Chinese︱Feedback︱Save this page

Login︱Register

• Elaborating Academic Views 　　　　 • Exchanging Innovative Ideas
• Protecting Intellectual Properties 　　• Fast Sharing Science Papers

Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China

Home > Papers > Chemistry

There are 79 papers published in subject: since this site started.

Results per page:

79 Total, 8 Pages | << First < Previous 1 2 3 4 5 6 7 Next > Last >>

Select Subject

All (8830)

Agronomy (158)

Animal Husbandry,... (64)

Aquatic Science (16)

Astronomy (36)

Aviation (22)

Basic Medicine (184)

Biology (504)

Chemical Engineering (103)

Chemistry (635)

Civil and Archite... (105)

Clinical Medicine (236)

Computer Science ... (924)

Dynamic and Elect... (121)

Earth Science (119)

Economics (67)

Education (31)

Electrics, Commun... (927)

Energy Science an... (67)

Engineering and T... (15)

Environmental Sci... (140)

Food Science and ... (63)

Forestry (36)

Hydraulic Enginee... (40)

Mechanics (240)

Metallurgical Eng... (32)

Mine Engineering ... (38)

Nuclear Science a... (21)

Pharmacy (98)

Physics (920)

Preventive Medici... (37)

Psychology (20)

Security Science ... (17)

Sports Science (6)

Surveying and Map... (15)

Textile Science a... (16)

Traditional Chine... (56)

Transportation En... (57)

Second-level Subject

Analytical Chemistry(112)
Applied Chemistry (Specif...(23)
Chemical Physics(2)
History of Chemistry(0)
Nuclear Chemistry(0)
Organic Chemistry(132)
Other Subjects of Chemistry(7)
Physical Chemistry(172)
Polymer Chemistry(64)
Polymer Physics(12)

Rank

Results per page:

79 Total, 8 Pages | << First < Previous 1 2 3 4 5 6 7 Next > Last >>

Alert Name:
Alerting to:
Authentication email will be sent to your email address in 24 hours
Frequency:
Email Message Format:	Plain text Graphical(HTML)

Complete the form below and we will recommend the selected titles to your friends on your behalf. * Indicates a required field.
Your name*:
Your email address*:
Recipient's name*:
Recipient's email address*:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find the page(s) useful.

Your name:
Your email address:
Recipient's name:
Recipient's email address:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find this page useful.

Disclaimer: This message was sent to your friend using the "Send it to a friend" facility on the Sciencepaper Online’ WWW site, http://www.paper.edu.cn/en. The Sciencepaper Online is not responsible for the content of this email, and anything said in this email does not necessarily reflect the Sciencepaper Online's views.


	1. Phase separation and crystallization of binary nanoparticles induced by polymer brushes
	ZHANG Dong,ZHANG Linxi
	Chemistry 10 December 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:The aggregation behaviors and phase separation of binary nanoparticles in semiflexible polymer brushes are explored by using molecular dynamics simulations. The conformations of the binary nanoparticles/brushes mixtures are very sensitive to the size ratio of nanoparticles and the attractive interactions between nanoparticles and polymer brushes. The phase separation of the binary nanoparticles is observed at a relatively strong attractive interaction under the effect of inter-nanoparticle depletion attractions provided by polymer brushes. Furthermore, the crystallization of small nanoparticles occurs at a strong interaction and a hexagonal close-packed-like (hcp-like) ordered structure is formed. The present results may promise a new approach for controlling the self-assembling behavior of nanoparticles and constructing a better macroscopic performance of the material.
	TO cite this article:ZHANG Dong,ZHANG Linxi. Phase separation and crystallization of binary nanoparticles induced by polymer brushes[OL].[10 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4500547


	2. Synthesis of ZnO Nanotower Controlled by Reagent's Vapor Pressure
	YAN Youguo,CHEN Haixiang,WANG Xiao,CAO Xuhui,ZHOU Lixia,ZHANG Jun
	Chemistry 04 December 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:In this paper, ZnO nanotower with layer-by-layer structure was well prepared using Zn as source at 700℃ via chemical vapor deposition method. In the growth process, the Zn vapor pressure was considered as crucial factor determining the growth behavior of reagent's species, and a competitive model between axial and lateral growth controlled by Zn vapor pressure was proposed to explain the formation of tower-shaped structure. Several other experiments were conducted to analyze the growth behavior under different Zn vapor pressure. Experimental results indicated that the decreasing Zn vapor pressure was responsible for the formation of layer-by-layer structure. High Zn vapor pressure would induce to formation of nanotower with large diameter and thin layer, and low Zn vapor pressure would result in formation of nanotower with small diameter and thick layer. These experimental results further confirmed the competitive growth model. Our growth analyses were helpful in understanding microcosmic growth behavior of reagent's species, which contributed to realize controlled growth of complex nanostructures in vapor route. Furthermore, these obtained nanotowers might have potential applications as functional blocks in future nanodevices.
	TO cite this article:YAN Youguo,CHEN Haixiang,WANG Xiao, et al. Synthesis of ZnO Nanotower Controlled by Reagent's Vapor Pressure[OL].[ 4 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4499267

