Poly(benzyl ether) dendrimers with strongly fluorescent distyrylbenzene cores as the fluorophores for peroxyoxalate chemiluminescence: insulating effect of dendritic structures on fluorescent sites

Fluorescence quenching of versatile fluorescent probes based on strongly electron-donating distyrylbenzenes responsive to aromatic chlorinated and nitro compounds, boronic acid and Ca2+

“…have been frequently used for the fluorescent sites [11.12]. In general, distyrylbenzenes are strongly fluorescent and very versatile compounds because of availability of a number of derivatives with various properties such as absorption, fluorescence, oxidation potential, and solubility toward various media, which can be controlled by the electronic nature of the substituens on the distyrylbenzenes [13][14][15][16].…”

Harnessing “Click”‐Type Chemistry for the Preparation of Novel Electronic Materials

“…), yielding trimer E , E‐35 , which was, in turn, deprotected under 5% HCl to yield aldehyde E,E ‐ 36 , Scheme . In an alternative route, two equivalents of dimer 25 were coupled with the symmetrical bi‐functional reagent 37 17 (THF, t‐BuOK, 2 h, 0 °C), forming oligomer 38 , Scheme .…”

“…Oligomer ( E,E,E,E‐38 ): Bi‐functional reagent 37 30 (0.12 g, 0.19 mmol) was dissolved in dry THF (8 mL) then the solution was cooled to 0 °C and t‐BuOK (0.17 g, 1.55 mmol) was added. After 3 min E‐34 (0.2 g, 0.39 mmol) was added and the resulting mixture was stirred at rt under nitrogen for 2 h. The solvent was then removed under reduced pressure and the product was purified over alumina (3:7, methylene chloride:hexane) affording 0.13 g (53% yield) of E,E,E,E‐38 in the form of a red solid.…”

Peroxyoxalate chemiluminescence enhanced by oligophenylenevinylene fluorophores in the presence of various surfactants

“…Fluorescence quantum yields (Φ F ) were estimated using 9,10‐diphenylanthracene (Φ F = 0.91 in benzene) as a standard. Measurements of the total CL quantum yield (Φ CL ) were carried out by a photon‐counting method using a Hamamatsu Photonics R464 photomultiplier connected to a photon‐counting unit (C3866) and a photon‐counting board M8784, according to a previously reported procedure . Luminol CL in dimethylsulfoxide was used as the standard to calibrate the photomultiplier tube.…”

“…By contrast, many aromatic fluorophores have been used for PO‐CL, and we have shown that 1,4‐distyrylbenzenes are very useful in PO‐CL systems because of their strong fluorescence, controllable emission wavelength and synthetic availability . Because distyrylbenzene is one of the oligophenylenevinylenes useful as a fluorescent material for optoelectronic and photonic devices , it is interesting to use some low molecular mass oligophenylenevinylenes as fluorophores for PO‐CL systems.…”