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Chinese Journal of Structural Chemistry 2006年第8期25卷 957-964页

作者： JIANG Ning-Yi li song-lin Department of Chemistry College of Science Tianjin University Tianjin 300072 China

A new double betaine 1,1′-（propane-1,3-diyl）dipyridinium-4-carboxylate L has been synthesized. Reaction of 1, 1′-（propane-1,3-diyl）dipyridinium-4-carboxylate tetrahydrate 1 with Co（ClO4）2-6H2O leads to the formation of a new Co（Ⅱ） coordination compound, namely [Co（H2O）6]-2H2O-2L-2ClO4 2. The crystal structures of 1 and 2 have been determined by single-crystal X-ray diffraction method. Crystal data for 1. monoclinic, space group C2/c, a = 18.945（4）, b = 7.700（2）, c = l 1.888（2）A,β = 101.67（3）°, V = 1698.3（6） A^3, Z = 4, F（000） = 760.0, Dc = 1.402 g/cm^3, the final R = 0.0607 and wR = 0.1607 for 950 observed reflections （1 〉 2σ（I））; and those for 2： monoclinic, space group P21/c, a = 17.982（1）, b = 15.879 （1）, c = 7.0716（5）/A,β= 100.675（1）°, V= 1984.3（3） ,A^3 Z= 4, F（000） = 1010.0, Dc = 1.631 g/cm^3, the final R = 0.0316 and wR = 0.0896 for 3784 observed reflections （1 〉20（I））. Crystal structure analysis indicates that in 1, molecules of L in a ＂V-shaped＂ conformation are linked to chains sustained by O-H…O hydrogen bonds between carboxylate groups and solvent water molecules. The chains are joined by O-H…O and C-H…O hydrogen bonds to further expand into a three-dimensional structure. For 2, molecules of L in a ＂Z-shaped＂ conformation are linked by hydrogen bonds between carboxylate groups and aqua ligands to form a chain of loops running down the b axis. The （2D→2D） polythreading in compound 2 represents the mode of parallel interpenetration of 2D sheets, having polyrotaxane character.

关键词： 1,1′-(propane-1,3-diyl)dipyridinium-4-carboxylate polyrotaxane hydrogen bonding betaine derivative

Characterization and Crystal Structures of Two Copper(Ⅱ) Complexes Constructed by a Flexible Double Betaine ligand

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Chinese Journal of Structural Chemistry 2007年第2期26卷 199-205页

作者： JIANG Ning-Yi li song-lin Department of Chemistry College of Science Tianjin University Tianjin 300072 China

A flexible double betaine 1,4-bis（pyridinil-4-carboxylato）-1,4-dimethylbenzene L has been used to generate two Cu（Ⅱ）-containing metal complexes that exhibit different polymeric structures： [Cu（H2O）2 L].2NO3 1 and [Cu（H2O）3 L].2Cl.H2O 2. The crystal structures of 1 and 2 have been determined by single-crystal X-ray diffraction method. Crystal data for 1： triclinic, space group PT, a = 5.253（2）, b = 7.406（3）, c = 14.792（5） A, α = 84.195（5）, β = 80.014（5）, γ = 78.053（5）°, V= 553.2（3）A^3, Z = 1, F（000） = 293, Dc = 1.717 g/cm^3, the final R = 0.0385 and wR = 0.1079 for 1883 observed reflections （I 〉 2σ（I））; and those for 2： monoclinic, space group P21/c, a = 10.222（3）, b = 25.287（7）, c = 9.277（3）A, β = 93.572（5）°, V = 2393.2（12）A^3, Z = 4, F（000） = 1140, Dc = 1.540 g/cm^3, the final R = 0.0472 and wR = 0.0956 for 3204 observed reflections （I 〉2o（/））.

关键词： 1,4-bis(pyridinio-4-earboxylato)-l,4-dimethylbenzene copper(Ⅱ) complex double betaine

Sludge reduction with Tubificidae and the impact on the performance of the wastewater treatment process

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Journal of Environmental Sciences 2007年第3期19卷 257-263页

作者： GUO Xue-song liU Jun-xin WEI Yuan-song li lin Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

