Nierengarten, Jean-Francois; Nierengarten, Iwona; Holler, Michel; Sournia-Saquet, Alix; Delavaux-Nicot, Beatrice; Leoni, Enrico; Monti, Filippo; Armaroli, Nicola published the article 《Dinuclear Copper(I) Complexes Combining Bis(diphenylphosphanyl)acetylene with 1,10-Phenanthroline Ligands》. Keywords: crystal structure copper acetylenediphosphine phenanthroline derivative dinuclear; copper acetylenediphosphine phenanthroline derivative preparation electrochem photophys property.They researched the compound: Copper(I) tetra(acetonitrile) tetrafluoroborate( cas:15418-29-8 ).Quality Control of Copper(I) tetra(acetonitrile) tetrafluoroborate. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:15418-29-8) here.
Dinuclear Cu(I) complexes were prepared starting from bis(diphenylphosphanyl)acetylene (dppa), [Cu(MeCN)4](BF4) and various 1,10-phenanthroline ligands (NN), 1,10-phenanthroline (phen), neocuproine (dmp), bathophenanthroline (Bphen), bathocuproine (Bdmp) and 2-phenyl-1,10-phenanthroline (mpp). The resulting [Cu2(μ-dppa)2(NN)2](BF4)2 complexes were thus obtained in excellent yields (88 to 94 %). X-ray crystal structure anal. of four complexes revealed that the 10-membered dimetallacycle adopts a chair-like conformation in the solid state. Detailed variable temperature NMR studies have evidenced dynamic coordination/decoordination of the NN ligands as well as ligand exchange reactions. At high temperature (100°), entropic effects tend to destabilize the dinuclear heteroleptic complexes. As a result, homoleptic mononuclear complexes, i.e. [Cu(NN)2]+ and undefined dppa Cu(I) complexes, start to appear in solution In contrast, the heteroleptic coordination scenario is almost exclusively favored at lower temperatures For most of the dinuclear complexes, the 10-membered dimetallacycle remains flexible and chair-to-chair interconversion occurs faster than the NMR timescale even at -70°. In the particular case of the mpp derivative, the bulky Ph substituent prevents the isomerization of the metallacycle and thus contributes to rigidify the structure. This rigidification has a dramatic effect on the emission properties of this particular compound The emission quantum yield of [Cu2(μ-dppa)2(mpp)2](BF4)2 is effectively one order of magnitude higher when compared to all the other complexes in this series (20% vs. 0.3-1.7% in the solid state).
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