用于1,5-萘二氨基甲酸酯分离提纯的溶剂及其应用

一种用于１，５－萘二氨基甲酸酯分离提纯的溶剂组成为沸程范围为６０～９０℃的石油醚与乙酸乙酯体积比为６０～１００∶１。用于用于１，５－萘二氨基甲酸酯分离提纯方法是将１，５－萘二胺与碳酸二甲酯反应制备１，５－萘二氨基甲酸甲酯的反应液除去催化剂，再将过量的末参与反应的碳酸二甲酯蒸去得到固体混合物；按固体混合物与溶剂重量比为１∶２０－１００的比例加入溶剂中，室温下缓慢搅拌１～１０小时，过滤，滤饼为１，５－萘二氨基甲酸甲酯产品。本发明具有简便易行，高收率，高纯度的优点。

Tetraaqua(1,10-phenanthroline-kappa(2) N, N ')copper(II)naphthalene-1,5-disulfonate dihydrate

In the title structure, [Cu(C12H8N2)(H2O)(4)](C10H6S2O6)center dot-2H(2)O, the cation lies on a crystallographic twofold rotation axis and the anion lies on a centre of inversion. The Cu-II atom is coordinated by two N atoms of a 1,10-phenanthroline ligand and four O atoms from four water ligands in a distorted octahedral geometry. The unique Cu-O distances are 2.054 (2) and 2.088 (2) angstrom and the Cu-N distance is 2.073 (2) angstrom. In the crystal structure, a three-dimensional supramolecular framework is constructed by extensive intermolecular O-H center dot center dot center dot O hydrogen bonds.

Synthesis, characterization and electrical properties of the new solid electrolyte materials Ce6-xErxMoO15-delta (0.0 < x < 1.5)

A new series of oxides, Ce6-xErxMoO15-delta (0.0 less than or equal to x less than or equal to 1.5), was synthesized using wet-chemistry techniques. The precursors and resultant oxide powders were characterized by differential thermal analysis/thermogravimetry, x-ray diffraction, and IR, Raman and x-ray photoelectron spectroscopy. The formation temperature of the powders was found to be as low as 350degreesC. Ce6-xErxMoO15-delta crystallized to a fluorite-related cubic structure. The electrical conductivity of the samples was investigated by using ac impedance spectroscopy. This showed that the presence of Er was related to the oxygen-ion conductivity, and that the highest oxygen-ion conductivity was found in Ce6-xErxMoO15-delta (x = 0.4), ranging from 5.9 x 10(-5) S cm(-1) at 300degreesC to 1.26 x 10(-2) S cm(-1) at 700degreesC, respectively. This kind of material shows a potential application in intermediate-temperature solid oxide fuel cells.

Comparative study on the doping effect of 3d elements in Bi(1.5)Pb(0.2)Sr(2)Ca(2)Cu(2.8)M(0.2)O(y) (M=Sc,Ti,V,Cr,Mn,Fe,Co,Ni, or Zn)

With XRD, R-T, and ac chi measurements a comparative study on the doping effects of 3d elements in Bi(1.5)Pb(0.2)Sr(2)Ca(2)Cu(2.8)M(0.2)O(y) (M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, or Zn) has been carried out. The effects of the former five members are significantly different, both on phase formed and on T-c, from the latter four. It seems that the effect on phase stabilization correlates with the valency of the doped cation. In connection with the instability of the 2223 phase, the correlation has been discussed.

α-羰基烯酮环二硫代缩醛化学(Ⅹ)——β,β-1,5-亚丙二硫基-α,β-不饱和酮与烯丙基Grignard试剂加成物的酸催化反应取向研究

β,β-1,5-亚丙二硫基-α,β-不饱和酮2b和2-甲基烯丙基氯化镁加成可得醇3b.在BF_3·Et_2O催化下,3b经分子内环合芳构化生成芳硫醚5b.2和烯丙基溴化镁反应得醇4,4在BF_3·Et_2O催化下经β-消除脱水生成共轭多烯类化合物6.二硫缩醛基以环和非环结构及环的大小对2与烯丙基Grignard试剂加成物在酸催化下的反应取向有重要影响.

