OSO2CF3– anions are omitted for clarity. Left figures: top views; right figures: side views.
