Organic Dyes Containing a 1,3‐indandione Moiety as Light Harvesting Materials

Organic dipolar compounds containing a 1,3‐indandione‐5,6‐dicarboxylic acid moiety as an electron acceptor group were examined for the feasibility of using as the light harvesting material in dye‐sensitized solar cells. Two compounds with triphenylamine donor moieties were synthesized by attaching it to 1,3‐indandione‐5,6‐dicarboxylic acid. The device made with these simple dyes achieved a quantum yield up to 2.5 %, which is comparable to the widely used dye made with cyanoacrylic acid. The spectroscopic properties of these compounds were analysed with the aid of theoretical models according to the time‐dependent density functional theory.     

新型微球载体材料——PACA-co-PEG的性能

聚氰基丙烯酸烷基酯;药物载体;生物降解性     

Fabrication of nanometer-sized high-silica SAPO-5 and its enhanced photocatalytic performance for methyl orange degradation

Research on Chemical Intermediates - Higher efficient degradation of methyl orange (MO) was demonstrated with nanometer-sized high-silica SAPO-5. By a hydrothermal process, synthesized high-silica...     

Streptomycindole,an Indole Alkaloid from a Marine Streptomyces sp. DA22 Associated with South China Sea Sponge Craniella australiensis

A new indole alkaloid, streptomycindole ( 1 ), and a known related compound, N‐phenylacetyl‐L ‐tryptophan ( 2 ), have been isolated from Streptomyces sp. DA22, associated with South China Sea sponge Craniella australiensis. Their structures were established on the basis of a combination of mass spectrometry, ¹H‐ and ¹³C‐NMR spectroscopic analyses, and chemical methods.     

Synthesis of Novel Thioglycoside Derivatives Containing Quinazolinone

A series of novel thioglycoside derivatives containing 4(3H)‐quinazolinone was designed and synthesized from 2‐chloromethyl‐quinazolin‐4(3H)‐ones and 1‐thioglycose. Several 2‐chloromethyl‐quinazolin‐4(3H)‐ones were synthesized on refluxing with 2‐(chloroacetylamino)‐benzoic acid and arylamines in acetonitrile. All of the novel compounds were characterized by IR, ¹H NMR spectra and elemental analysis. The structures of compounds 7b, 8b and 8c have been determined by X‐ray diffraction analysis.     

Syntheses and Crystal Structures of Copper(II) and Silver Complexes with 5‐Methyl‐1‐(4‐Methylphenyl)‐1,2,3‐Triazol‐4‐Carboxylic Acid

Two novel complexes [Cu L ₂(MeOH)] ( 1 )and [Ag₂ L (H L )₂(MeOH)] ( 2 ) ( L = 5‐methyl‐1‐(4‐methylphenyl)‐1,2,3‐triazol‐4‐carboxylic acid) were synthesized and characterized by elemental analysis, IR and X‐ray diffraction. Complex 1 is a mononuclear structure; the molecules were assembled into an infinite 2–D supramolecular by the C–H···O weak interactions. Complex 2 is a centrosymmetric dinuclear structure with bis(unidentate) carboxylato co‐ordination mode, and the molecules were assembled into 2–D layers by C–H···O and O–H···O weak interactions.     

杂多酸盐Na3H8[La（PW11O39）2]·19H2O的合成与晶体结构

合成了二维层状单缺位Keggin结构阴离子稀土衍生物Na3H8[La（PW11O39）2].19H2O,并用IR和X射线单晶衍射等手段对其进行了表征.该晶体属于单斜晶系,P2/n空间群,a=1.343 43（8）nm,b=1.259 35（7）nm,c=3.541 8（2）nm,β=99.151 0（10）°,V=5.915 9（6）nm3,Z=2,R1=0.042 9,wR2=0.119 4.化合物阴离子[La（PWO）]11-通过NaO桥联形成一维链,再通过NaO桥联形成二维层状结构.     

Theoretical study on a new kind of thienyl-functionalized polysilane

A series of theoretical calculations were performed on thienyl-functionalized polysilanes in order to understand their geometries, excited state spectra, energy band structures, and adsorption stability onto Au (111) surfaces. The thienyl functionalization causes a significant red-shift of the electronic spectra of the oligosilanes, which is due to the maximum absorption energy resulting from σ → π* transition in oligo(methylthienylsilane) much lower than that from σ → σ* transition, and a great decrease of the σ → σ* transition energy in thienyl end-functionalized oligo(dimethylsilane). The thienyl substitution exerts a small effect on the band gap of the polysilane, and yet disturbs slightly the σ electronic delocalization. There exists a stable adsorption between thienyl-functionalized polysilanes and Au (111) surfaces through non-bonding interaction of thiophenes with Au.     

Reaction‐Based Colorimetric and Ratiometric Fluorescence Sensor for Detection of Cyanide in Aqueous Media

A stilbene‐based compound ( 1 ) has been prepared and was highly selective for the detection of cyanide anion in aqueous media even in the presence of other anions, such as F^?, Cl^?, Br^?, I^?, ClO₄^?, H₂PO₄^?, HSO₄^?, NO₃^?, and CH₃CO₂^?. A noticeable change in the color of the solution, along with a prominent fluorescence enhancement, was observed upon the addition of cyanide. The color change was observed upon the nucleophilic addition of the cyanide anion to the electron‐deficient cyanoacrylate group of 1 . The spectral changes induced by the reaction were analyzed by comparison with two model compounds, such as compound 2 with dimethyl substituents and compound 3 without a cyanoacrylate group. An intramolecular charge‐transfer (ICT) mechanism played a key role in the sensing properties, and the mechanism was supported by DFT/TDDFT calculations.