Multifunctional fourfold interpenetrating diamondoid network: gas separation and fabrication of palladium nanoparticles

A fourfold interpenetrating diamondoid network, [{[Ni(cyclam)]2-(mtb)}(n)].8n H2O.4n DMF (1) (MTB=methanetetrabenzoate, DMF=dimethylformamide), has been assembled from [Ni(cyclam)][ClO4]2 (cyclam=1,4,8,11-tetraazacyclotetradecane) and methanetetrabenzoic acid (H4MTB) in DMF/H2O (7:3, v/v) in the presence of triethylamine (TEA). Despite the high-fold interpenetration, 1 generates 1D channels that are occupied by water and DMF guest molecules. Solid 1, after removal of guest molecules, exhibits selective gas adsorption behavior for H2, CO2, and O2 rather than N2 and CH4, suggesting possible applications in gas separation technologies. In addition, solid 1 can be applied in the fabrication of small Pd (2.0+/-0.6 nm) nanoparticles without any extra reducing or capping agent because a Ni II macrocyclic species incorporated in 1 reduces Pd II ions to Pd 0 on immersion of 1 in the solution of Pd(NO3)2.2H2O in MeCN at room temperature.     

One-dimensional and two-dimensional nanomaterials for the detection of multiple biomolecules

By utilizing nanomaterials including one-dimensional materials (1DMs) and two-dimensional materials (2DMs), the recent development for the determination of multiple biomolecules has been focused.     

Synthesis and Characterization of Semiconductor Nanomaterials and Micromaterials via Gamma-irradiation Route

In this review, we reported our recent studies on controlled growth of sulfide and oxide semiconductor nano-and micro-structures via gamma-irradiation route. NiS and PbS uniform hollow microspheres (∼500 nm) have been successfully synthesized by γ-irradiating PMMA-CS₂-ethanol aqueous solution that contains Ni²⁺ or Pb²⁺ at room temperature, respectively. Large-scale single-crystalline ZnO hexangular prisms were successfully prepared through a simple γ-irradiation approach at room temperature and under ambient pressure. CdSe hollow structures and hollow nanospheres (40∼50 nm), compass-shaped (80 nm in middle width and 200 nm in length) Mn₃O₄ (hausmannite) and monodisperse ZnS nanoballs etc. had been successfully synthesized through γ-irradiation route with different surfactant-assisted systems at room temperature. Those successful synthesis approaches in large scale and under mild conditions could be of interest for both applications and fundamental studies.     

仿生超疏水性表面的研究进展*

仿生超疏水性表面的研究是化学模拟生物体系研究中的一个新领域。荷叶等植物叶面的超疏水现象为我们在不同基底上制备仿生超疏水性表面提供了实践基础。本文给出荷叶等三种植物叶面的超疏水性和微观结构，阐述了仿生超疏水性表面的研究进展。     

An efficient first-principle approach for electronic structures calculations of nanomaterials

An efficient parallel implementation has been realized for a recently proposed central insertion scheme (Jiang, Liu, Lu, Luo. J Chem Phys 2006, 124, 214711; J Chem Phys 2006, 125, 149902) that allows to calculate electronic structures of nanomaterials at various density functional theory levels. It has adopted the sparse-matrix format for Fock/Kohn-Sham and overlap matrices, as well as a combination of implicitly restarted Arnoldi methods (IRAM) and spectral transformation for computing selected eigenvalues/eigenvectors. A systematic error analysis and control for the proposed method has been provided based on a strict mathematical basis. The efficiency and applicability of the new implementation have been demonstrated by calculations of electronic structures of two different nanomaterials consisting of one hundred thousand electrons.     

