1248386-96-0Relevant articles and documents
Post-assembly functionalization of organoplatinum(II) metallacycles via copper-free click chemistry
Chakrabarty, Rajesh,Stang, Peter J.
, p. 14738 - 14741 (2012/11/06)
We describe the use of a strain-promoted copper-free click reaction in the post-self-assembly functionalization of organoplatinum(II) metallacycles. The coordination-driven self-assembly of a 120° cyclooctyne-tethered dipyridyl donor with 60° and 120° di-Pt(II) acceptors forms molecular rhomboids and hexagons bearing cyclooctynes. These species undergo post-self-assembly [3+2] Huisgen cycloaddition with a variety of azides to give functionalized ensembles under mild conditions.
Photophysical and computational investigations of bis(phosphine) organoplatinum(II) metallacycles
Pollock, J. Bryant,Cook, Timothy R.,Stang, Peter J.
, p. 10607 - 10620 (2012/08/08)
A series of endohedral and exohedral amine-functionalized ligands were synthesized and used in the construction of supramolecular D2h rhomboids and a D6h hexagon. These supramolecular polygons were obtained via self-assembly of 120° dipyridyl donors with 180° or 120° diplatinum precursors when combined in 1:1 ratios. Steady-state absorption and emission spectra were collected for each ligand and metallacycle. Density functional theory (DFT) and time-dependent DFT calculations were employed to probe the nature of the observed optical transitions for the rhomboids. The emissive properties of these bis(phosphine) organoplatinum metallacycles arise from ligand-centered transitions involving π-type molecular orbitals with modest contributions from metal-based atomic orbitals. The D2h rhomboid self-assembled from 2,6-bis(4-pyridylethynyl)aniline and a 60° organoplatinum(II) acceptor has a low-energy excited state in the visible region and emits above 500 nm, properties which greatly differ from those of the parent 2,6-bis(4-pyridylethynyl)aniline ligand.