Saved Papers

Saved Papers


	3. Green Synthesis of Metal Nanoparticles by Sesbania Gum
	FENG Xuejiao,XU Shuping,XU Weiqing
	Chemistry 06 November 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:A green and environment-friendly method for synthesis of metal nanoparticles (NPs) was presented. Sesbania gum (SG) as a reducing and stabilizing reagent was first employed to prepare metal NPs. Through solvent evaporating of the Ag NP contained solution, a stable metal NP embedded membrane was obtained. Fourier transform infrared (FT-IR) and Raman spectroscopies were employed to insight into the interaction between metal NPs and SG in membrane. Interestingly, the dried metal NP embedded membrane can be redissolved into water to form a homogeneous Ag colloid according to the protection of SG. This study provides a green and low cost approach for synthesis of metal NPs. The existence of this metal NP embedded membrane makes the conservation and transportation of NPs become easy and facile.
	TO cite this article:FENG Xuejiao,XU Shuping,XU Weiqing. Green Synthesis of Metal Nanoparticles by Sesbania Gum[OL].[ 6 November 2012] http://en.paper.edu.cn/en_releasepaper/content/4494459


	4. Inorganic-Salt-Induced Morphological Transformation of Semicrystalline Micelles of PCL-b-PEO Block Copolymer in Aqueous Solution
	HE Wei-na,XU Jun-ting
	Chemistry 25 September 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:The effect of inorganic salt at concentrations typical of a biological environment on the Micellar morphology of semicrystalline PCL-b-PEO in aqueous solution is investigated. The salt is introduced either by dialysis of a THF solution against an aqueous solution of the salt or by adding it into an aqueous solution containing preformed micelles. The inorganic salt can induce sphere-to-rod or sphere-to-lamella transformations of the PCL-b-PEO micelles in aqueous solution, affected by the length of the PCL block, the method of salt-adding and the concentration of inorganic salts. The inorganic salt induces ''salting-out'' of the PEO block, leading to a decrease in the reduced tethering density of the corona in the micelles.
	TO cite this article:HE Wei-na,XU Jun-ting. Inorganic-Salt-Induced Morphological Transformation of Semicrystalline Micelles of PCL-b-PEO Block Copolymer in Aqueous Solution[OL].[25 September 2012] http://en.paper.edu.cn/en_releasepaper/content/4490188


	5. Mechanism Analysis for Catalytic Synthesis of 4-quinolones Derivatives by Eaton's reagent
	Liu Tianyu,Qiao Yuanyuan
	Chemistry 28 July 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:For its impressive antibiotic activity, Eaton's reagent has been extensively used to catalyze the synthesis of 4-quinolone derivatives, but the mechanism behind the reaction is still not clear till now. In this paper, a possible mechanism for this reaction is revealed by using the density functional theory (DFT) method, which is consistent with the experimental phenomenon, and the existing main and side reactions are also explained successfully.
	TO cite this article:Liu Tianyu,Qiao Yuanyuan. Mechanism Analysis for Catalytic Synthesis of 4-quinolones Derivatives by Eaton's reagent[OL].[28 July 2012] http://en.paper.edu.cn/en_releasepaper/content/4485283


	6. Total Synthesis of threo-(2S,3R)-3-(4-Hydroxy-3,5-dimethoxyphenyl)-3-ethoxypropane-1,2-diol
	XIA Yamu,LIU Haixin,DAI Xiaoli
	Chemistry 25 July 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Ficus beecheyana's rhizomes have long been used as a folk medicine to treat rheumatism and diabetes. threo-(2S,3R)-3-(4-Hydroxy-3,5-dimethoxyphenyl)-3-ethoxypropane-1,2-diol was isolated from the roots of this plant. In the paper, the asymmetric synthesis of threo-(2S,3R)-3-(4-Hydroxy-3,5- dimethoxyphenyl)-3-ethoxypropane-1,2-diol was reported for the first time, and based on the asymmetric dihydroxylation as a key reaction. The target compound was obtained through six steps.
	TO cite this article:XIA Yamu,LIU Haixin,DAI Xiaoli. Total Synthesis of threo-(2S,3R)-3-(4-Hydroxy-3,5-dimethoxyphenyl)-3-ethoxypropane-1,2-diol[OL].[25 July 2012] http://en.paper.edu.cn/en_releasepaper/content/4485197


