Tuning the structures and photophysical properties of 9,10-distyrylanthrance (DSA) via fluorine substitution

Abstract

Because of the differences in the position and degree of fluorine substitution, four fluorinated DSA derivatives, namely 4-BFSA, 3-BFSA, BDFSA and BTFSA, display different crystal packing and photophysical properties in the solid state.

A Bidentate Ru(II)-NC Complex as a Catalyst for Semihydrogenation of Alkynes to (E)-Alkenes with Ethanol

“…In addition, this methodology has been extended to the synthesis of benzene-1,4-bis­(phenylenevinylene) (OPPV) ( 3ae ) and 9,10-distyrylanthracene (DSA) ( 3af ), which have great potential in the area of organic light-emitting diodes (OLEDs), although 12 h was needed in both cases due to the poor solubility of the starting alkynes 1,4-bis­(phenylethynyl)­benzene and 9,10-bis­(phenylethynyl)­anthracene . In comparison to the Wittig reaction, this method is preferable because it does not generate as much waste and column chromatography is not necessary to remove the cis – cis and cis – trans isomers …”

Supramolecular Interactions‐Assisted Polymorphism and Unique Mechanofluorochromism in 9,10‐Bis((E)‐4‐(trifluoromethyl)styryl)anthracene

“…At higher water fractions, the solvating power of the resulting mixture becomes so poor, that luminogens begin to gather together to form molecular aggregates with an increase in the intensity of emission. [29] The dominance of the AIEE effect over the TICT phenomenon is the possible explanation for the observed phenomenon, and these changes in intensity and wavelength are shown in Figure 5c. The apparent red shift (for f w > 55 %) observed with a level-off tail in the visible region in the UV-Visible absorption spectra also confirms the formation of aggregates (Figure S16).…”

“…From Figure 5b, it is clear that up to f w = 50 %, the emission intensity significantly decreased due to the twisted intramolecular charge transfer (TICT) between the electron donating anthrylene core and the electron withdrawing -CF 3 moiety. [29] From f w = 55 % onwards, a sudden hypsochromic shift originated with an enhancement in emission intensity. The new narrow emission band formed with λ max ~486 nm appears entirely different from emission peaks at lower water fractions.…”

Progress in 9,10-distyrylanthracene derivatives with aggregation-induced emission

“…[17] ; 三氟甲基取代的化合物18和氟取代的化合 物19, 晶体的荧光均为黄绿色, 荧光效率可达70%以 上 [18] . 孙柏旺研究组 [19,20] 报道了不同卤素取代的化合 物6~9, 其晶体表现出逐渐红移的发光特性, 与溶液完 全不同. 改变DSA分子的取代基, 可以影响分子间的相 互作用, 从而调控晶体的堆积模式.…”