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	1. Preparation and characterization polyimide/single-walled carbon nanotubes composites through π-π stacking
	CHEN Xiangyu,YANG Fengchun,ZHANG Xin
	Chemistry 06 February 2015
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	Abstract:Planar aromatic molecule could be adsorbed by single-walled carbon nanotubes (SWNTs) through their π-π stacking effect. In this work, we used this principle to prepare a homogenized single-walled carbon nanotube solution using Naphthalene-1,4,5,8-tetracarboxylic Dianhydride (NTDA), which is a planar aromatic molecule, as a dispersion agent. Then the nanotube solution reacted with an amine-end low molecule weight polyimide to make composite films. Since the π-π stacking effect is not a directly chemical reaction between carbon nanotubes and planar aromatic molecule, the structure of nanotubes could be perfectly maintained without defects, and bring the excellent electrolytic property into full play. The resulting strong and ?exible polyimide/ SWNTs composite films exhibited good electric conductivity, the resistivity of composites ?lms could reach the range of 5.0×105 Ω/cm2 ~ 2.5×104Ω/cm2. Besides that, due to the optimized adsorption configurations of NTDA on SWNTs, the mechanical properties have also been developed.
	TO cite this article:CHEN Xiangyu,YANG Fengchun,ZHANG Xin. Preparation and characterization polyimide/single-walled carbon nanotubes composites through π-π stacking[OL].[ 6 February 2015] http://en.paper.edu.cn/en_releasepaper/content/4630279


	2. Linear PEI-based Charge-reversal Drug Conjugate for Targeted Cancer Cell Nuclear Drug Delivery
	ZHOU Zhuxian,TANG Jianbin,SHEN Youqing
	Chemistry 21 December 2014
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	Abstract:Many cancer chemotherapy drugs target nuclear DNA to cause DNA damage and/or topoisomerase inhibition to induce cell death (apoptosis). Endocytosis is the primary route to delivery these drugs, which results in their accumulation in the endosomal-lysosomal trafficking pathway and loss of therapeutic activity. Thus, delivering such drugs directly to the nucleus would avoid the lysosomal accumulation and increase the drug efficiency. The cationic polymer linear PEI is capable of nuclear localization by 'Proton-Sponge Effect' (PSE), but its positive charge make it toxic and cannot be used in vivo. In this article, linear PEI is used to demonstrate a pH triggered charge-reversal carrier to solve this problem. The imines are amidized by masking of a lysosomal-pH-active agent. At neutral pH, the imine groups in the LPEI are covalently amidized with anhydride, thereby the polymer was masked by negative charge and inhibited of the membrane disruption activity. Under, acidic conditions such as those present within endosomes or lysosomes, the amide bond of them is cleaved, thus unmasking LPEI. The positively charged LPEI can then disrupt the endosomal membrane by PSE and resulting in delivery the drug into the cytoplasm and nuclei.
	TO cite this article:ZHOU Zhuxian,TANG Jianbin,SHEN Youqing. Linear PEI-based Charge-reversal Drug Conjugate for Targeted Cancer Cell Nuclear Drug Delivery[J].

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	3. <Preparation and adsorption properties of the chelatingelectrospun PAN nanofibers with ammine groups>
	XU Xiuru,LI Xiang,ZHAO Rui,WANG Ce
	Chemistry 08 December 2014
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	Abstract:Polyacrylonitrile (PAN) nanofibers have been fabricated via electrospinning technique. Then an aminated chelating PAN nanofiber (APAN nfs) with high adsorption capacity for copper and dichromate ions have been prepared by a one-step reaction between the PAN nanofibers and diethylenetriamine (DETA). The morphology, structure of the as-prepared chelating nanofibers are characterized by scanning electron microscopy (SEM), FT-IR spectroscopy, respectively. The as-prepared chelating nanofibers show high metal removal properties, such as the maximum removal capacity of copper ion is 137.83 mg/g and dichromate ions are 156.25 mg/g. The adsorption mechanism of copper and dichromate ions have also been discussed in this work.
	TO cite this article:XU Xiuru,LI Xiang,ZHAO Rui, et al. <Preparation and adsorption properties of the chelatingelectrospun PAN nanofibers with ammine groups>[OL].[ 8 December 2014] http://en.paper.edu.cn/en_releasepaper/content/4621872


