79161-43-6Relevant academic research and scientific papers
Coordination chemistry of α-ω-bis(pyridylimine) ligands containing flexible linkers with copper(I)
Hu, Zhenzhong,Schneider, Celine M.,Price, Christina N.,Pye, Whitney M.,Dawe, Louise N.,Kerton, Francesca M.
, p. 1773 - 1782 (2012/05/20)
Copper(I) complexes of a series of six potentially tetradentate bis(pyridylimine) ligands were prepared, where the pyridylimine groups were separated by different linking units [in L1, CH2CH2CH 2(SiMe2O)20SiMe2CH 2CH2CH2; in L2, CH2CH 2CH2SiMe2OSiMe2CH2CH 2CH2; in L3, CH2CH2; in L4, CH 2(CH2)4CH2; in L5, CH 2(CH2)7CH2; in L6, CH 2CH2CH2OCH2CH2OCH 2CH2OCH2CH2CH2]. The solubilities of L1, L2 and [Cu(L2)](PF6) in supercritical carbon dioxide were determined. The coordination chemistry of L1-L2 with CuI was studied by UV/Vis, multinuclear NMR and IR spectroscopy, MALDI-TOF and ESI mass spectrometries and elemental analysis. These data suggested that [1+1] complexes had formed. Dicopper complexes of L3-L6 were prepared for comparison, and [Cu2(L5)2](PF6)2 characterized by single-crystal X-ray diffraction analysis. Close methylene C-H...π interactions are observed within the structure. PGSE NMR spectroscopy was used to determine the hydrodynamic radii of the species in solution and comparison of these data with computational models for the complexes was made. Freezing point depression measurements afforded molecular weights for solution-state species in agreement with the formulations proposed via NMR and mass spectrometric data. There is no evidence to support linear metallopolymer formation but data suggest that [2+2] and [1+1] metallomacrocyles were formed, with siloxane linking groups encouraging the formation of [1+1] species. Solid-state NMR spectroscopic data on [Cu(L1)](PF6) indicate the presence of two different environments for the PF6- anions.
Cap for copper(I) ions! metallosupramolecular solid and solution state structures on the basis of the dynamic tetrahedral [Cu(phenAr 2)(py)2]+ motif
Schmittel, Michael,He, Bice,Fan, Jian,Bats, Jan W.,Engeser, Marianne,Schlosser, Marc,Deiseroth, Hans-Joerg
, p. 8192 - 8200 (2009/12/08)
The tetrahedral [Cu(phenAr2)(py)2]+ coordination motif (phen = 1,10-phenanthroline; py = pyridine) conceived on the basis of the HETPYP concept (heteroleptic pyridyl and phenanthroline metal complexes) is a versatile dynam
