Luminescence Color Tuning from Blue to Near Infrared of Stable Luminescent Solid Materials Based on Bis-o-Carborane-Substituted Oligoacenes.
Hirofumi NaitoKenta NishinoYasuhiro MorisakiKazuo TanakaYoshiki ChujoPublished in: Chemistry, an Asian journal (2017)
Aryl-substituted o-carboranes have shown highly efficient solid-state emission in previous studies. To demonstrate color tuning of the solid-state emission in an aryl-o-carborane-based system, bis-o-carborane-substituted oligoacenes were synthesized and their properties were systematically investigated. Optical and electrochemical measurements revealed efficient decreases in energy band gaps and lowest unoccupied molecular orbital (LUMO) levels by adding a number of fused benzene rings for the extension of π-conjugation. As a consequence, bright solid-state emission was observed in the region from blue to near infrared (NIR). Furthermore, various useful features were obtained from the modified o-carboranes as an optical material. The naphthalene derivatives exhibited aggregation-induced emission (AIE) and almost 100 % quantum efficiency in the crystalline state. Furthermore, it was shown that the tetracene derivative with NIR-emissive properties had high durability toward photo-bleaching under UV irradiation.
Keyphrases
- solid state
- highly efficient
- light emitting
- molecular docking
- ionic liquid
- fluorescent probe
- high resolution
- photodynamic therapy
- quantum dots
- energy transfer
- high speed
- living cells
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- hydrogen peroxide
- single cell
- mass spectrometry
- atomic force microscopy
- radiation therapy
- molecular dynamics simulations
- simultaneous determination