中国化学快报

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Synthesis and characterization of insulin-5-Fu conjugate,enabling insulin as multi-drug carder via dendritic approach

Juan Huang, Jian Wei Wang, Tao Gong, Zhi Rong Zhang

中国化学快报. 2007, 18(03): 247-250. https://doi.org/10.1016/j.cclet.2006.12.026

摘要 ( )

可视化

To enable insulin as multi-drug carrier, we designed and synthesized dendritic linker molecule bearing three 5-fluorouracil residues at the branch ends. The new conjugate showed excellent water solubility. The stabilities under different conditions were investigated. The results showed that the conjugate was a potential prodrug to release free 5-Fu.

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Design and synthesis of 2-alkylbenzimidazole derivatives as novel non-peptide angiotensin Ⅱ AT₁ receptor antagonists

Jin Yi Xu, Qian Ran, Wei Yi Hua, Xiao Ming Wu, Qiu Juan Wang, Jing Zhang

中国化学快报. 2007, 18(03): 251-254. https://doi.org/10.1016/j.cclet.2006.12.029

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可视化

A series of 2-alkylbenzimidazole derivatives 9a-n have been designed and synthesized as a novel class of non-peptide angiotensin Ⅱ AT₁ receptor antagonists. The synthesized compounds were evaluated for their antagonism of angiotensin Ⅱ, induced contraction in the rabbit thoracic aortic ring and the results showed that compounds 9a, 9g and 9j exhibited potent antagonistic activity of AT₁ receptor.

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A new convenient asymmetric approach to herbarumin Ⅲ

Xue Song Chen, Shi Jun Da, Li Hong Yang, Bo Yan Xu, Zhi Xiang Xie, Ying Li

中国化学快报. 2007, 18(03): 255-257. https://doi.org/10.1016/j.cclet.2007.01.035

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The asymmetric total synthesis of herbarumin Ⅲ 3, a naturally occurred phytotoxin, along with 8-epi-herbarumin Ⅲ 22, was succeeded in 12 steps from n-butyraldehyde based on Brown's asymmetric allylation, taking modified Julia olefination and Yamaguchi's macro-lactonization as key steps.

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Facile synthesis of thiourea derivatives in ionic liquid

Min Liang Xiao, Feng Huang Chen, Zhi Juan Chen, Bao Shou Guo, Xian Hai Lv, Wen Ming Tang

中国化学快报. 2007, 18(03): 258-260. https://doi.org/10.1016/j.cclet.2007.01.036

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The synthesis of cinnamoyl thiourea derivatives from cinnamoyl isothiocyanate (CIT) with substituted aniline (RC₆H₄NH₂) was investigated in the mostly used ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, [Bmim][BF₄]. Significant enhancements in reactivity, yield and reaction rate were achieved. The products could be recovered by simple filtration. [Bmim][BF₄] could be recycled simply by removing water under vacuum and reused at least 9 times without significant decrease in activity.

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Synthesis of an optically active intermediate for A-ring of 19-nor-1α,25-dihydroxyvitamin D₃

Shan Qian, Li Hai, Lei Tang, Jin Cheng Yang, Yong Wu

中国化学快报. 2007, 18(03): 261-262. https://doi.org/10.1016/j.cclet.2007.01.025

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An optically active intermediate 5 for A-ring of 19-nor-1α,25-dihydroxyvitamin D₃ 2 has been synthesized in five steps, starting from readily available, inexpensive D(+)-xylose 6 with good yield.

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Synthesis of novel calix[4]crown telomers and selective extraction of cesium ions

Hai Bing Li, Yuan Yin Chen, De Jun Xiong, Jun Yan Zhan, Cui Ping Han

中国化学快报. 2007, 18(03): 263-265. https://doi.org/10.1016/j.cclet.2007.01.011

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p-tert-Butylcalix[4]diazacrown-4 telomer, which contains hard and soft ion binding sites, was synthesized. It exhibited high selectivity toward cesium ions. The binding sites may complex alkali metal ions selectively.

