Steric and Electronic Control of Chiral Eu(III) Complexes for Effective Circularly Polarized Luminescence

Yuichi Kitagawa; Makoto Tsurui; Yasuchika Hasegawa

doi:10.1021/acsomega.9b03613

Steric and Electronic Control of Chiral Eu(III) Complexes for Effective Circularly Polarized Luminescence

ACS Omega. 2020 Feb 7;5(8):3786-3791. doi: 10.1021/acsomega.9b03613. eCollection 2020 Mar 3.

Authors

Yuichi Kitagawa^{1

2}, Makoto Tsurui¹, Yasuchika Hasegawa^{1

2}

Affiliations

¹ Faculty of Engineering and Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita-13, Nishi-8, Sapporo, Hokkaido 060-8628, Japan.
² Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita-21, Nishi-10, Sapporo, Hokkaido 001-0021, Japan.

Abstract

Circularly polarized luminescence (CPL) is characterized by the differential emission of right and left circularly polarized light by a chiral molecule. This mini-review describes the recent developments in chiral trivalent europium (Eu(III)) complexes with effective CPL. CPL has many potential applications in security tags, lasers, and three-dimensional organic electroluminescence devices, which is one of the most intensely investigated topics in molecular luminophores. Eu(III) complexes have attracted considerable attention as effective CPL luminophores for the above-mentioned applications. In this review, recent studies on the Eu(III) CPL, including the steric (dimer, tetramer, aggregates, and coordination polymers) and electronic control (mononuclear) of Eu(III) complexes for the construction of a luminophore with effective CPL, are discussed. The characteristic CPL applications employing the chiral mononuclear Eu(III) complexes are also described. Chiral Eu(III) complexes with well-designed organic ligands can result in the establishment of new research areas in the fields of photochemistry and materials science.

Publication types

Review