	4. The Design, Synthesis and Properties of Ionic Liquid Crystal Polymers Based on “Jacketing” Effect
	Weng Liang,Xie He-lou,Yan Jiaojiao,Zhong Guanqun,Zhang Hailiang
	Chemistry 30 August 2014
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	Abstract:In this work, we designed and successfully synthesized a series of novel ionic liquid crystal polymers (ILCPs) poly(2,5-bis{[4-(4-butoxy-4′-imidazolium biphenyl) butyl] oxy carbonyl} styrene salts) [denoted as poly(BImBBCS-X) (Xˉ=Brˉ, BF4ˉ, PF6ˉ and TFSIˉ)] with imidazolium and different counter-anions via radical polymerization based on "Jacketing"effect. Combined nuclear magnetic resonance spectroscopy (NMR) and fourier transform infrared spectroscopy (FT-IR), the chemical structures of the monomers and the corresponding polymers were confirmed. Thermogravimetric analysis (TGA) results indicated that the nature of counter-anions had an important effect on the thermal stability of ILCPs. The experiments of differential scanning calorimetry (DSC) and polarized light microscopy (PLM) were performed to investigate the phase transitions and liquid crystalline behaviors of polymers. The results showed that except for poly(BImBBCS-TFSI) other ILCPs could form liquid crystalline ordered structures due to the strong interaction between the ions. For poly(BImBBCS-TFSI), the large volume of anion TFSIˉ destroyed the packing of LC ordered structure. Obviously, the insertion of ions had an important effect on the constructing of LC ordered structure.
	TO cite this article:Weng Liang,Xie He-lou,Yan Jiaojiao, et al. The Design, Synthesis and Properties of Ionic Liquid Crystal Polymers Based on “Jacketing” Effect[OL].[30 August 2014] http://en.paper.edu.cn/en_releasepaper/content/4605229


	5. Lewis-acids assisted living ROMP of trans-2,3-dicyanonorborn-5-ene
	FENG Lu,ZHANG Yanwu
	Chemistry 21 May 2014
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	Abstract:The 2nd generation Grubbs catalyst (G2), containing N-heterocyclic carbene ligand, exhibits higher activity and functional group tolerance than the 1st generation in the olefin metathesis reaction. However, the olefin metathesis reaction of compounds containing nitrile groups is still challenging due to strong coordination effect between Ru center and nitrile groups. Herein, the living ring-opening metathesis polymerization (ROMP) of trans-2, 3-dicyanonorborn-5-ene initialized by G2 is investigated in the presence of Lewis-acids. Considering the similarity of outermost orbital electrons, Fe2+ and Fe3+ of different Lewis acidity are chosen to overcome the coordination between Ru2+ and nitrile groups. The results of GPC and 1H NMR characterization show that ROMP of trans-2, 3-dicyanonorborn-5-ene can be accomplished in a relatively short period of time with a lower PDI (< 1.5), but the monomer conversion is very low. When Lewis acids are added, the monomer conversion is significantly improved and Fe3+ is preferable to Fe2+ for increasing the monomer conversion.
	TO cite this article:FENG Lu,ZHANG Yanwu. Lewis-acids assisted living ROMP of trans-2,3-dicyanonorborn-5-ene[OL].[21 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4597972


	6. Remarkable Structure Effects on Thermoresponsive Properties of Dendritic Macromolecules
	TAO Xiong,LI Wen,ZHANG Afang
	Chemistry 07 May 2014
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	Abstract:Amphiphilic dendritic macromonomers and their corresponding dendronized polymers were synthesized, and their thermoresponsive properties investigated. These dendritic macromolecules are constructed with a second generation lysine-based dendron as the interior (hydrophobic part) and oligoethylene glycol (OEG) linear chains or dendrons (hydrophilic part) covered in their periphery. By changing from OEG linear chains to OEG dendrons, these dendritic macromolecules carry different density of OEG moieties on their periphery for investigating the structural effects on their thermoresponsiveness. Topology of dendritic macromolecules changes through polymerization, and the fan-shapped dendritic macromonomers transfer into the corresponding cylindrically shapped dendronized polymers. Furthermore, the amphiphilic characteristic of these dendritic entities can be switched due to the thermally-induced dehydration of the OEG moieties. It was found that topology, OEG density in the periphery and switchable amphiphilicity of these dendritic macromolecules show significantly effects on their thermoresponsiveness.
	TO cite this article:TAO Xiong,LI Wen,ZHANG Afang. Remarkable Structure Effects on Thermoresponsive Properties of Dendritic Macromolecules[OL].[ 7 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4596145


	7. Toward modulation on the naphthopyran photochromism: a miniemulsion copolymerization strategy
	Guang Wang,Dehua Li
	Chemistry 24 February 2014
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	Abstract:Novel naphthopyran derivatives based photochromic polymer nanoparticles are prepared via miniemulsion copolymerization with methyl methacrylate (MMA) and n-butyl methacrylate (BMA) monomers. The systematic modulation of photochromic rate can be achieved via tuning the ratio of MMA and BMA monomers to lead the naphthopyrans to swing between rigid and soft surroundings. Transmission electron micrographs (TEM) and dynamic light scattering (DLS) images prove that the nanoparticles are discrete and smooth. The typical spectral characteristics of naphthopyran from the polymer nanoparticles indicate that the photochrome is incorporated into the nanoparticles successfully. In addition, the polymer nanoparticles exhibit good photochromic reversibility and stability upon UV irradiation and thermal back reaction.
	TO cite this article:Guang Wang,Dehua Li. Toward modulation on the naphthopyran photochromism: a miniemulsion copolymerization strategy[OL].[24 February 2014] http://en.paper.edu.cn/en_releasepaper/content/4587104