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Knoevenagel condensation catalysed by poly(vinyl chloride) supported tetraethylenepentamine (PVC-TEPA)

Fen Dong, Yi Qun Li, Rong Feng Dai

中国化学快报. 2007, 18(03): 266-268. https://doi.org/10.1016/j.cclet.2007.01.023

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Poly(vinyl chloride) supported tetraethylenepentamine (PVC-TEPA) has been found to be an efficient catalyst for the Knoevenagel condensation. A wide range of aromatic aldehydes easily undergo condensations with ethyl cyanoacetate and malononitrile in the commercial 95% ethanol in refluxing using PVC-TEPA as catalyst to afford the desired products of good purity in moderate to excellent yields. A recycling study confirmed that the catalyst could be reused, the yield of the desired condensation product were not reduced. The merits of this protocol are environmentally benign, simple operation, convenient work-up and good yields. Furthermore, the catalyst can easily be recovered and reused at five times with comparable yields.

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A novel approach for one-step forming ε-caprolactam from cyclohexane nitrozation catalyzed by transition metal salt

Li Qiu Mao, BO Hua Wu, Du Lin Yin, Kui Yi You, Ping Le Liu, He An Luo

中国化学快报. 2007, 18(03): 269-271. https://doi.org/10.1016/j.cclet.2007.01.020

摘要 ( )

可视化

The nitrozation reaction of cyclohexane in one-step reaction to form ε-caprolactam has been studied using transition metal salt as catalysts in this work. The results indicated that the catalysts play an especially important role. This method is expected to be a novel way to synthesize other lactam by similar reaction. The possible mechanism was suggested.

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Microwave-assisted base-free synthesis of trans-cinnamic acids using hypervalent iodonium salts

Min Zhu, Chao Shentu, Zhong Shi Zhou

中国化学快报. 2007, 18(03): 272-274. https://doi.org/10.1016/j.cclet.2007.01.027

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A fast and convenient base-free Heck reaction of acrylic acid with hypervalent iodonium salts was achieved under microwave irradiation in water, providing a simple method for the synthesis of trans-cinnamic acids in good yields in short time.

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The applications of Schiff bases in Ti-catalyzed asymmetric alkynylation of aldehydes

Xian Jia, Lu Yin, Xuan Zhao, Xing Shu Li

中国化学快报. 2007, 18(03): 275-278. https://doi.org/10.1016/j.cclet.2007.01.022

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可视化

Sciff bases 1 and 2, which were derived from chiral aminoalcohols, were used as ligands in Ti-catalyzed asymmetric alkynylation of aldehydes. Good enantioselectivities (up to 88% ee) and high chemical yields (80-90%) were obtained.

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Ionic liquids as efficient phase-transfer catalysts for the solid base-promoted monoalkylation of diethyl malonate

Hui Sun, Juan Li, Xiao Chen Cai, Dong Jiang, Li Yi Dai

中国化学快报. 2007, 18(03): 279-282. https://doi.org/10.1016/j.cclet.2007.01.028

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Ionic liquids (ILs) based on 1,3-dialkylimidazolium and teraalkylammonium cations were employed as a series of efficient,environmentally benign phase-transfer catalysts (PTCs) for the base-promoted monoalkylation of diethyl malonate. The influence of various heterogeneous bases on yields was studied. Good yields and high selectivity were obtained. Solvent-free, mild reaction condition, short reaction time, and easy purification were the merits of this method. The catalytic system (IL-base) could also be recycled after the extraction of products with ether.

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Synthesis and near-infrared characteristics of novel perylene bisimide dyes bay-functionalized with naphthalimide chromophores

Bo Gao, Yang Li, He Tian

中国化学快报. 2007, 18(03): 283-286. https://doi.org/10.1016/j.cclet.2007.01.014

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可视化

Novel perylene bisimide dyes bay-functionalized with naphthalimide chromophores have been prepared conveniently by coupling of 1,8-naphthalimide and dibromoperylene bisimides. Their optical properties were investigated by UV-vis and fluorescence spectroscopy. The absorption spectra of these compounds showed wide spectral responses from 300 to 700 nm,which would be potentials for application as organic solar cells.