To reduce excess sludge, a Tubificidae reactor was combined with an integrated oxidation ditch with vertical circle （IODVC）, and a new integrated system was developed for wastewater treatment, A pilot-scale of this integrated system was tested to investigate the sludge reduction with Tubificidae and the impact on effluent quality and sludge production. The dominant worm was Branchnria Sowerbyi in the Tubificidae reactor after inoculation of Branchnria Sowerbyi and limnodrilns sp., and the maximal volume density of wet Tubificidae in vessels of the Tubificidae reactor was 17600 g/m^3. Two operational modes, treating the excess sludge （first mode） and the returned sludge （second mode） of IODVC by the Tubificidae reactor, were used in this experiment. The results showed that the excess sludge reduction rate was 46.4% in the first mode, and the average sludge yield of the integrated system was 6.19× 10^-5 kg SS/kg COD in the second mode. Though the sludge returned to IODVC via the Tubificidae reactor, it had little impact on the effluent quality and the sludge characteristics of the IODVC. No new type of recalcitrant substance in the supernatant was discharged into the environment when the sludge was treated by Tubificidae. The experimental results also indicated that no significant changes occurred on the viscosity, specific resistance, and the floc size distribution of the sludge.

关键词： integrated wastewater treatment system sludge reduction wastewater treatment Tubificidae

Recent progress on eco-friendly quantum dots for bioimaging and diagnostics

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NANO RESEARCH 2024年第12期17卷 10309-10331页

作者： Lv, Yanbing Zhang, lifang Wu, Ruili li, lin song Henan Univ Key Lab Special Funct Mat Minist Educ Kaifeng 475004 Peoples R China Henan Univ Sch Nanosci & Mat Engn Kaifeng 475004 Peoples R China

Semiconductor quantum dots (QDs), as promising fluorescent materials, have been widely applied in biomedical application due to their unique optical properties. Currently, the most intensively studied are Cd-containing QDs (Cd-based QDs), whose potential toxicity prevents their further commercialization. In recent years, the eco-friendly QDs with low toxicity and environmental friendliness have begun to be developed, showing great potential in biomedical applications. The high-quality synthesis of eco-friendly QDs and the appropriate surface modification are key to realize their applications. This review summarizes the progress of eco-friendly QDs for biomedical applications, including their designed preparation, optical properties, surface modification, toxicity, and their applications in bioimaging and diagnostics. Finally, the challenges of eco-friendly QDs for future bioimaging and diagnostics application were provided. We believe this review will provide important guidance for promoting the development of eco-friendly QDs in bioimaging and diagnostics.

关键词： eco-friendly quantum dots (QDs) environmental friendliness surface modification bioimaging diagnostics

Nanoshell-driven carrier engineering of large quantum dots enables ultra-stable and efficient LEDs

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NANO RESEARCH 2024年第12期17卷 10453-10459页

作者： Zhang, Dandan li, Jianshun Wang, Lei Guo, Yaqi liu, Weipeng lin, Qingli li, lin song Shen, Huaibin Henan Univ Minist Educ Natl & Local Joint Engn Res Ctr High Efficiency Di Key Lab Special Funct Mat Kaifeng 475004 Peoples R China

Quantum dot (QD) light-emitting diodes (QLEDs) have been considered one of the most promising candidates for nextgeneration lighting and displays. However, the suboptimal carrier dynamics at the interface between QDs and the hole transport layer (HTL), such as leakage and quenching induced by the accumulation of electrons at high brightness, severely deteriorates the device's efficiency and stability. Here, we introduced the influence of carrier modulation by nanoshell engineering on the extermal quantum efficiency (EQE) and operation lifetime for QLEDs with large-sized QDs. The shell-driven engineering of energy level positions and band bending effectively eliminates the hole injection barrier and promotes charge injection balance. Photo-assisted Kelvin probe technique reveals that the ZnCdSe/ZnSeS QD/TFB (TFB = poly(9,9-dioctylfluorene-co-N-(4-(3-methylpropyl))diphenylamine)) interface presents an increased surface potential and quasi-Fermi level splitting, reducing heat generation during device operation at high brightness. The shell-driven carrier engineering strategy reveals that our devices exhibit a high external quantum efficiency of 26.44% and an ultralong operation time (exceeding 50,000 h) to 95% of the initial luminance at 1000 cd/m2 (T95@1000 cd/m2). We anticipate that our results provide insights into resolving the issues at the QDHTL interface and demonstrate the importance of carrier management driven by QD nanostructure tailoring for the commercialization of QLEDs.

