Yu Hu

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 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 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 Resolusion of Ethyl (S)-Nipecotate and the New Synthesis of Ethyl-1- (2-Thiopheneacetyl)-3-Piperidine Carboxylate

The optically pure ethyl nipecotate is an important drug intermediates. It was used for a variety of synthesis of APIs and pharmaceutical intermediates. In this paper we launched a study of the split of ethyl nipecotate. An efficient resolution of (±)-nipecotic acid has been achieved by the fractional crystallization with good yield and high enatio. The compound (S)-ethyl-1-(2-thiopheneacetyl)-3-piperidine-carboxylate is an investigational immune potentiating agent targeting direct stimulation of immune cells, useful for the prevention of infectious diseases in livestock.

The New Synthesis of Quinoxaline Derivatives Monomer

The monomer of 2,3-di (thiophen-2-yl) quinoxaline (M1) and 2,3-di (thiophen-2-yl) 1,4-pyradiazine (M2) have been synthesized in moderate yields over two steps from readily available starting materials. The π-conjugated Polymer based on 2,3-di (thiophen-2-yl) quinoxaline was synthesized by Electrochemical workstation which was carried out in DCM/ Bu4NBF4 (0.1M) as the solvent/electrolyte couple. The new π-conjugated Polymer can slightly soluble in organic solvents such as methylene chloride and acetonitrile.

The New Synthesis of 4,7-dithienyl[ 2,1,3]-benzoselenadiazole

Heterocyclic monomers based on benzo [[1,2,thiadizole 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 4,7-di (thiophen-2-yl) benzo [[1,2,selenadizole are presented. The new dificient acceptor has good solubility in organic aolvents to permit an appropriate coating process.

Chiral Discrimination of the Diastereomeric Salts with (R)-Nipecotic Acid and Tartaric Acid Derivative

An effective resolving agent, (D)-dibenzoyl tartaric acid (2b), was screened to yield direct resolution of (S)- ethyl nipecotate (1) with high optical purity and yield. Molecular recognition was studied by 1H NMR, IR, DSC and single crystal diffraction of the pair of diastereomeric salts. The less-soluble salt formed a supra molecular structure by enantio differentiating self-assembly.

The Saturated - Unsaturated Seepage Analysis of Hualianshu Landslide on the Condition of Rainfall

With the saturated - unsaturated seepage theory, Hualianshu landslide is seepage numerical simulated by the finite element method .The changes of Hualianshu landslide seepage are subject to the impact of rainfall and reservoir water levels changes.The formation and variation of the slope seepage field under rainfall infiltration have been come to, providing a basis for analysis of slope stability and landslide prediction.

The Synthesis of Novel Material 3,4-ethylenedioxyfuran

A synthetic approach to synthesize 3,4-ethylenedioxyfuran from a common precursor Diglycolic acid is reported. Starting from ethylene diglycol, a six-step synthesis afforded EDOF in 10% overall yield. The procedure described herein offers several advantages, including high product yields, easy purification.

Synthesis of a New Platinum Acetylide Polymer with a Pyrimidine Moiety for Organic Solar Cells

A soluble, solution-processable metallopolyyne of platinum (II) functionalized with electron-deficient pyrimidine spacer was synthesized. The spectroscopic and photophysical properties of the polymer was also presented.