Metal cation-induced optical characterization of oligomeric polycyanostyryl derivative

Chemical Sensors Based on Amplifying Fluorescent Conjugated Polymers

“…There have been several other studies recently published concerning the metal ion-sensing properties of fluorescent conjugated polymers that incorporate pyridine rings into the backbone. Lee and co-workers reported a poly(pyridyl phenylene) as well as a poly(cyanostyryl) derivative, the fluorescence intensities of which were quenched in the presence of Fe 3+ . In addition, a series of poly(pyridyl phenylene)s capable of inter- and intramolecular hydrogen bonding have shown strong ionochromic and fluorescence quenching responses to Cu 2+ and Fe 3+ in THF …”

Study on fluorescence properties of carbogenic nanoparticles and their application for the determination of ferrous succinate

“…Despite the accurate structure of the carbogenic NPs being still unclear, the phenomenon that the emission band maximum shifted to longer wavelengths as the excitation wavelength increases across the whole visible range suggests a superposition of different types of fluorescent species (e.g., condensed polyaromatic systems) in carbogenic NPs [14]. In addition, their multi-element composition (C, O, H and N) of synthesis materials offered the possibility of formation of complicated heterocyclic compounds such as certain fluorescent recognition groups like quinoline [21,22], acridine [23], and cyanostyryl [24], which played an important role in the selectivity of ferric ions.…”

Synthesis and fluorescent sensory properties of a 5-cyanostilbene derivative linked to monoaza-15-crown-5

“…p-Bromo(N-monoaza-1-tetraoxa-4,7,10,13-cyclopentadecane)-5-cyanostilbene (CN-Crown) (Cho et al, 2002;Na et al, 2004) Under nitrogen atmosphere, a mixture of (4-bromophenyl)acetonitrile (0.2 g, 1.1 mmol) in THF (5 ml, dried) was added with THF solution of potassium tert-butoxide (1.2 ml, 1.1 mmol) at 0 8C and stirred for 30 min at the room temperature. The mixture was stirred for 2 days at room temperature after adding compound 5 (0.3 g, 0.9 mmol, dissolved in 10 ml THF).…”