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Design and synthesis of novel tweezer anion receptors based on deoxycholic acid

Xing Li Liu, Zhi Gang Zhao, Shu Hua Chen

中国化学快报. 2007, 18(03): 287-290. https://doi.org/10.1016/j.cclet.2007.01.038

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A novel type of molecular tweezer receptors based on deoxycholic acid has been designed and synthesized and their binding properties were examined by UV-vis spectral titration. These molecular tweezers showed a high selectivity toward F^- over Cl^-,Br^-, I^-, AcO^-, H₂PO₄^-.

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A new ellagitannin from Cleidion bracteosum

Peng Ju, Yi Fen Wang, Qiong Wang, Shi De Luo

中国化学快报. 2007, 18(03): 291-292. https://doi.org/10.1016/j.cclet.2007.01.003

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A new ellagitannin, named bractin (1), had been isolated from the dried aerial part of Cleidion bracteosum. Its structure was determined based on various of spectral analysis.

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A new bioactive prenylated dihydroflavanoid from Dolichos tenuicaulis (Baker) Craib

Jin Yong Peng, Hai Yan Liu, Yan Qi, Xu Han, You Wei Xu, Li Na Xu, Qi Wei Xu

中国化学快报. 2007, 18(03): 293-296. https://doi.org/10.1016/j.cclet.2007.01.007

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A new prenylated dihydroflavonoid was obtained from the root of Dolichos tenuicaulis (Baker) Craib. The structure was elucidated as (2S)-5,2',6'-trihydroxy-3''', 8-di (γ, γ-dimethyl-allyl)-2''', 2'''-dimethylpyrano-[5''',6''':6,7]-2''''',4'''''-cyclohexadiene-1'''''-one-[2''''',3''''':3',4']-flavanone, named dolichnin A, by spectroscopic methods including UV, IR, HR-EI-MS, 1D NMR and 2D NMR techniques, and subsequently, the anticancer activity of this compound to inhibit human cancer cells' growth including A549, BEL-7402, Hep-3B, SMMC7721, HT-29, MCF-7, SGC-7902, K562, A498 and PC3 cell lines by MTT method was evaluated in vitro.

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A new isoflavonolignan from Pueraria alopecuroides Craib

Zhen Zhang, Guang Ming Liu, Yue Hu Wang, Chun Shun Li, Yan Li Ren, Huai Xiao, Xiao Jang Hao, Hong Ping He

中国化学快报. 2007, 18(03): 297-299. https://doi.org/10.1016/j.cclet.2007.01.008

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A new isoflavonolignan has been isolated from the Pueraria alopecuroides Craib. The structure was elucidated by the combination of 1D, 2D NMR analysis and mass spectrometry.

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New C₂₁ steroidal glycoside from Cynanchum paniculatum

Jing Dou, Ping Li, Zhi Ming Bi, Jian Liang Zhou

中国化学快报. 2007, 18(03): 300-302. https://doi.org/10.1016/j.cclet.2007.01.013

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A new C₂₁ steroidal glycoside, neocynapanogenin F 3-O-β-D-thevetoside 1, as well as its known aglycone neocynapanogerin F 2, which have an aberrant 13, 14:14, 15-disecopregnane-type skeleton were isolated from the root of Cynanchum paniculatum.Their structures were elucidated on the basis of spectroscopic data analysis. These compounds showed certain cytotoxic activities in vitro.

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A new xanthene from Blumea riparia

Jia Qing Cao, Yao Yao, Huan Chen, Li Qiao, Yu Zhi Zhou, Yue Hu Pei

中国化学快报. 2007, 18(03): 303-305. https://doi.org/10.1016/j.cclet.2007.01.029

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A new xanthene, named blumeaxanthene, was isolated from Blumea riparia DC. The structure was elucidated on the basis of the data of NMR, MS, IR.