	7. Synthesis of polyhalo 2-aryl-4-aminoquinazolines and 3-amino-1H-indazoles as anticancer agents
	Yan Shengjiao,Dong Ying,Peng Qiong,Fan Yingxian,He Nengqin,Zhang Jihong,Lin Jun
	Chemistry 29 March 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:A series of polyhalo 2-aryl-4-aminoquinazolines 3a~3n were prepared by reacting polyhalo isophthalonitriles 1a~1c with amidine hydrochlorides under basic conditions with good yields (70~93%). Similarly, through the reaction of polyhalo isophthalonitriles 1a~1c with hydrazines to give some novel polyhalo 3-aminoindazoles 5 and 7 with moderate yield (70~87%). The anticancer activities of compounds 3, 5 and 7 were evaluated in vitro against human cell lines SkOV-3, HeLa, U2-OS, A549, and MCF-7. Some compounds showed excellent growth inhibitory activity and 3a was found to be the most potent active molecular, with an IC50 value lower than 3.86 μg/mL against the five tumor cell lines.
	TO cite this article:Yan Shengjiao,Dong Ying,Peng Qiong, et al. Synthesis of polyhalo 2-aryl-4-aminoquinazolines and 3-amino-1H-indazoles as anticancer agents[OL].[29 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4473518


	8. Enol functionalized N-heterocyclic carbene lanthanide amide complexes: synthesis, molecular structures and catalytic activity for addition of amines to carbodiimides
	LI Zhi,SHEN Qi
	Chemistry 13 March 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Reaction of anhydrous LnCl3 (Ln = Y, Nd, Sm and Yb) with enol-functionalized imidazolium salt H2LBr (L= 4-OMe-C6H4COCH{C(NCHCHNiPr)}) and NaN(TMS)2 at a molar ratio of 1:4:1 in THF at room temperature afforded the corresponding novel enol-functionalized N-heterocyclic carbene (NHC) lanthanide amides L2LnN(TMS)2 (Ln = Y (1), Nd (2), Sm (3), Yb (4)) in 37-40% yields. Molecular structures of complexes 1-4 were determined by X-ray structure analyses. All these complexes adopt monomeric structures where each 5-coordinated metal is coordinated by two NHC ligands and one amido group.in distorted trigonal bipyramid geometry. These complexes, especially the Yb complex 4 were found to be highly active precatalysts for the catalytic addition of amines to carbodiimides giving guanidines, Complex 4 shows good functional group tolerance and a wide scope of amines including primary and secondary cyclic amines.
	TO cite this article:LI Zhi,SHEN Qi. Enol functionalized N-heterocyclic carbene lanthanide amide complexes: synthesis, molecular structures and catalytic activity for addition of amines to carbodiimides[OL].[13 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4470927


	9. TiO2 nanorods with exposed {100} facet and their photocatalytic properties
	Wang Changhua,Zhang Xintong,Zhang Yanli,Yuan Bo,Yang Jikai,Sun Panpan,Liu Yichun
	Chemistry 28 February 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Anatase TiO2 nanorods with exposed {100} facets were prepared by employing simple NaCl assisted hydrothermal technique from hydrogen titanate nanosheet precursor. The structural characteristics and formation mechanism of the anatase TiO2 nanorods was deduced from XRD, SEM and TEM characterizations, which revealed that formation of TiO2 nanorods were derived from a combined effect of phase transition retard from hydrogen tiantate to anatase TiO2 induced by Na ion and selective adsorption of Cl ion on the{100} facets of anatase TiO2 crystals. Photocatalytic performance indicated that the TiO2 nanorods with high-energy {100} facet exposure exhibit much higher activities than that of rhombic nanoparticles with low-energy {101} facet exposure for the degradation of organic contaminants.
	TO cite this article:Wang Changhua,Zhang Xintong,Zhang Yanli, et al. TiO2 nanorods with exposed {100} facet and their photocatalytic properties[OL].[28 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4468861


	10. Cooperation of π-π Interaction and Template Effect in Ionothermal Synthesis of Multi-Dimensional Manganese Naphthalene-1,4- Dicarboxylate Compounds
	Huang Lin-Na,Meng Yan,Liu Jun-Liang,Tong Ming-Liang,Lin Zhuojia
	Chemistry 27 February 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Two layered manganese naphthalene-1,4-dicarboxylate compounds based on the paddle-wheel Mn2(COO)4 motifs, (EMIm)[Mn(ndc)Br] and (HMIm)[Mn(ndc)Br], and two three-dimensional networks (RMIm)[Mn2(ndc)2(OAc)] (RMIm = BMIm and HMIm ) were prepared from various ionic liquids. Significant relationship of π-π interactions and template effect are found between the naphthalene part of organic ligands and IL imidazolium rings
	TO cite this article:Huang Lin-Na,Meng Yan,Liu Jun-Liang, et al. Cooperation of π-π Interaction and Template Effect in Ionothermal Synthesis of Multi-Dimensional Manganese Naphthalene-1,4- Dicarboxylate Compounds[OL].[27 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4467109

	Check out RSS, or use RSS reader to subscribe this item