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.
Linear bilateral extended 2,2′:6′,2′′-terpyridine ligands, their coordination complexes and heterometallic supramolecular networks
Veliks, Janis,Tseng, Jui-Chang,Arias, Karla I.,Weisshar, Florian,Linden, Anthony,Siegel, Jay S.
, p. 4317 - 4327 (2015/01/08)
Octahedral metal complexes of tridentate 2,2′:6′,2′′-terpyridine (terpy) fused with five-membered furan rings mimic the topology of tetrahedral metal complexes of bidentate 5,5′-functionalized 2,2′-bipyridine (bipy). Herein, we report the robust synthesis of 2,6-bis(2-substituted-furo[2,3-c]pyridine-5-yl)pyridine based ligands to access a series of linear bilateral extended terpy derivatives. This molecular design of alternating five- and six-membered rings has been applied to extend the applicability of terpy as a building block in supramolecular chemistry. The complexation of 2,6-bis(2-substituted-furo[2,3-c]pyridine-5-yl)pyridine derivatives with metal ions preferring octahedral geometry (Fe2+, Ru2+, and Zn2+) gives molecular "crossings" and "corners". Such design elements, functionalized with 4-pyridyl groups, allowed the construction of 3D and 2D heterometallic supramolecular networks containing Fe2+, Ag+or Fe2+, Cu+metal centers.
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.