Phase Transition and EOS of Marmatite （Zn0.76Fe0.23S） up to 623K and 17 GPa

In situ energy dispersive x-ray diffraction for natural marmatite （Zn0.76Fe0.23S） is performed up to 17. 7 GPa and 623 K. It is fit, ted by the Birch-Murnaghan equation of state （EOS） that Ko and α0 for marmatite are 85（3）GPa and 0.79（16）＊10^-4 K^-1, respectively. Fe^2＋ isomorphic replacing to Zn^2＋ in natural crystal is responsible for high bulk modulus and thermal expansivity of marmatite. Temperature derivative of bulk modulus （OK/OT）p for marmatite is fitted to be -0.044（23） GPaK^-1. The unambiguous B3-B1 phase boundaries for marmatite are determined to be Pupper（GPa）= 15.50 - 0.016T（℃） and Plower （GPa）=9.94-0.012T（℃） at 300-623K.     

水相中磷钼酸催化三组分合成烯丙基胺

以磷钼酸作为催化剂，芳香醛、胺和三丁基烯丙基锡三组分在水作为溶剂，室温下高产率的得到相应的烯丙基胺。     

钯-碳/NaHCO3催化下2,4-二氯嘧啶的区域选择性脱氯反应：一种合成2-氯嘧啶的有效方法

本文报道了一种合成2-氯嘧啶的有效方法。易得原料2,4-二氯嘧啶在钯-碳/NaHCO3作用下可以区域选择性地脱除2位氯原子得到2-氯嘧啶。2-氯嘧啶可以用作多种复杂嘧啶衍生物的有效合成砌块。     

Photochemical degradation of environmentally persistent perfluorooctanoic acid （PFOA） in the presence of Fe（Ⅲ）

Environmentally persistent and bioaccumulative perfluorooctanic acid （PFOA） was difficult to be decomposed under the irradiation of 254 nm UV light. However, in the presence of 80μmol/L Fe（Ⅲ）, 80% of PFOA with initial concentration of 48μmol/L （20 mg/L） was effectively degraded and 47.8% of fluorine atoms in PFOA molecule were transformed into inorganic fluoride ion after 4 h reaction. Shorter chain perfluorocarboxylic acids bearing C3-C7 and fluoride ion were detected and identified by LC/MS and IC as the degradation products in the aqueous solution. It was proposed that complexes of PFOA with Fe（Ⅲ） initiated degradation of PFOA irradiated with 254 nm UV light.     

新型偶氮苯金属液晶化合物的合成与性能研究

合成了新型偶氮苯金属配合物。 分别采用光谱分析、热分析及X射线衍射测试技术对样品进行了表征。结果表明,连接偶氮苯和金属配合物之间碳链的长度对该化合物的相转变和荧光特性具有特殊的影响。 该系列化合物在紫外光和热作用下具有99%以上的偶氮苯顺-反异构化反应效率;具有290和560 nm这2个波段荧光发射光谱。由其中一个金属液晶化合物分散在聚甲基丙烯酸甲酯网络而形成的介质可作为全息信息存储材料而实现全息图像的写入和读出。     

高压下层状钙钛矿结构锰氧化物Ca3Mn2O7的结构相变

采用金刚石压砧高压装置(DAC),对Ca₃Mn₂O₇的粉末样品进行了高压能散X射线衍射实验. 实验结果表明,由于岩盐层易被压缩,在压力作用下层状钙钛矿结构锰氧化物Ca₃Mn₂O₇的结构不稳定. 在0~35 GPa压力范围内,Ca₃Mn₂O₇晶体结构发生了两次相变. 在1.3 GPa左右,由原来的四方相变为正交相,在9.5 GPa左右,又由正交相向新的四方相转变.     

W18Cr4V

The frictionand wear characteristics of the surfa ce compound layer of W18Cr4V steel by combined treatment of ion nitrocarburizing-ion sulphurizing were investigated. The friction coefficient of the compound l ayer against GCr15 steel was determined witha block-ring friction tester. The wear test was carried out with a reciprocating wear tester. The worn surface was analyzedby scanning electron microscopy(SEM). The experimental results reveale d that the friction coefficient was lower for treatedW18Cr4V steel against GCr1 5 steel. The wear resistance of the compound layer was higher because the nitroc arbonide andthe sulphide in the compound layer were capable of friction-reduct ion and adhesion-inhibition.     

Erratum to "Aerosol pollution in China: Present and future impact on environment"

PARTICUOLOGY regrets that the above paper was mistakenly classified as a ‘Review’ rather than an ‘Invited paper’ when originally published in volume 7, issue 6, 426–431.     

Synthesis, Structure and DFT Investigation into a Copper(II) Compound Consisting of 4,7-diphenyl-1,10-phentheanthroline

1 INTRODUCTION terested in the unique effects associated with substituents at 4- and 7-positions of the phenan- The coordination chemistry of 1,l0-phenanthroline throline ring. Thus, when phenyl groups are present, and its derivatives has captured the attention of che- the absorptivities of the CT transitions are increased mists for years. The reports on biological importance[1~4], markedly due to the extension of the dipole moment supramolecular chemistry[5], electronic spectra[6], conne…