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A new triterpenoid saponin from the roots of Platycodon grandiflorum

Wei Li, Lan Xiang, Jing Zhang, Yi Nan Zheng, Li Kun HAN, Masato Saito

中国化学快报. 2007, 18(03): 306-308. https://doi.org/10.1016/j.cclet.2007.01.009

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A new triterpenoid saponin, 3-O-β-D-glucopyranosyl 16-oxo-platycodigenin 28-O-β-D-apiofuranosyl-(1→3)-β-D-xylopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyra-nosyl ester, was isolated from the roots of Platycodon grandiflorum, together with three known saponins, including platycodin D, deapio platycoside E and platycoside E. The structure of the new compound, named 16-oxo-platycodin D, was elucidated on the basis of spectroscopic data.

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Study on the oscillating phenomena of electrical potential across a liquid membrane

Jin Zhang Gao, Hong Xia Dai, Hua Chen, Jie Ren, Wu Yang

中国化学快报. 2007, 18(03): 309-312. https://doi.org/10.1016/j.cclet.2006.12.025

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The electrical oscillations across a liquid membrane in water/oil/water system was studied with octanol as oil phase by introducing two opposite charged surfactants in oil and aqueous phase, respectively. The sustained and rhythmic oscillation was observed. To a certain extent, the features of the oscillation (e.g. induction time, frequency, life time and orientation of the pulse pikes) strongly depend on the property of surfactant, dissolved in octanol. The mechanism may be explained by the formation and destruction of dual-ion surfactant membrane accompanying with emulsification at the interface and considering the coupling effect of diffusion and associated reaction in the vicinity of the interface.

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Predominating stable adsorption and direct electrochemistry of glucose oxidase on carbon nanotubes by oxygen-containing groups

Chun Hai Yang, Cheng Guo Hu, Sheng Shui Hu

中国化学快报. 2007, 18(03): 313-315. https://doi.org/10.1016/j.cclet.2007.01.021

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Stable adsorption and direct electrochemistry of glucose oxidase (GOx) occurred on nitric acid (HNO₃)-treated multi-walled carbon nanotubes (MWNTs) instead of as-received MWNTs, demonstrating the critical roles of oxygen-containing groups in stable adsorption and direct electrochemistry of GOx on carbon nanotubes (CNTs).

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Combination of hollow fiber-based liquid-phase microextraction with sweeping techniques in micellar electrokinetic chromatography for the determination of Strychnos alkaloids in human urine

Xiao Huan Zang, Cai Rui Li, Qiu Hua Wu, Chun Wang, Dan Dan Han, Zhi Wang

中国化学快报. 2007, 18(03): 316-318. https://doi.org/10.1016/j.cclet.2007.01.032

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A new method for the enrichment of Strychnos alkaloids in biological samples via liquid-phase rnicroextraction (LPME) based on porous polypropylene hollow fibers in combination with on-line sweeping in micellar electrokinetic chromatography was developed. The calibration curve was linear over the range of 20-200 ng mL^-1 for both strychnine and brucine in human urine sample. The detection limits (S/N=3:1) for strychnine and brucine were 1 ng mL^-1 and 2 ng mL^-1, respectively. The LPME-sweeping method has been successfully applied to the analysis of strychnine and brucine in real urine samples.

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Determination of vinyl orientation of mouse neuroglobin by 2D nuclear Overhauser spectroscopy

Su Yuan Zhou, Xiao Yan Wei

中国化学快报. 2007, 18(03): 319-321. https://doi.org/10.1016/j.cclet.2007.01.033

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¹H NMR has been used to determine the 2-, 4-vinyl orientation of heme active site from oxidized mouse neuroglobin (mNgb).The NOEs between 3-methyl and H_α, H_β of 2-vinyl, together with the NOEs between 5-methyl and H_α, H_β of 4-vinyl, allowed the unambiguous determination of trans and cis orientations for the 2-and 4-vinyl groups in the mNgb, respectively.