	8. Hydrothermal synthesis of PEG-capped ZnS:Mn2+ quantum dots
	Yingnan Zhang,DongJiang,Yanmei Ma,He Zhi,Haibo Zhang,ZhenHua Jiang
	Chemistry 29 November 2013
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	Abstract:The water-soluble Mn2+-doped ZnS nanocrystals surface capped with poly ethylene glycol (expressed as PEG-ZnS:Mn2+) were synthesized in aqueous solution by using PEG as surface modifier without ligand exchange for the first time. The particles were obtained using chemical precipitation method at 100 C with an average diameter of 4 nm and a zinc blende structure. The PEG modified on the surface of PEG-ZnS:Mn2+ nanocrystals renders the nanocrystals water soluble and biocompatible. And the PEG-ZnS:Mn2+ nanocrystals have the potential applications in molecular assembly and biological fluorescence analysis. The effects of the Mn2+ concentration, stabilizer concentration, and synthesis time on the photoluminescence (PL) intensity of ZnS:Mn2+ QDs are also investigated.
	TO cite this article:Yingnan Zhang,DongJiang,Yanmei Ma, et al. Hydrothermal synthesis of PEG-capped ZnS:Mn2+ quantum dots[OL].[29 November 2013] http://en.paper.edu.cn/en_releasepaper/content/4571442


	9. Synthesis, characteristics and adsorption properties of polyphenylene sulfide based strong acid ion exchange fiber
	Dengke Zhang,Huajie Yao,Dongju Zhou,Libo Dai,Jie Zhang,Siguo Yuan
	Chemistry 18 November 2013
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	Abstract:A novel strong acid ion exchange fiber (HO3S-BC-XDC-PPS) was prepared via crosslinking and grafting copolymerization of 1,4-bischloromenthyl benzene (XDC), benzyl chloride (BC) on polyphenylene sulfide (PPS) matrix, as well as following sulfonation reaction. The physicochemical structures and properties of the fibrous ion exchange materials were characterized with FT-IR, SEM, TGA, element analysis and chemical titration, respectively. Compared with the preparation of traditional PP-ST-DVB based ion exchange fibers, the syntheses strategy of PPS based strong acid ion exchange fiber avoided the complicated irradiation grafting process with 60Co or other radiation facilities. Owing to the existing of thioether (Ar-S-Ar) and sulfoxide (-SO-) unit in fibrous matrix, a super-equivalent adsorption phenomenon for Cu(II) ion was observed. The HO3S-BC-XDC-PPS fiber possessed high exchange capacity (about 3.70mmol/g), excellent heat stabilities, and the exchange capacity and desorption rate were not decreased after six adsorption desorption cycles.
	TO cite this article:Dengke Zhang,Huajie Yao,Dongju Zhou, et al. Synthesis, characteristics and adsorption properties of polyphenylene sulfide based strong acid ion exchange fiber[OL].[18 November 2013] http://en.paper.edu.cn/en_releasepaper/content/4569939


	10. Dissolution and regeneration of cellulose in a functionalized ionic liquid 1-(2-chloroethyl)-3-methyl imidazolium chloride
	HUANG Mingming,CHEN Feiran,MA Hao,ZHOU Bo,LI Yiqun
	Chemistry 15 April 2013
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	Abstract:Functionalized ionic liquid 1-(2-chloroethyl)-3-methylimidazolium chloride ([ClC2MIM]Cl) used as the powerful and nonderivatizing solvent for dissolution and regeneration of cellulose is reported here. Microcrystalline cellulose can be dissolved in this functionalized ionic liquid without activation or pretreatment with the dissolubility of 20% at 100?C by conventional heating. Cellulose can be easily regenerated from its ionic liquid solutions by addition of deionized water. After its regeneration, the ionic liquids can be recovered and reused. The regenerated cellulose was characterized by XRD, FT-IR, TGA and SEM. The XRD, FT-IR indicated that the regenerated cellulose has the same chemical structure with the initial one. But the SEM shows the morphology of regenerated cellulose is significantly changed from its microfibrils to relatively homogeneous amorphous microstructures. The TGA exhibited that the regenerated sample has a lower onset temperature at 242.4?C for decomposition and gives a higher residual masses after the decomposition step. The possible mechanism of the dissolution of cellulose in [ClC2MIM]Cl is also discussed in this paper. Therefore, this research has shown that ionic liquid [ClC2MIM]Cl can be used as nonderivatizing solvents for cellulose.
	TO cite this article:HUANG Mingming,CHEN Feiran,MA Hao, et al. Dissolution and regeneration of cellulose in a functionalized ionic liquid 1-(2-chloroethyl)-3-methyl imidazolium chloride[OL].[15 April 2013] http://en.paper.edu.cn/en_releasepaper/content/4538016

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