Unusual magnetic field responsive circularly polarized luminescence probes with highly emissive chiral europium(III) complexes

Junhui Zhang, Lixiong Dai, Alexandra M. Webster, Wesley Ting Kwok Chan, Lewis E. Mackenzie, Robert Pal, Steven L. Cobb, Ga-Lai Law

Research output: Contribution to journalArticlepeer-review

Abstract

Chirality is ubiquitous within biological systems where many of the roles and functions are still undetermined. Given this, there is a clear need to design and develop sensitive chiral optical probes that can function within a biological setting. Here we report the design and synthesis of magnetically responsive Circularly Polarized Luminescence (CPL) complexes displaying exceptional photophysical properties (quantum yield up to 31 % and |glum| up to 0.240) by introducing chiral substituents onto the macrocyclic scaffolds. Magnetic CPL responses are observed in these chiral EuIII complexes, promoting an exciting development to the field of magneto-optics. The |glum| of the 5D0 → 7F1 transition increases by 20 % from 0.222 (0 T) to 0.266 (1.4 T) displaying a linear relationship between the Δglum and the magnetic field strength. These EuIII complexes with magnetic CPL responses, provides potential development to be used in CPL imaging applications due to improved sensitivity and resolution.
Original languageEnglish
Pages (from-to)1017-1023
Number of pages7
JournalAngewandte Chemie
Volume133
Issue number2
Early online date22 Sep 2020
DOIs
Publication statusPublished - 11 Jan 2021

Keywords

  • chirality
  • circularly polarized luminescence
  • lanthanide
  • magnetic properties

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