基于4-四苯基乙烯基胺和5-硝基水杨醛合成了一种新的基于四苯基乙烯的席夫碱N -5-硝基水杨基-4-四苯基乙烯基胺(NSTPE),并通过1 H NMR,13 C NMR,MS和单晶对结构进行了全面表征X射线衍射分析。光学性质的研究表明,当在NSTPE的四氢呋喃溶液中加水时,发射物表现出有趣的“开-关-开”转换特性,呈U形趋势,显示出扭曲的分子内电荷转移(TICT)和聚集诱导的发射(AIE)的特征。此外,该化合物表现出可逆的压电氟致变色性质。
Regio- and Stereoselective Route to Tetrasubstituted Olefins by the Palladium-Catalyzed Three-Component Coupling of Aryl Iodides, Internal Alkynes, and Arylboronic Acids
作者:Chengxiang Zhou、Richard C. Larock
DOI:10.1021/jo048265+
日期:2005.5.1
The Pd-catalyzed three-component coupling of readily available aryl iodides, internalalkynes, and arylboronic acids provides a convenient, one-step, regio- and stereoselective route to tetrasubstitutedolefins in good to excellent yields, although electron-poor aryl iodides and dialkylalkynes normally afford only low yields under our standard reaction conditions. The proper combination of substrates
Three Phase Microemulsion/Sol–Gel System for Aqueous C–C Coupling of Hydrophobic Substrates
作者:Dmitry Tsvelikhovsky、Jochanan Blum
DOI:10.1002/ejoc.200800028
日期:2008.5
coupling reactions with hydrophobic substrates have been carried out in water. The substrates are initially transformed by a general procedure into a microemulsion, which consists of nearly 90 % water with the aid of sodium dodecyl sulfate and either PrOH or BuOH. The surfactant carries the molecules of the substrates to Pd(OAc)2 entrapped within a hydrophobicitized silica sol–gel matrix where the coupling
Synthesis and photophysical properties of tetraphenylethylene derivatives as luminescent downshifting materials for organic photovoltaic applications
作者:Hélio Lopes Barros、Maria Alexandra Esteves、Maria João Brites
DOI:10.1016/j.dyepig.2021.109724
日期:2021.11
the design and synthesis of a series of tetraphenylethylene (TPE) derivatives based on TPE-A or A-π-TPE-π-A molecular structure featuring various electron-acceptor (A) groups. The photophysical properties of the new LDS compounds were systematically studied in 1,4-dioxane solution and film (Zeonex) by UV–visible absorption and fluorescence spectroscopy, and electrochemical properties studied by cyclic
Photochemical Electron-Transfer Generation of Arylthiirane Radical Cations with Tetranitromethane and Chloranil — Some Novel Observations
作者:Marcelo Puiatti、Juan E. Argüello、Alicia B. Peñéñory
DOI:10.1002/ejoc.200600400
日期:2006.10
The radicalcationsfrom 2,2,3,3-tetraphenylthiirane (1a), 2,2-bis(4-methoxyphenyl)-3,3-diphenylthiirane (1b), and trans-2,3-diphenylthiirane (1c) have been generated by photoinduced electron transfer (PET) reactions with tetranitromethane [C(NO2)4] and chloranil (CA). A charge-transfer complexe (CTC) absorption is observed by UV/Vis spectroscopy between thiiranes (1) and C(NO2)4. On the other hand
New tetraphenylethene-based Schiffbase ligand (TPE-ND) and its corresponding boronated complex (TPE-NDB) with aggregation-induced emission were designed and synthesized. Results showed that the inhibited C=N isomerization by N, O-chelated BF2 caused the significant intramolecular charge transfer features, and more dramatic solvatochromism. In particular, the solid sample of TPE-NDB exhibited an obvious