Nanomaterials for rechargeable lithium batteries

Energy storage is more important today than at any time in human history. Future generations of rechargeable lithium batteries are required to power portable electronic devices (cellphones, laptop computers etc.), store electricity from renewable sources, and as a vital component in new hybrid electric vehicles. To achieve the increase in energy and power density essential to meet the future challenges of energy storage, new materials chemistry, and especially new nanomaterials chemistry, is essential. We must find ways of synthesizing new nanomaterials with new properties or combinations of properties, for use as electrodes and electrolytes in lithium batteries. Herein we review some of the recent scientific advances in nanomaterials, and especially in nanostructured materials, for rechargeable lithium-ion batteries.     

Electrodeposition of nano- and microcrystalline aluminium in three different air and water stable ionic liquids.

The present work shows, for the first time, a comparative experimental study on the electrodeposition of aluminium in three different water and air stable ionic liquids, namely 1-butyl-1-methylpyrrolidinium-bis(trifluoromethylsulfonyl)imide ([BMP]Tf2N), 1-ethyl-3-methylimidazolium-bis(trifluoromethylsulfonyl)imide ([EMIm] Tf2N), and trihexyl-tetradecyl-phosphoniumbis(trifluoromethylsulfonyl)imide (P(14,6,6,6) Tf2N). The ionic liquids [BMP]Tf2N and [EMIm]Tf2N show biphasic behaviour in the AlCl3 concentration range from 1.6 to 2.5 mol L(-1) and 2.5 to 5 mol L(-1), respectively. The biphasic mixtures become monophasic at temperatures >/=80 degrees C. It was found that nanocrystalline aluminium can be electrodeposited in the ionic liquid [BMP]Tf2N saturated with AlCl3. The deposits obtained are generally uniform, dense, shining, and adherent with very fine crystallites in the nanometer size regime. However, coarse cubic-shaped aluminium particles in the micrometer range are obtained in the ionic liquid [EMIm]Tf2N. In this liquid the particle size significantly increases as the temperature rises. A very thin, mirrorlike aluminium film containing very fine crystallites of about 20 nm is obtained in the ionic liquid [trihexyl-tetradecyl-phosphonium]Tf(2)N at room temperature. At 150 degrees C, the average grain size is found to be 35 nm.     

wo2.50纳米组装片的制备、表征及其在导电涂料中的应用

利用内在还原法制备了长0.7～1.2μm,宽180～250 nm的WO2.50纳米组装片。通过透射电子显微镜观察发现,该纳米组装片是由直径约45 nm的纳米粒子组装而成的。产物由WO2.00和WO2.90两相组成,具有良好的结晶度,其比表面积为13.6 m2/g。产物具有良好的导电性(电阻率为0.1Ω.cm)和与树脂的亲和性。产物的红外光谱中,νW—O吸收峰发生了33 cm-3的红移。采用热重-差示扫描量热测试技术对前驱物进行了热分析,对实验条件进行了探索,确定最佳制备温度为750℃。对WO2.50纳米组装片的形成机理作了探讨,将其应用在导电涂料领域,测得漆膜的表面电阻率为5Ω.cm。     

Ni-P-无机类富勒烯WS_2纳米材料化学复合镀层的制备及其摩擦学性能初步研究

用化学复合镀技术制备了含有无机类富勒烯硫化钨纳米材料的Ni-P-(IF-WS_2) 复合镀层。用环-块摩擦实验测试了Ni-P-(IF-SW_2)的摩擦学性能。研究结果表明 它比与Ni-P，Ni-P-(层状2H-WS_2)和Ni-P-石墨复合镀层具有更高的耐磨性能和更 低的摩擦系数。分析了无机类富勒烯纳米材料改善镀层摩擦学性能的机理。     

Strong Adsorbability of Mercury Ions on Aniline/Sulfoanisidine Copolymer Nanosorbents

The highest Hg‐ion adsorbance so far , namely up to 2063 mg g^?1, has been achieved by poly(aniline‐co‐5‐sulfo‐2‐anisidine) nanosorbents. Sorption of Hg ions occurs mainly by redox and chelation mechanisms (see scheme), but also by ion exchange and physisorption.