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Chiral separation by (S)-naproxen imprinted monolithic column with mixed functional monomers

Zhen Ying Li, Zhao Sheng Liu, Qing Wei Zhang, Hong Quan Duan

中国化学快报. 2007, 18(03): 322-324. https://doi.org/10.1016/j.cclet.2007.01.037

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Molecularly imprinted polymers (MIPs), using (S)-naproxen as template and the combination of butyl methacrylate (BMA) and MAA (1:1 molar ratio) as functional monomers were synthesized by an in situ polymerization reaction. The rendered monolithic column was evaluated in HPLC mode. The result showed that the monolithic MIPs with the combination of two monomers produced better chiral resolution of rac-naproxen (Rs=1.55) and column efficiencies of imprinted molecules (N=2860 plates/m)than that with pure MAA.

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Novel modified pectin for heavy metal adsorption

Feng Ting Li, Hong Yang, Yan Zhao, Ran Xu

中国化学快报. 2007, 18(03): 325-328. https://doi.org/10.1016/j.cclet.2007.01.034

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Modified pectin cross-linked with adipic acid, was synthesized and used for heavy metal removal from wastewater. SEM and FrIR were used to investigate its structure and morphology. The modified pectin had a rough, porous phase covered with carboxy groups, resulting a high adsorption capacity. And at the room temperature, the saturated loading capacity for Pb²⁺, Cu²⁺ and Zn²⁺ reached 1.82 mmol/g, 1.794 mmol/g and 0.964 mmol/g, respectively. The results proved its potential application to remove of the heavy metal.

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Preparation of Mg-Li alloys by electrolysis in molten salt at low temperature

Mi Lin Zhang, Yong De Yan, Zhi Yao Hou, Lu An Fan, Zeng Chen, Ding Xiang Tang

中国化学快报. 2007, 18(03): 329-332. https://doi.org/10.1016/j.cclet.2007.01.004

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A new technology for preparation of low cost Mg-Li alloys was studied. The alloys were prepared by electrolysis in molten LiCl-KCl (weight ratio is 1:1) electrolyte with Mg rod severing as the consumed cathode. Main factors that affect current efficiency were investigated, and optimal electrolysis parameters were obtained. Mg-Li alloys with low lithium content (about 25%) were prepared by the unique method of a higher post-thermal treatment temperature after electrolysis at low temperature. The results showed that the electrolysis can be carried out at low temperature, which resulted in reducing preparation cost due to energy saving.The new technology for the preparation of Mg-Li alloy by electrolysis in molten salt was proved to be feasible.

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Synthesis and photovoltaic properties of new europium complex Eu(DBM)₃(CPyBM)

Li Ying Zhang, Bin Li, Shu Mei Yue, Wen Lian Li

中国化学快报. 2007, 18(03): 333-336. https://doi.org/10.1016/j.cclet.2007.01.026

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可视化

A new europium(Ⅲ) complex, tris(dibenzoylmethanate){1-[9-hexyl-9-carbazole]-2-(2-pyridyl)-benzimidazole]europium(Ⅲ) [Eu(DBM)₃(CPyBM)] was synthesized and used as an electron-acceptor and electron-transport layer in organic photovoltaic (PV) device. Power conversion efficiency achieved from the device was 1.04% under illumination with 365 nm UV light at 1.6 mW/cm². Compared with the previous reported devices based on Eu(Ⅲ) complexes, the PV performances were improved. The working mechanism of the organic PV device was discussed.

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Synthetic LiFePO₄/C without using inert gas

Guo Rong Hu, Xu Guang Gao, Zhong Dong Peng, Ke Du, Yan Jun Liu

中国化学快报. 2007, 18(03): 337-340. https://doi.org/10.1016/j.cclet.2007.01.006

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可视化

LiFePO₄/C was synthesized by high temperature solid-state method with cheap Fe₂O₃, LiH₂PO₄ and glucose as raw materials in absence of inert gas. The sample had ordered olivine-type structure other impurities characterized by the test of X-ray diffraction(XRD). The charge-discharge test showed the sample could demonstrate 120.5 mAh/g at 0.2C rate with good cyclic capability. The powder microelectrode cyclic voltammetry test indicated that the redox process of the sample had good reversibility.

