Tetra-coordinated boron-appended zinc(ii)-salen: a highly selective fluorescence-based sensor for Sm3+ ions via sensitization

Abstract

Selective detection of metal ions is very important from environmental and biological points of view. In this regard, selective discrimination between lanthanoid ions is very difficult and challenging owing to...

Red-Emitting Tetraphenylethylene-Based Boron Thioketonates: Effect of Substitution and Study of Nonlinear Optical Properties

“…Boron-containing luminescent materials, − especially four-coordinated boron-containing luminescent materials, − have attracted considerable interest in various fields such as photovoltaics, organic field-effect transistors, light-emitting devices, and sensors owing to their tuneable and strong absorption, emission and stability over three-coordinated boron compounds. − Among the different tetracoordinated boron-containing luminescent materials, boron-β-diketonates have been studied to a greater extent due to their large molar extinction coefficients and high fluorescence quantum yields. Much effort has been paid to tune the photophysical properties of boron-β-diketonates by chemically modifying the π-conjugation via the substituents. ,− For example, Fraser and co-workers explored the substituent effect of boron-β-diketonates and studied them as stimuli-responsive materials, , and Chujo and co-workers described the effect of B–F vs B–aryl. , More recently, Adachi and co-workers demonstrated the use of boron-β-diketonates as NIR emissive materials. , Furthermore, efforts have been made to tune the photophysical properties by replacing one or two of the oxygen atoms present in the diketone moiety.…”