1,5-二羟基蒽醌及其稀土配合物的红外光谱研究

利用同位素取代技术,并比较1,5-二羟基蒽醌及其稀土配合物的光谱变化,归属了它们的红外吸收带。确认了Ln—O键的特征带,分析了配位键的性质。

新的稀土锂钒酸盐[Y_(0.5-x)Li_(1.5)VO_4:(Dy~(3+),Eu~(3+))_x]多波段发光

本文首次报道了新的稀土锂钒酸盐Y_(0.5-x)Li_(1.5)VO_4:(Dy~(3+),Eu~(3+))_x多晶粉末的制备,多波段发光和结构. 样品的制备是采用稀土氧化物(Y_2O_3Dy_2O_3和Eu_2O_3)纯度为99.99％与光谱纯的V_2O_5和Li_2CO_3按化学计量比混匀,在

HMTTeF·I_(1.5)单晶的合成、电导及晶体结构的特性

由六次甲基四碲富瓦烯(HMTTeF)所形成的有机化合物晶体,有两种可能的化学结合形式:一种是分子中的Te原子离子化,形成离子型化合物;另一种是分子中心共轭π键离子化,或者形成离子型化合物,或者形成混合价态型化合物。至今被报道的HMTTe F化合物晶体都只含有其中一种化学结合形式,而标题化合物晶体则同时含有上述两种化学结合形式。本文将该晶体的晶体结构、化学结合与电导性的关系作简要的讨论。

1,5,9-环十二碳三烯的阳离子型跨环齐聚合反应

本文研究1,5,9-环十二碳三烯在阳离子型引发剂AlCl_3和BF_3·OEt_2催化下进行的跨环聚合反应,考察各种反应条件对跨环聚合反应的影响。产物为白色粉末,分子量均在1096—1431之间。对其溶解性、核磁共振和红外光谱的分析,确认了它的结构。

硬粒小麦-节节麦人工合成种HMW-GS组成及1.5＋10亚基的遗传分析

对CIMMYT的99份硬粒小麦-节节麦人工合成种（简称合成种）的HMW-GS组成分析发现，Glu-B1和Glu-D1位点的变异类型比普通小麦丰富，分别有9种和12种亚基类型；筛选出含有比5＋10亚基更优质的1．5＋10和5＋12亚基的合成种分别有8份和1份；含有优质亚基1．5＋10的合成种与普通小麦杂交结实正常；对2个合成种与2个普通小麦品种的8个止反交组合F1种子电泳发现，优质亚基1．5＋10在F1代能正常表达，双亲所有亚基任F1代都得到表达，表现共显性遗传。本研究为优质亚基1．5＋10和5＋12转育到普通小麦中奠定了基础。

Spectral analysis and control to obtain sub-5 fs pulses by femtosecond filamentation

A spectral-filter method is numerically demonstrated to obtain sub-5 fs pulses by using femtosecond filamentation in fused silica. Instead of employing spectral phase compensation, by properly employing a high-pass filter to select the broadened high-frequency spectra that are located almost in phase in the tailing edge of the self-compressed pulses owing to self-steepening, as short as single-cycle pulses can be obtained. For instance, for an input pulse with a duration of 50 fs and energy 2.2 mu J, the minimum pulse duration can reach to similar to 4 fs (about 1.5 cycles) by applying a proper spectral filter. (C) 2008 Optical Society of America

Intense upconversion and infrared emissions in Er3+;Yb3+ codoped Lu2 Si O5 and (Lu0.5 Gd0.5)2 Si O5 crystals

High optical quality Lu2SiO5 (LSO) and (Lu0.5Gd0.5)(2)SiO5 (LGSO) laser crystals codoped with Er3+ and Yb3+ have been fabricated by the Czochralski method. Intense upconversion (UC) and infrared emission (1543 nm) are observed under excitation of 975 nm. The luminescence processes are explained and the emission efficiencies are quantitatively obtained by measuring the UC efficiency and calculating the emission cross section. The temperature-dependent optical properties of the crystals are also investigated. Our study indicates that Er3+-Yb3+ : LSO and Er3+-Yb3+: LGSO crystals are promising gain media for developing the solid-state 1.5 mu m optical amplifiers and tunable UC lasers. (c) 2008 American Institute of Physics.

中国5种珍稀绢蝶非损伤性取样的mtDNA序列及系统进化

应用非损伤性取样DNA测序技术测定了4种来自云南白马雪山和1种来自新疆天山的5种珍稀绢蝶的线粒体DNA细胞色素b基因部分DNA序列。PAUP3.1.1(简约法)数据分析软件构建该5个种绢蝶的分子系统树显示,爱珂绢蝶(Parnassius acco)和巴裔绢蝶(Parnassius baileyi)的亲缘关系比较接近,阿波罗绢蝶(Parnassius apollo)、珍珠绢蝶(Parnassius orlears)和西猴绢蝶(Parnassius simo)3种绢蝶均为相对独立的一支,其中西猴绢蝶分化较早,与形态学研究结果相吻合。