External environment sensitive circularly polarized luminescence properties of a chiral boron difluoride complex

Abstract

Circularly polarized luminescence properties of chiral boron difluoride complexes bearing a diethylamino group successfully controlled by external environment.

Luminescent solvent-free liquids based on Schiff-base boron difluoride complexes with polyethylene glycol chains

“…In all complexes, the boron centre took a tetrahedral conformation, which is similar to results in previous reports. 18,19…”

“…As part of our research for the creation of highly fluorescent materials, we recently reported that mono- 14,18,19 and dinuclear 20 boron difluoride complexes exhibited efficient photoluminescence even in the aggregated state. Furthermore, we have achieved lowering the melting point of a boron difluoride complex by introducing polyethylene glycol (PEG) chains into the aromatic rings of Schiff-base ligands, and have succeeded in demonstrating CPL in the solvent-free liquid state.…”

Circularly Polarized Luminescent Bis(Boron Difluoride) Complexes with Chiral Schiff‐base Ligands

“…Small organic CPL‐active molecules (CPL‐SOMs) have attracted considerable attention in the last decade for their potential application in next‐generation optical devices. Our group is investigating CPL‐SOMs with chiral Schiff‐base ligands, and recently reported that boron difluoride complexes exhibit efficient and tunable CPL properties [1, 2] . These findings prompted us to clarify two questions: (1) How do the molecular structures affect the CPL properties; (2) How does molecular alignment affect their CPL properties.…”

“…Our group is investigating CPL-SOMs with chiral Schiff-base ligands, and recently reported that boron difluoride complexes exhibit efficient and tunable CPL properties. [1,2] These findings prompted us to clarify two questions: (1) How do the molecular structures affect the CPL properties; (2) How does molecular alignment affect their CPL properties. The second of these questions is discussed in this work.…”

Circularly Polarized Luminescence from Schiff‐base [4]Helicene Boron Complexes

“…As part of our research to create efficient CPL-active materials, we have been investigating boron difluoride complexes with (N O)-chelate Schiff-base ligands. [17][18][19][20] In the course of these studies, we have achieved the development of materials that exhibit highly efficient CPL in response to molecular aggregation [17,19,20] or changes in the external environment [18] through the appropriate design of the Schiffbase ligands. In this work, we designed the new helical boron complexes 1 a and 1 b based on Schiff-base [4]helicene ligands (Figure 1).…”