The molecular structure and absorption spectrum of hydroxy substituted dibenzoylmethanatoboron difluoride in solution: A theoretical and experimental study

Synthesis, photophysical and electrochemical properties of novel and highly fluorescent difluoroboron flavanone β-diketonate complexes

“…Based on theoretical and experimental demonstrations, Gelfand et al suggested that the deformation of the spectral shape observed in THF is due to numerous vibrations outside the plane and explicit solvation which results in several low-frequency intermolecular vibrations and vibrations from the solvent molecule itself. 21 The molar absorption coefficients of main absorption wavelength are between 0.1 Â 10 4 M À1 cm À1 (for compound 4d and 4f) to 1.1 Â 10 4 M À1 cm À1 (for compound 4g). The maxima emission wavelength in THF occurs between 482 nm and 496 nm (compound 4h) as shown in Table 5.…”

“…The bands observed in the region of 1180-1170 cm À1 were attributed to the B-O stretching vibration and the bands at 1030-1050 cm À1 were attributed to the B-F stretching vibrations. 21,22 In order to describe vibrational modes that are infrared active we performed calculations using the ORCA program with B3LYP functional (see Computational details) for compound 4a and compared them with experimental results. Fig.…”

Белое Излучение Полимерных Люминесцентных Композиций, Допированных Хелатами Бора

“…Отличительными особенностями представителей данного класса соединений является образование J-агрегатов в насыщенных растворах и высококонцентрированных ПЛК, что приводит к увеличению фотостабильности [12]. Кроме того, βдикетонаты дифторида бора отличаются простотой получения [13], высоким квантовым выходом люминесценции растворов и кристаллов во всем видимом и ближнем инфракрасном диапазоне. Отмечено, что эксимерная люминесценция в насыщенных растворах и кристаллах β-дикетонатов дифторида бора позволяет получать различные цветовые комбинации при использовании одного люминофора.…”

White emission of polymeric luminescent compositions doped with boron chelates

“…Distinctive features of this compound class representatives are the formation of J-aggregates in saturated solutions and highly concentrated PLCs, which leads to an increase in photostability [12]. In addition, β-diketonates of boron difluoride are notable for their easy preparation [13], high quantum yield of luminescence solutions and crystals in the entire visible and near-infrared range. It was noted that excimer luminescence in saturated solutions and crystals of β-diketonates of boron difluoride allows obtaining different color combinations using a single luminophore.…”