66228-76-0Relevant articles and documents
A Rotaxane-like Cage-in-Ring Structural Motif for a Metallosupramolecular Pd6L12 Aggregate
K?seborn, Matthias,Holstein, Julian J.,Clever, Guido H.,Lützen, Arne
supporting information, p. 12171 - 12175 (2018/09/11)
A BODIPY-based bis(3-pyridyl) ligand undergoes self-assembly upon coordination to tetravalent palladium(II) cations to form a Pd6L12 metallosupramolecular assembly with an unprecedented structural motif that resembles a rotaxane-like cage-in-ring arrangement. In this assembly the ligand adopts two different conformations—a C-shaped one to form a Pd2L4 cage which is located in the center of a Pd4L8 ring consisting of ligands in a W-shaped conformation. This assembly is not mechanically interlocked in the sense of catenation but it is stabilized only by attractive π-stacking between the peripheral BODIPY chromophores and the ligands’ skeleton as well as attractive van der Waals interactions between the long alkoxy chains. As a result, the co-arrangement of the two components leads to a very efficient space filling. The overall structure can be described as a rotaxane-like assembly with a metallosupramolecular cage forming the axle in a metallosupramolecular ring. This unique structural motif could be characterized via ESI mass spectrometry, NMR spectroscopy, and X-ray crystallography.
One-pot transformation of Me3Si-/Ph2P(O)-protected ethynes to unsymmetrical arylethynes
Peng, Li-Fen,Lei, Jia-Ying,Wu, Li,Tang, Zi-Long,Luo, Zhi-Peng,Jiao, Yin-Chun,Xu, Xin-Hua
, p. 271 - 273 (2018/06/26)
Me3Si-/Ph2P(O)-protected ethynes were successfully transformed to unsymmetrical arylethynes via a one-pot Ph2P(O)-deprotection/ [Pd(dppf)Cl2]-catalysed coupling and one-pot Me3Si-deprotection/Sonogash
Photophysical Properties of Oligo(phenylene ethynylene) Iridium(III) Complexes Functionalized with Metal-Anchoring Groups
Ponce, Julia,Aragó, Juan,Vayá, Ignacio,Magenti, Jorge Gómez,Tatay, Sergio,Ortí, Enrique,Coronado, Eugenio
supporting information, p. 1851 - 1859 (2016/05/02)
The electrochemical and photophysical properties of a family of conjugated ligands and their iridium(III) cyclometallated complexes are described. They consist of a series of monocationic IrIII bis-2-phenylpyridine complexes with p-phenylethynyl-1,10-phenanthroline ligands of different length. The structure of these ligands includes terminal acetylthiol or pyridine groups, which can provide good electrical contacts between metal electrodes. Cyclic voltammetry, absorption and emission spectroscopy, laser flash photolysis and density functional theory calculations reveal that the high conjugation of the diimine ligand affords small energy gaps between the frontier orbitals. Nevertheless, the nature of the terminal substituents and the extent of the conjugation in the diimine ligand have little influence on the photophysical features at room temperature. The spectroscopic data and theoretical calculations agree that the charge-transfer nature of the emitting excited state is maintained along the series at room temperature, whereas in rigid matrices ligand-centred states also contribute to the low-temperature emission. The good conducting features of the diimine ligands, the small dependence of the HOMO-LUMO (HOMO = highest occupied molecular orbital, LUMO = lowest unoccupied molecular orbital) gaps of these complexes on the ligands and the charge-transfer nature of the emitting excited state make these complexes promising test beds for the study of photoconducting phenomena in molecular junctions.