关键词： large-sized quantum dots shell-driven carrier engineering band bending ultra-stable operation lifetime

Analysis and case study on multi-dimensional scalability of the Internet architecture

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Science in China(Series F) 2008年第11期51卷 1661-1680页

作者： XU Ke XU MingWei li Qi lin song Department of Computer Science and Technology Tsinghua University Beijing 100084 China

This paper presents the definition of multi-dimensional scalability of the Internet architecture, and puts forward a mathematical method to evaluate Internet scalability based on a variety of constraints. Then, the method is employed to study the Internet scalability problem in performance, scale and service scalability. Based on the examples, theoretical analysis and experimental simulation are conducted to address the scalability issue. The results show that the proposed definition and evaluation method of multi-dimensional Internet scalability can effectively evaluate the scalability of the Internet in every aspect, thus providing rational suggestions and methods for evaluation of the next generation Internet architecture.

关键词： Internet architecture scalability performance scalability scale scalability service scalability

Synthesis of Mg-Al-carbonate layered double hydroxide by an atom-economic reaction

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Particuology 2010年第3期8卷 198-201页

作者： Xiangyu Xu Dianqing li Jiaqing song Yanjun lin Zhi Lv Min Wei Xue Duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China

A clean method for preparing layered double hydroxides （LDHs） has been developed, featured by using the hydroxides of two different metals as starting materials by atom-economic reactions. The reactions were carried out under hydrothermal conditions in either a high pressure autoclave or a microwave digester. The compositions, structural parameters and thermal behavior of the resulting LDHs are very similar to those of materials produced by using the separate nucleation and aging steps （SNAS） method. The major advantage of the new method is that no by-product is produced, so that filtration and washing processes are unnecessary. The consequent reduction in water consumption is beneficial to the environment.

关键词： Layered double hydroxides Atom-economic reaction Clean method Mg(OH)2Al(OH)3

RGDC Peptide Modified Quantum Dots Labelling and Imaging of Tumor Cells

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Chemical Research in Chinese Universities 2011年第5期27卷 832-835页

作者： GUO Yi li Chun-rong SHEN Huai-bin ZHANG Xue-zhong li lin-song YU Qian XU li Key Laboratory for Molecular Enzymology and Engineering Ministry of Education College of Life Science Jilin University Changchun 130012 P. R. China Department of Drug Administration China-Japan Union Hospital of Jilin University Changchun 130033 P. R. China Key Laboratory for Special Functional Materials Ministry of Education Henan University Kaifeng 475004 P. R. China

The labelling and imaging of tumor cells were investigated via arginine-glycine-aspartic acidcysteine（RGDC） peptide-labelled quantum dots（QDs）. The results show that RGDC modified QDs can label SMMC-7721 tumor cells and adhere to cellular membrane. In constrast, the unmodified QDs are mainly dispersed around the cell. We also found that the RGDC-QDs can penetrate into the cell at 2 h of incubation. After 6 h of incubation, RGDC-QDs can accumulate in a unique intracellular region.

关键词： Arginine-glycine-aspartic acid-cysteine(RGDC) peptide Quantum dot Fluorescence labelling

Design of 2.1GHz CMOS Low Noise Amplifier

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The Journal of China Universities of Posts and Telecommunications 2006年第1期13卷 71-74页

作者： li En-ling song lin-hong YANG Dang-qiang XUE Ying CHU Meng Science School Xi'an University of Technology Xi'an 710048 P.R. China

This paper discusses the design of a fully differential 2.1 GHz CMOS low noise amplifier using the TSMC 0.25 μm CMOS process. Intended for use in 3G, the low noise amplifier is fully integrated and without off-chip components. The design uses an LC tank to replace a large inductor to achieve a smaller die area, and uses shielded pad capacitances to improve the noise performance. This paper also presents evaluation results of the design.

关键词： LNA LC tank noise figure shielded pads

Synthesis of Zinc Blende CdTe Nanocrystals and Facile Shape Conversion from Multipods to Dot-shaped Particles

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Chemical Research in Chinese Universities 2011年第5期27卷 739-741页

作者： SHEN Huai-bin XING Ming li lin-song WANG Hong-zhe CHEN Xia College of life Science Jilin University Changchun 130012 P. R. China Key Laboratory for Special Functional Materials Ministry of Education Henan University Kaifeng 475004 P. R. China

Branched CdTe nanocrystals with zinc blende structure were directly synthesized in the early growth stage at a high initial concentration of cadmium precursor and a high molar ratio of Cd precursor to Te precuesor. Activation of the cadmium precursor by octadecylamine was found to be critical for the formation of branched CdTe nanocrystals. Furthermore, these as-prepared CdTe nanocrystals can evolve into nearly monodisperse dots through Ostwald ripening and still keep strong photoluminescence. These results manifest a new route to synthesize branch- and dot-shaped CdTe nanocrystals with zinc blende structure.

关键词： CdTe Zinc blende Branch-shaped nanocrystal