Xiao Xia Sun

Synthesis, Characterization of Novel π-Conjugated Polymers Acceptor 5,6-bis(heptyloxy)benzo[c][1,2,5]thiadiazole

Monomers based on 2,1,3-benzothiadiazole bearing solubilizing side chains have been synthesized in high yields over four steps from readily available starting materials. A multistep synthesis of the electron-poor 5,6-bis (heptyloxy) benzo [[1,2,thiadiazole are presented. The new deficient acceptor has good solubility in organic solvents to permit an appropriate coating process.

Synthesis, Characterization of Novel π-Conjugated Oligomers for Photovoltaic Applications

Heterocyclic monomers based on 2,1,3-benzothiadiazole bearing solubilizing side chains have been synthesized in high yields over four steps from readily available starting materials. The new dificient acceptor has good solubility in organic aolvents to permit an appropriate coating process. Two soluble donor-acceptor π-conjugated oligomers comprising electron-rich thiophenes the electron-deficient EDOBT have been carefully investigated.

Synthesis of a Novel Acceptor Unit for D-A Type Polymers: 4,8-Dibromobenzo-[1,2-c;4,5-c′]bis[1,2,5]thiadiazole

A synthetic approach to synthesize 4,8-Dibromobenzo-[1,2-c;4,5-c’] bis[1,2,5]thiadiazole from a common precursor 2,1,3-Benzothiadiazole is reported. This unit can then be used in the synthesis of low bandgap materials via palladium-catalyzed coupling reactions.

Synthesis of a New Platinum Metallopolyyne for Organic Solar Cells

A soluble, solution-processable metallopolyyne of platinum (II) functionalized with anthraquinone and fluorene spacers was synthesized. The spectroscopic and photophysical properties of the polymer was also presented.

Synthesis of [6,7]-Dihydro-[1,4]-Dioxino-[2,3-f][2,1,3]-Benzothiadiazole: A Novel Building Block for Electron-Poor Conjugated Polymers"

Heterocyclic monomers based on 2,1,3-benzothiadiazole bearing solubilizing side chains have been synthesized in high yields over four steps from readily available starting materials. A multistep synthesis of the electron-poor 6, 7-dihydro-1, 4-dioxino-[2, 3-f][2,1,3]-benzothiadiazole are presented. The new dificient acceptor has good solubility in organic aolvents to permit an appropriate coating process.

Synthesis of a Novel Donor Unit for D-A Type Polymers: 2,7-di(5-Bromothiophen-2-yl)-10-Hexadecyl-Phenoxazine

A new electron-rich unit, 2,7-di(5-bromothiophen-2-yl)-10-hexadecyl- phenoxa-zine, has been prepared in high yield over four steps. The compound with good solubility, electronic and optical properties may be a candidate for D-A type organic polymers.

The Synthesis of Novel Material 2,3-Dimethyl-2,3-dihydrofuro(3,4-b)(1,4)dioxine-5,7-dicarboxylic acid

organic light-emmitting material, synthesis, π-conjugated polymers Abstract. A new synthetic approach to synthesize 2,3-dimethyl -2,3-dihydrofuro (3,4-b)(1,4) dioxine-5,7 -dicarboxylic acid from a common precursor diglycolic acid was reported. Starting from the commercial material diethylene glycol, diethyl oxalate and 2,3-dibromobutane, the compound was synthesized through oxidation reaction, acylation, hydrolysis and elimination reaction with moderate yield via a five-step reaction. The procedure was described herein with several advantages, including high product yields and easy purification.

Synthesis of Novel Monomer with Quinoxaline Derivatives

Novel rigid dendrimer containing cross-conjugated units are synthesized from the coupling of 2-thiophene-based dendron with 5,8-dibromo-2,3-dithienylquinoxaline. The new monomer 2,3,5,8-tetrathienylquinoxaline has been successfully synthesized with moderate yield over five steps. The structure of the monomer was determined by H-NMR and C-NMR technologies. And the optical characterization of the monomer was also determined by the UV-vis and fluorescence spectrometer. The monomer has a high absorption peak at 206 nm and high emission peak at 430 nm. The monomer was freely soluble in variety of organic solvent, such as chloroform and acetonitrile.

Synthesis of a New Monomer: 4,7-bis(5-phenylthiophen-2-yl)benzo[c][1,2,5]selenadiazole

A donor/acceptor/donor-type benzoselenadiazole-incorporated monomer was synthesized. The procedure described herein offer several advantages, including high product yields, easy purification and large scale production. Optical properties of the resulting compounds were examined by means of UV-vis and fluorescence spectroscopies. The fluorescence spectra exhibit that the emission maxima of material at 419 nm belongs to blue light region.

Synthesis of a Novel D-A Type Photoelectrical Material: 5,5'-(9,9-Dioctyl-9H-Fluorene-2,7-Diyl)bis(Thiophene-2-Carbaldehyde)

A donor-acceptor organic molecule based on fluorene unit as an electron donor and aldehyde group as an electron acceptor has been demonstrated in high yields over four steps. This approach offers a much milder and more efficient route to synthesize the target compound via the Vilsmeier-Haack reaction. Optical spectra show that the electron-accepting groups induce an intermolecular charge transfer, resulting in a shift of the absorbance maximum toward longer wavelength. Such D-A type intermediate compounds as organic molecules display a significantly improved property profile in photoelectrical materials for applications in organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and organic field-effect transistors (OFETs).