Issue 16, 2023

Intense 1400–1600 nm circularly polarised luminescence from homo- and heteroleptic chiral erbium complexes

Abstract

Efficient near-infrared circularly polarised luminescence (CPL) between 1400 and 1600 nm of four enantiomer pairs of homo- and heteroleptic complexes has been successfully measured. Utilising inexpensive optics and a commercial fluorimeter, discrimination of the left and right circularly polarised components was achieved, yielding remarkably high dissymmetry values in emission (glum). Most notably, homoleptic complexes CsEr(hfbc)4 (hfbc = 3-heptafluorobutylyrylcamphorate) and [TMG−H+]3Er(BINOLate)3 (TMG = 1,1,3,3-tetramethylguanidine; BINOLate = 1,1′-bi-2-naphtholate) show maximal |glum| values of 0.83 (at 1510 nm) and 0.29 (at 1545 nm) respectively, with the former complex possessing the strongest CPL within the NIR to date.

Graphical abstract: Intense 1400–1600 nm circularly polarised luminescence from homo- and heteroleptic chiral erbium complexes

Supplementary files

Article information

Article type
Paper
Submitted
03 Janv. 2023
Accepted
12 Marts 2023
First published
13 Marts 2023

J. Mater. Chem. C, 2023,11, 5290-5296

Intense 1400–1600 nm circularly polarised luminescence from homo- and heteroleptic chiral erbium complexes

O. G. Willis, A. Pucci, E. Cavalli, F. Zinna and L. Di Bari, J. Mater. Chem. C, 2023, 11, 5290 DOI: 10.1039/D3TC00034F

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