61040-42-4Relevant articles and documents
A Fluorescence–Phosphorescence–Phosphorescence Triple-Channel Emission Strategy for Full-Color Luminescence
?gren, Hans,Baryshnikov, Gleb,Deng, Chao,Li, Xuping,Weng, Taoyu,Wu, Bin,Wu, Hongwei,Zeng, Tao,Zhu, Liangliang,Zou, Qi
, (2020)
Organic luminogens constitute promising prototypes for various optoelectronic applications. Since gaining distinct color emissions normally requires the alternation of the conjugated backbone, big issues remain in material synthetic cost and skeleton compatibility while pursuing full-color luminescence. Upon a facile one-step coupling, three simple but smart perchalcogenated (O, S, and Se) arenes are synthesized. They exhibit strong luminescent tricolor primaries (i.e., blue, green, and red, respectively) in the solid state with a superior quantum yield up to >40% (5–10 times higher than that in corresponding solutions). The properties originate from a fluorescence–phosphorescence–phosphorescence triple-channel emission effect, which is regulated by S and Se heavy atoms–dependent intersystem crossing upon molecular packing, as well as Se–Se atom interaction–caused energy splittings. Consequently, full-color luminescence, including a typical white-light luminescence with a Commission Internationale de I'Eclairage coordinate of (0.30, 0.35), is realized by complementarily incorporating these tricolor luminescent materials in the film. Moreover, mechanochromic luminescent color conversions are also observed to achieve the fine-tuning of the luminescent tints. This strategy can be smart to address full-color luminescence on the same molecular skeleton, showing better material compatibility as an alternative to the traditional multiple-luminophore engineering.
Molecular asterisks with a persulfurated benzene core are among the strongest organic phosphorescent emitters in the solid state
Fermi, Andrea,Bergamini, Giacomo,Peresutti, Romain,Marchi, Enrico,Roy, Myriam,Ceroni, Paola,Gingras, Marc
, p. 113 - 122 (2014/08/18)
A series of functionalized persulfurated benzene molecules were synthesized. Their photophysical properties and crystal structures were analyzed. All compounds are non-emitting in solution at room temperature, but in a sharp contrast, quantum yields can be very high (up to 100%) in the solid state at 298 K or in a rigid matrix at low temperatures. This is a consequence of a decrease of intramolecular rotations and motions, but conformational and rotamer issues along with substituent effects might also play a role. These compounds are among the rare examples of highly phosphorescent organic materials, due to a Crystallization Induced Phosphorescence or to an Aggregation Induced Phosphorescence. Compound 1 is among the most phosphorescent solid known to date. They thus represent an alternative to heavy metal ion-based triplet emitters in solid state.
AN EFFICIENT SYNTHESIS OF HEXA-SUBSTITUTED BENZENES AND THE DISCOVERY OF A NOVEL HOST CONFORMATION FOR HEXAKIS(β-NAPHTHYLTHIO)BENZENE
MacNicol, David D.,Mallinson, Paul R.,Murphy, Anthony,Sym, Gordon J.
, p. 4131 - 4134 (2007/10/02)
The title host molecule (III) has been synthesised by reaction of hexachlorobenzene with an excess of the sodium salt of β-mercaptonaphthalene in 1,3-dimethyl-2-imidazolidinone (DMEU) as solvent; other hexakis(arylthio)benzenes, hexakis(phenoxy)benzene (I
