Ground and excited state chiroptical properties of enantiopure macrocyclic tetranaphthyl lanthanide complexes: Controlled modulation of the frequency and polarisation of emitted light
Document Type
Article
Publication Date
1-1-1998
Abstract
Circular dichroism spectroscopy has revealed that strong exciton coupling occurs between adjacent pairs of 1-naphthyl chromophores in the chiral sodium, calcium and europium complexes of the macrocyclic tetraamide L1a/b. In constitutionally isomeric complexes involving a 2-naphthyl linkage, L2a/b, intramolecular excimer formation is observed by fluorescence emission spectroscopy as being strongest in the protonated ligand itself. The terbium and europium complexes show a well-defined circularly polarised luminescence that is independent of the nature of excitation: UV excitation at 300 nm via the proximate naphthyl antennae in [Tb.L1a]3+ and [Tb.L1b]3+ followed by intramolecular energy transfer results in mirror-image circularly polarised emission spectra. The lanthanide complex serves to modulate both the frequency and polarisation of the incident light in a controlled manner.
Publication Title
New Journal of Chemistry
Recommended Citation
Dickens, R.,
Howard, J.,
Maupin, C.,
Moloney, J.,
Parker, D.,
Peacock, R.,
Riehl, J.,
&
Siligardi, G.
(1998).
Ground and excited state chiroptical properties of enantiopure macrocyclic tetranaphthyl lanthanide complexes: Controlled modulation of the frequency and polarisation of emitted light.
New Journal of Chemistry,
22(8), 891-899.
http://doi.org/10.1039/a801004h
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/8474