A Supramolecular Chemosensor for Aromatic Hydrocarbons

Assembly of Hydrophobic Shells and Shields around Lanthanides

“…This is an advantage for the photophysical studies, because it is well-known that charge-transfer bands present in most of the nitrogen or carboxylate donor sets quench lanthanide luminescence. [9] The excitation spectrum of [Dy(tpip) 3 ] (Figure 3), monitored at the 574 nm emission band ( 4 F 9/2 3 6 H 13/2 ), shows a structured band with peaks at 265 and 272 nm. This band closely resembles the absorption spectrum, which demonstrates that the Dy 3 emission is sensitised by an energytransfer process from the tpip ligand.…”

“…polypyridines, [1] benzimidazoles. [7] ™Remote∫ light-harvesting units have been successfully employed to sensitise Ln 3 luminescence, though this was restricted to more intricate macrocyclic structures [8,9] We chose aryl-substituted imidodiphosphinates [R 2 P(O)-NP(O)R 2 ] À (R Ph, tpip) as ligands that fit the requirements for our approach. Imidodiphosphinates can be viewed as inorganic analogues of b-diketonates, and it is well-known that the latter form luminescent lanthanide complexes.…”

“…X-ray crystal structure of [Eu(Metpip) 3 ] showing the atomic numbering scheme; selected bond lengths [ä: Eu1 ± O1 2.28(3), Eu1 ± O2 2.27(3), P1 ± O1 1.50(3), P2 ± O2 1.51(3), P1 ± N1 1.591(9), P2 ± N1 1.580(9).…”

Advances in Rare Earth Spectroscopy and Applications

“…In this case, two different ligands are used, one for the Ln ion (aza crown) and the other for the hydrocarbon (functionalized cyclodextrin). 159 Mortekkari et al 160 introduced a tri-anionic diethylenetriaminepentaacetate to the Tb-cyclodextrin complex to improve the strength of aromatic hydrocarbon binding and reported effective sensitivity of such complex towards hydrocarbon. The detection of protease inhibitors is very important due to its application in curing different diseases (cancer, AIDS, inflammatory disorders, etc.).…”

Synthesis, Spectroscopic, and Biological Studies of Chromium(III), Manganese(II), Iron(III), Cobalt(II), Nickel(II), Copper(II), Ruthenium(III), and Zirconyl(II) Complexes of N1,N2-Bis(3-((3-hydroxynaphthalen-2-yl)methylene-amino)propyl)phthalamide

“…6 Polyamino carboxylate groups had been used for the design of polydentate ligands such as ethylenediamine tetraacetic acid and diethylenetriamine penta acetic acid, generally showed high affinity for metal cations. 7 These ligands were widely used as chelating agents in fundamental research 8 or as diagnostic tools in the pharmaceutical industry 9 and they are particularly suitable for magnetic resonance imaging (MRI).…”