Unusual Magnetic Field Responsive Circularly Polarized Luminescence Probes with Highly Emissive Chiral Europium(III) Complexes

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.

Spin Effect to Promote Reaction Kinetics and Overall Performance of Lithium‐Sulfur Batteries under External Magnetic Field

“…The use of static fields to promote (electro)catalytic performance at a negligible energy cost is a topic of major interest [1–4] . In particular, moderate magnetic fields externally applied by permanent magnets or built‐in using ferromagnetic additives can modify the properties of the reaction precursor/intermediate/ product and of the catalyst itself to enhance catalytic activity, selectivity and even stability [5–7] . A magnetic field can drive ions/molecules, orientate them and their orbitals, modify the orbital symmetry, and reduce/increase orbital overlapping, thus the molecular bond strength to facilitate cleavage/bonding [8–10] .…”