Putans, Becca A.; Bishop, Lee M.; Hamers, Robert J. published an article in Chemistry of Materials. The title of the article was 《Versatile Approach to Formation of Light-Harvesting Complexes on Nanostructured Metal Oxide Surfaces via “”On-Surface”” Assembly》.Electric Literature of C12H10Cl2N2 The author mentioned the following in the article:
A versatile, two-step “”on-surface”” assembly method is demonstrated to build heteroleptic light-harvesting complexes on nanostructured metal oxide surfaces. In this process, building-block ligands were first attached to SnO2 surfaces by grafting 2,2′-bipyridine mols. that were modified at the (4,4′) positions with surface-reactive binding groups. The surface-bound bipyridine ligands then served as a basis for “”on-surface”” assembly of complete surface-bound Ru(bpy)3 complexes by immersing the bipyridyl-modified samples in a solution containing the complex [Ru(bpy)2(CH3CN)2](PF6)2 and illuminating with UV light, which removes the photolabile acetonitrile ligands and allows the solution-phase complex to react with the surface-bound bipyridine mols. to form complete surface-bound Ru(bpy)3 complexes. We demonstrate that this process is effective using three different surface attachment schemes based on aryl-iodo, benzyl-iodo, and dithione bipyridine derivatives The stability of the complexes in water and the charge transfer characteristics were then measured for the different ligand attachment methods. The benzyl-iodo complex provides the best surface coverage and greatest stability. We also demonstrated that the building-block ligand can act as a site for regeneration of the complexes on the surface. The experimental process involved the reaction of 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Electric Literature of C12H10Cl2N2)
4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Electric Literature of C12H10Cl2N2The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.