90609-47-5Relevant articles and documents
Chiral probe development for circularly polarised luminescence: Comparative study of structural factors determining the degree of induced CPL with four heptacoordinate europium(III) complexes
Neil, Emily R.,Fox, Mark A.,Pal, Robert,P?lsson, Lars-Olof,O'Sullivan, Benjamin A.,Parker, David
supporting information, p. 14937 - 14951 (2015/08/24)
A series of bright, europium(iii) complexes has been prepared based on an achiral heptadentate triazacyclononane ligand bearing two strongly absorbing, coordinated aralkynyl pyridyl moieties. The binding of chiral carboxylates, including α-hydroxy acids such as lactate and mandelate, has been monitored by emission spectroscopy and is signalled by the switching on of strong circularly polarised emission. In each case, an R-chiral carboxylate gave rise to emission typical of a Δ complex, most clearly shown in the form of the ΔJ = 4 transition manifold around 700 nm. Variations in the sign and magnitude of the CPL allow the enantiomeric purity and absolute configuration of the acid to be assessed in a sample. Analysis of the relative energies of the parent aqua complexes and their stereoisomeric adducts has been aided by lifetime measurements and density functional theory calculations.
Comparative analysis of conjugated alkynyl chromophore-triazacyclononane ligands for sensitized emission of europium and terbium
Soulie, Marine,Latzko, Frederic,Bourrier, Emmanuel,Placide, Virginie,Butler, Stephen J.,Pal, Robert,Walton, James W.,Baldeck, Patrice L.,Le guennic, Boris,Andraud, Chantal,Zwier, Jurriaan M.,Lamarque, Laurent,Parker, David,Maury, Olivier
supporting information, p. 8636 - 8646 (2014/07/21)
A series of europium and terbium complexes based on a functionalized triazacyclononane carboxylate or phosphinate macrocyclic ligand is described. The influence of the anionic group, that is, carboxylate, methylphosphinate, or phenylphosphinate, on the photophysical properties was studied and rationalized on the basis of DFT calculated structures. The nature, number, and position of electron-donating or electron-withdrawing aryl substituents were varied systematically within the same phenylethynyl scaffold in order to optimize the brightness of the corresponding europium complexes and investigate their two-photon absorption properties. Finally, the europium complexes were examined in cell-imaging applications, and selected terbium complexes were studied as potential oxygen sensors.
Modified o-methyl-substituted IBX: room temperature oxidation of alcohols and sulfides in common organic solvents
Moorthy, Jarugu Narasimha,Singhal, Nidhi,Senapati, Kalyan
, p. 80 - 84 (2008/09/17)
o-Methyl-substituted Me-IBX is the first modified analog of IBX that oxidizes alcohols in common organic solvents at room temperature, due to a composite of two factors, that is, low solubility and hypervalent twisting-promoted rate enhancement. Furthermore, the reagent is efficient for selective oxidation of sulfides to sulfoxides, a transformation that otherwise occurs only sluggishly with standard IBX. The facile synthetic accessibility and its mild as well as non-hazardous nature render Me-IBX a stable equivalent of Dess-Martin periodinane reagent in organic oxidations.