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Catalytic oxidation of 4-tert-butyltoluene over Ti-MCM-41

Wei Hua Yu, Chun Hui Zhou, Xiang Sheng Xu, Zhong Hua Ge

中国化学快报. 2007, 18(03): 341-344. https://doi.org/10.1016/j.cclet.2006.12.018

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可视化

The surface-grafted titanium MCM-41 materials were prepared by anchoring titanocene onto the inner walls of MCM-41. The materials were characterized by powder X-ray diffraction (XRD), N₂ adsorption-desorption isotherm and diffuse reflectance UV-visible (UV-vis) spectroscopies. The catalytic properties of Ti-MCM-41 were tested in oxidation of 4-tert-butyltoluene with tert-butylhydroperoxide (TBHP) in liquid phase. MCM-41 with loading 4.8 mol% Ti gave the maximal conversions of 23.6% of 4-tert-butyltoluene with a complete selectivity to 4-tert-butylbenzaldehyde.

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Formation of ring calcium oxalate patterns induced by domains in DPPC Langmuir-Blodgett films

Yi Ming Liu, Sui Ping Deng, Hui Zheng, Jian Ming Ouyang

中国化学快报. 2007, 18(03): 345-348. https://doi.org/10.1016/j.cclet.2007.01.016

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可视化

The ring patterns of calcium oxalate crystals were induced by domains in Langmuir-Blodgett (LB) films of dipalmitoylpho-sphatidylcholine (DPPC). The result was explained by the defects at the ring boundaries of liquid condensed (LC) and liquid expanded (LE) phases of LB film. These boundaries could provide less free energy and much more nucleating sites for COM crystals.

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Catalyzed oxidation of 2,6-dimethylphenol in Triton X-100 micellar solution

Jie Zhu, Xiang Guang Meng, Hai Dong Wang, Shan Dong Liu, Qin Hui Pang, Juan Du, Xian Cheng Zeng

中国化学快报. 2007, 18(03): 349-351. https://doi.org/10.1016/j.cclet.2006.12.015

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可视化

The oxidative coupling reaction of 2,6-dimethylphenol with H₂O₂catalyzed by a copper(Ⅱ) Schiff complex in aqueous and Triton X-100 micellar solution under mild conditions was investigated. The kinetics of formation of 3,3',5,5'-tetramethyl-4,4'-diphenoquinone (DPQ) was studied. Rate constant k₂ were obtained. The optimum pH for DPQ generation reaction is 7.25. The main product was DPQ in aqueous buffer solution, but PPE and the oxidized products of PPE remained in Triton X-100 micellar solution.

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Electrokinetic pumping system based on nanochannel membrane for liquid delivery

Ling Xin Chen, Qing Ling Li, Xiao Lei Wang, Hai Long Wang, Ya Feng Guan

中国化学快报. 2007, 18(03): 352-354. https://doi.org/10.1016/j.cclet.2007.01.019

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可视化

Nonmechanical pumping of liquids is of key importance for applications from the biomedical microfluidic chip to drug delivery systems. In this paper, a new electrokinetic pump (EOP) system with polycarbonate nanochannel membrane sandwiched between two membrane holders was constructed. The pump was tested with water and phosphate buffer at 1-6 V applied voltage, the maximum pressure and flow rate are 0.32 MPa (3.2 atm) and 4.2 μL/min for phosphate buffer, respectively. This proof-of-concept pump shows its potential use for drugs or chemical agents delivery by the usage of different membrane materials.

