Blue fluorescence from N,O-coordinated BF2 complexes having aromatic chromophores in solution and the solid state

Abstract

N,O-Coordinated BF2 complexes (Ar@HCs) having aromatic (Ar) and heterocycle (HC) moieties were prepared, and their photophysical properties were investigated in solution and the solid state along with their crystal structures.

A difluoroboron compound with latent fingerprint detection and inkless writing based on aggregation-induced emission enhancement and mechanofluorochromic behavior

“…24 Combining the amide bond linkage moiety of the 2-position in the pyridine skeleton, the compound containing pyridine unit could act as a precursor of difluoroboron compounds. 25 As previously reported, we found that pyridine-based difluoroboron compound with the TPA group at the end of amide bond linkage moiety could be applied in the field of inkless writing. 26 If the TPA group was located at the 4-position of pyridine skeleton, the synthesized compound displayed also had excellent luminescent performance.…”

Dual-State Emission (DSE) in Organic Fluorophores: Design and Applications

“…147 In this category, Okamoto and co-workers reported a methodology to prepare a family of N,O-coordinated BF 2 complexes (45a−45g) with head-to-tail stackings as the primary arrangements observed on their X-ray structures. 148 In addition, simple B−N coordinated compounds also display DSE properties. Feng and co-workers reported compound 46 with a low quantum yield in solution (Φ F = 3%) but moderate solid state (Φ F = 54%).…”

“…The D–A complexes 44a – 44d (Scheme ) reported by Chujo and co-workers also display DSE properties with quantum yields ranging from Φ F = 17% to Φ F = 80% in solution and Φ F = 25% to Φ F = 81% in the solid state . In this category, Okamoto and co-workers reported a methodology to prepare a family of N , O -coordinated BF 2 complexes ( 45a – 45g ) with head-to-tail stackings as the primary arrangements observed on their X-ray structures …”