Boron(III) Complexes with N,N’- and N,O-Heterocyclic Ligands: Synthesis and Spectroscopic Properties

Graphical Abstract

Abstract

This review is focused on consideration of effects of the nature of N,N’- and N,O-bidentate ligands on the structure and optical properties of their B(III) complexes. It has been established that B(III) complexes with asymmetric N,N’- and N,O-bidentate ligands, such as ortho-hydroxyphenyl substituted azaheterocycles and heteryl-β-ketoimines, exhibit large Stokes shifts, enhanced intensity, and extended range for luminescence in solutions as well as in solid state, comparable with characteristics of the family of BODIPYs derivatives. Complexes of some bidentate ligands can be considered as promising fluorophores for applications in biomedical imaging, electroluminescent, solar cell devices, and other fields.

Keywords:

• B(III) complexes
• BODIPY
• asymmetric NN’-ligands
• (o-hydroxyphenyl) substituted azaheterocycles
• heteryl-β-ketoimines
• structure
• optical properties
• photoluminescence

Additional information

Funding

This work was supported by the Russian Foundation for Basic Research (grant 14-03-00340) and Ural Division of Russian Academy of Sciences (project 15-21-3-7).