79293-43-9Relevant academic research and scientific papers
Aliphatic phenylene vinylene copolymers: Tuning the color of luminescence through co-monomer feed ratios
Hay,Klavetter
, p. 7112 - 7118 (1995)
By introducing co-monomers with flexible linker groups into growth condensation route to poly-(phenylene-alt-vinylene (PPV), a series of solution-processible PPV copolymers is prepared. Peak photoluminescence of these copolymers systematically ranges from about 2.25 to 2.75 eV (yellow-green to blue), increasing in energy upon increasing flexible linker content. Length of the linker group does not significantly alter spectral properties but does influence solubility and film morphology. The statistical distibution of phenylene vinylene segements along the copolymer backbone is discussed in the context of the optical profiles expected. Quantitative quenching of the luminescense for the shortest phenylene vinylene segments strongly indicates that crossover of excited states is occurring. The trapping and recombination of these excited states is occurring on lower-energy "islands", confirmed to be the longer phenylene vinylene segments, which serve as ideal recombination sites for photogenerated species.
Synthesis and characterization of Y-type polymers for second-order nonlinear optical applications
Kolli, Balakrishna,Mishra, Sarada P.,Palai, Akshaya K.,Kanai, Tapan,Joshi,Mohan, S. Raj,Dhami,Kukreja,Samui
, p. 836 - 843 (2013/03/28)
A series of dicyanomethylene-substituted polymers having Y-type molecular architecture were synthesized by Knoevenagel condensation reaction. The polymers were found to be soluble in organic solvents like tetrahydrofuran and chloroform. From gel permeatio
Efficient synthesis of alkylene bridging bisdihydropyridines
Liu, Dong-Mei,Du, Li-Ting,Sun, Jing,Yan, Chao-Guo
experimental part, p. 1333 - 1338 (2010/06/21)
Under microwave irradiation, vanillin was alkylated with α,W-dihaloalkane to give 4,4'-alkylene-bridging vanillins, which in turn underwent one-pot multicomponent reactions with excess of ethyl acetoacetate and ammonium bicarbonate to give 4,4'-alkoxy-bri
Improved synthesis of C2-symmetric 4,4′-α,ω- alkylenedioxy-bis(3-methoxybenzaldehydes)
Maley, Pepe' S.,Anderson, Rachel M.,Lewis, David E.
, p. 1583 - 1588 (2007/10/03)
An improved Williamson synthesis of C2-symmetric 4,4′-(α,ω-alkylenedioxy)-bis(3-methoxybenzaldehydes) from vanillin is described. These dialdehydes are often insoluble in cold acetone, which renders their purification especially facile. Copyrig
