The application of chiroptical spectroscopy (circular dichroism) in quantifying binding events in lanthanide directed synthesis of chiral luminescent self-assembly structures

• DOI: 10.1039/c4sc02474e
• Publication Date: 2014-10-10T16:02:07Z
• Authors: Oxana Kotova; Salvador Blasco; Brendan Twamley; John O'Brien; Robert D. Peacock; Jonathan A. Kitchen; Miguel Martínez-C...; Thorfinnur Gunnla...
• Keywords: Chirality

The binding of asymmetrical and optically pure tridentate ligands (L = 1(S) 1(R)) containing one carboxylic group 2-naphthyl as an antenna to lanthanide ions (M La(iii) Eu(iii)) was studied in CH3CN, showing the successive formation M:L, M:L2 M:L3 stoichiometric species solution. europium complexes EuL3 were also synthesised, structurally characterised their photophysical properties probed CH3OH CH3CN. changes chiroptical both 1(R) used (by circular dichroism (CD) spectroscopy) monitor these chiral self-assemblies While circularly polarised luminescence (CPL) showed Eu(1(S))3 Eu(1(R))3 enantiomers, with high dissymmetry factors (glum), fitting CD allowed for constants be determined that comparable those seen analyses absorbance changes.