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Chiral luminescent lanthanide complexes possessing strong (samarium, Sm) circularly polarised luminescence (CPL), and their self-assembly into Langmuir-Blodgett films.

Author(s) Barry, D.E.; Kitchen, J.A.; Mercs, L.; Peacock, R.D.; Albrecht, M.; Gunnlaugsson, T.
Journal Dalton Trans
Date Published 2019 Aug 14
Abstract

The lanthanide directed self-assembly of chiral amphiphilic 2,6-pyridinedicarboxylic acid based ligands 1 and 2 with various Ln(CFSO) (Ln = Tb, Sm, Lu, Dy) salts was studied in CHCN and evaluated with the expected 1 : 3 and 1 : 1 Ln : Ligand species forming in solution. Ligand chirality was retained and transferred, as depicted by circular dichroism (CD) and circularly polarised luminescence (CPL) measurements (for Tb and Sm), to the lanthanide centre upon complexation with high dissymmetry factor values for the Sm complexes obtained (g = -0.44 and 0.29 and 0.45 and -0.23 for the G→H and the G→H transitions of Sm·1 and Sm·2, respectively). The ability of the complexes to form stable Langmuir monolayers at the air-water interface was also established while Langmuir-Blodgett films of Tb·L and Sm·L exhibited lanthanide luminescent emission.

DOI 10.1039/c9dt02003a
ISSN 1477-9234
Citation Barry DE, Kitchen JA, Mercs L, Peacock RD, Albrecht M, Gunnlaugsson T. Chiral luminescent lanthanide complexes possessing strong (samarium, Sm) circularly polarised luminescence (CPL), and their self-assembly into Langmuir-Blodgett films. Dalton Trans. 2019;48(30):11317-11325.

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