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Effect of arginine on stability of GST-ZNF191(243-368)

Dong Xin Zhao, Zhong Xian Huang

中国化学快报. 2007, 18(03): 355-356. https://doi.org/10.1016/j.cclet.2007.01.017

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可视化

For better understanding the chemical or biological information of ZNF191 (243-368), we expressed the fusion protein of GST and ZNF191(243-368), and used it to obtain the binding DNA sequence of this zinc finger protein. But in the process of expression and purification, we found this fusion protein slowly degradated. For resolving this problem, we simultaneously added charged amino acids L-Arg and L-Glu to the solution of fusion protein, and demonstrated that this method can dramatically increase the stability of this fusion protein. This method can make the fusion protein suitable for the continuous works, especially for situations where high protein concentration and long-term stability without precipitate and degradation of protein are required.

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Molecular dynamics studies of the inhibitory mechanism of copper(Ⅱ) on aggregation of amyloid β-peptide

Yong Jiao, Pin Yang

中国化学快报. 2007, 18(03): 357-360. https://doi.org/10.1016/j.cclet.2006.12.028

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可视化

The inhibitory mechanism of copper(Ⅱ) on the aggregation of amyloid β-peptide (Aβ) was investigated by molecular dynamics simulations. The binding mode of copper(Ⅱ) with Aβ is characterized by the imidazole nitrogen atom, Nπ, of the histidine residue H13,acting as the anchoring site, and the backbone's deprotoned amide nitrogen atoms as the main binding sites. Drove by the coordination bonds and their induced hydrogen bond net, the conformations of Aβ converted from β-sheet non-β-sheet conformations, which destabilized the aggregation of Aβ into fibrils.

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Covalent modification of multiwalled carbon nanotubes with a low molecular weight chitosan

Gang Ke, Wen Chao Guan, Chang Yu Tang, Zhen Hu, Wen Jie Guan, Dan Lin Zeng, Feng Deng

中国化学快报. 2007, 18(03): 361-364. https://doi.org/10.1016/j.cclet.2007.01.010

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Covalent modification of shortened multiwalled carbon nanotubes (MWNTs) with a natural low molecular weight chitosan (LMCS) was accomplished by the nucleophilic substitution reaction. The LMCS modified MWNTs (MWNT-LMCS) were characterized by FTIR, solid-state ¹³C NMR, and XPS spectroscopies, thermogravimetric analysis, and transmission electron microscopy. The results revealed that amino and primary hydroxyl groups of the LMCS participated mainly in the formation of the MWNT-LMCS conjugates. The MWNT-LMCS consists of 58 wt.% LMCS, and about four molecular chains of the LMCS were attached to 1000 carbon atoms of the nanotube sidewalls. As a novel derivative of the MWNTs, the MWNT-LMCS not only solved in DMF, DMAc and DMSO, but also in aqueous acetic acid solution.

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New approach to fabricate nanoporous gold film

Hui Zhou, Lan Jin, Wei Xu

中国化学快报. 2007, 18(03): 365-368. https://doi.org/10.1016/j.cclet.2007.01.001

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可视化

A simple preparation of ultrathin nanoporous gold film was described. Copper and gold were used to fabricate Cu-Au alloy films through vacuum deposition. The formation of nanoporous gold films from the alloy films involved thermal process and chemical etch by hydrochloric acid or by nitric acid. The free-standing nanoporous gold films have been analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectrometer (XPS) and surface-enhanced Raman scattering (SERS). It was noted that the nanoporous gold film etched by hydrochloric acid is uniform with a cover of fog-like moieties.

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Studies on fluorenscence resonance energy transfer between CdS nanoparticles and DOCAI dyes

Lun Wang, Yan Liu, Hong Qi Chen, A Ni Liang, Fa Gong Xu

中国化学快报. 2007, 18(03): 369-372. https://doi.org/10.1016/j.cclet.2007.01.002

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可视化

The water-soluble CdS nanoparticles were synthesized in aqueous solution. A novel fluorescence resonance energy transfer(FRET) system with CdS nanoparticles as energy donors and 3,3'-diethyl-oxadicarbocyanine iodide (DOCAI) dyes as energy accepter has been developed.

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2007年, 第18卷, 第03期　刊出日期：2007-03-20

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2007年, 第18卷, 第03期 刊出日期：2007-03-20

2007年, 第18卷, 第03期　刊出日期：2007-03-20