These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Tetranuclear copper(I) iodide complexes of chelating bis(1-benzyl-1H-1,2,3-triazole) ligands: structural characterization and solid state photoluminescence.
    Author: Manbeck GF, Brennessel WW, Evans CM, Eisenberg R.
    Journal: Inorg Chem; 2010 Mar 15; 49(6):2834-43. PubMed ID: 20158202.
    Abstract:
    A series of tetranuclear Cu(4)I(4)(L(n))(2) clusters (1-3) supported by the chelating 4,4'-(4,5-diX-1,2-phenylene)bis(1-benzyl-1H-1,2,3-triazole) ligands (L1, X = H; L2, X = CH(3); L3, X = F) have been prepared. Crystal structure determinations have shown that the clusters adopt a distorted "step-type" geometry in which the triazole ligands exhibit both chelating and bridging coordination modes to Cu(I) ions. When L3 was employed in a 3:2 CuI/L3 ratio, a crystalline product, 4, was obtained. Product 4 is actually a 1:1 cocrystallization of the tetranuclear cluster 3 (denoted 4a) and the dinuclear Cu(2)I(2)(L3)(2) complex (4b). X-ray structures of 1, 2, and 4 show the presence of close Cu...Cu contacts in the tetranuclear and dinuclear forms. (1)H NMR experiments indicate that rapid exchange occurs in these systems. All clusters are brightly luminescent in the solid state at 77 K and at room temperature with lambda(max) = 495-524 nm. Emission intensity decays fit a single exponential with lifetimes on the order of 10 to 35 microseconds at room temperature and 90 to 140 microseconds at 77 K. The origin of emission is tentatively assigned as a metal-to-ligand phenylene pi* charge transfer.
    [Abstract] [Full Text] [Related] [New Search]