二分子的

The results showed that the maximum UV absorption wavelengths of those 1,3,4-oxadiazole derivatives in dichloromethane were in the range of 268~327 nm, and their maximum photoluminescent wavelengths in dichloromethane and solid film were located at 332~390 nm and 359~439 nm, respectively. The 1,3,4-oxadiao1e derivatives exhibit a first endothermal peak at 120~328℃ in the DSC heating process, and the symmetrical 1,3,4-oxadiazole derivatives display a higher melting temperature. The CV curves of those 1,3,4-oxadiazole derivatives indicate that the reductive potentials of the 1,3,4-oxadiazole derivatives are located at -1.03~0.98 V, and their LUMO(the lowest unoccoupied molecual orbit) energy levels are -3.71~-3.76eV.

结果表明，该类衍生物在二氯甲烷溶液中的最大紫外吸收波长在268~327nm范围，在二氯甲烷溶液和固体膜中的最大荧光发射波长分别在332~390nm和359~439nm范围；DSC分析结果表明，5个噁二唑衍生物的起始吸热峰位于120~328℃之间，其中对称结构的噁二唑衍生物显示了较高的熔融温度；由循环伏安图和相关计算结果表明，5个噁二唑衍生物的还原电位位于-1.03~-0.98V，其相应的最低非占有分子轨道能级在-3.71~-3.76 eV之间。

It includes the following steps: polymerizing 2, 4-dihydroxyl metaphenylene diamine hydrochloride, diamine monomer and dipic acid anhydride to gain the polyimide that contains hydroxy on the molecule chain, making the hydroxyl take esterification reacting with acyl chloride and acrylic acid to gain polyimide photosensitive material that has negative photonasty.

该聚酰亚胺光敏材料以2，4-二羟基间苯二胺盐酸盐，二胺单体和二酸酐为原料进行聚合，得到分子链上含羟基的聚酰亚胺，然后使羟基与丙烯酸及其衍生物的酰氯发生酯化反应，得到具有负性感光性能的聚酰亚胺光敏材料。

In complex 1,Cucan be described as a four-coordinated square planar geometry.Compound 8 is the sodium salt of plumbagin and exists as ionic compound.Compounds 9-16 are the rare earth complexes of plumbagin with La,Y,Dy,Sm,Gd,Nd,Erand Eu.Compound 17 is binuclear Y complex.18 is mononuclear Ycomplex with plumbagin and another ligand from Plumbago Zeylanica.Compounds 19-21 are the ternary complexes with plumbagin and 2,2\'-bpy and phen as assistant ligand.In 19, the geometry of Cucan be described as five-coordinated distorted square pyramid that exists in a dimer through the weak bonding,and 1-D chain structure is formed by intermolecular hydrogen bonds.

化合物1的单晶结构分析表明1具有四配位平面四边形结构，化合物8是白花丹素的Na盐，以离子化合物形式存在；化合物9～16为白花丹素的La，Y，Dy，Sm，Gd，Nd，Er，Eu的稀土金属配合物；化合物17是白花丹素的双核钇结构；化合物18为白花丹素的单核钇结构，该配合物除了含白花丹素外，还有来自白花丹植物中的另一个单体化合物也参与配位；化合物19～21是以2，2\'-联吡啶和邻菲咯啉等含N配体为辅助配体，具有白花丹素—含N配体—金属离子的三元配合物，化合物19是白花丹素和2，2\'-联吡啶与Cu的配合物，具有五配位的四方锥构型，通过Cu…O弱的成键作用形成二聚体，再通过分子间的氢键作用进一步形成一维链状结构，化合物20和化合物21是白花丹素分别与2，2\'-联吡啶和邻菲咯啉的Zn配合物，都具有六配位八面体构型的双核锌配合物，呈一维链状结构，化合物20中链与链之间的大量氢键将一维链扩展成二维层，分子间的π-π堆积作用进一步形成三维结构。

Three kinds of small molecular copper and zinc superoxide dismutase mimics were synthesized with N, N-bis (benzimidazol-2-ylmethyl) amine (N3), N, N-bis (benzimidazol-2-ylmethyl) methylamine(MN3) and N,N-bis (benzimidazol-2-ylmethyl) benzylamine(BN3) as ligands. The com-plexes were characterized by UV, IR and element analysis and the structures were proposed.

模拟铜一锌超氧化物歧化酶的活性中心，以二(2-苯并咪唑)丙烷为桥、二(2-苯并咪唑亚甲基)胺(N3)、二(2-苯并咪唑亚甲基)甲胺(MN3)及二(2-苯并咪唑亚甲基)苄胺(BN3)为配体合成了3种异双核的小分子模型化合物，并进行了紫外、红外表征及元素分析，推测了可能的结构。

The main points of thedissertations are summarized as follows:1、Synthesis of TAP-BTE zinc complex with photochromic property and its application in non-destructive readoutA photochromic 1,2-bisthienylethenes substituted tetraazaporphyrinato zinc complex, 2,3,7,8,12,13,17,18-octakis(2\',4\',5\'-trimethyl-3\'-thienyl)tetraazaporphyrizine zinc,was synthesized by "one-pot" reaction,and was characterized by spectroscopic methods as well as the elemental analysis.

本论文的研究目的在于如何将二噻吩乙烯基团连接到卟啉、酞菁等大环分子上面，这一方面有利于光致变色性能的提升，另一方面也使得基于大环分子π-π作用的分子自组装成为可能。

We also strongly suggest that the recently reported chaperone acitivity of periplasmic PDI-ase and PPIase assayed by traditional substrate should be reexamined using periplasmic proteins as substrate due to the significant difference between those two classes of proteins, the possible chaperone fuctions of PDIase and PPIase in vivo should be reappraised.

同时，由于本实验结果显示膜间质蛋白与常用的分子伴侣测活底物蛋白在聚集行为上存在极显著的区别，我们建议对最近报导的膜间质蛋白二硫键异构酶和脯氨酸顺反异构酶分子伴侣活性以膜间质蛋白为底物再进行验证，对其在膜间质是否发挥分子伴侣功能重新慎重考虑。

In this study,urea inclusion method and molecular distillation method were applied in the purifications of ethyl ester of EPA and DHA.

用尿素沉淀法和分子蒸馏法研究了二十碳五烯酸、二十二碳六烯酸乙酯的分离提纯。

The main contents and conclusions are as follows:(1) Synthesis of 1,6-hexamethylenedicarbamate catalyzed by yttrium nitrate Yttrium nitrate was employed as the catalyst in the synthesis of 1,6-hexamethylenedicarbamate from alkyl carbamates.

主要内容和结论如下：(1)硝酸钇为催化剂合成1，6-己二氨基甲酸酯采用硝酸钇作为小分子氨基甲酸烷基酯和1，6-己二胺合成1，6-己二氨基甲酸酯的催化剂。

Results Bulbus alkaloids easily formed molecular ions(superscript + in MS and dimerized easily in alcohol solution, which did not dimerize in acidity solution. Collision induced dissociation made these alkaloids easily lose a molecule of H2O. The MS spectra of the extracts of five Bulbu Fritillartae species indicated that the major molecular ions were similar to each other, but different varieties showed very different relative abundances of these molecular ions.

结果 在正离子一级质谱中，贝母生物碱易形成带一个正电荷的准分子离子，并且在中性醇溶液中，贝母生物碱易形成二聚体，在酸性介质中则无此现象；二级碰撞诱导解离易使贝母生物碱脱去一分子水；5种贝母对照药材的总生物碱提取液的一级电喷雾质谱图显示，主要分子离子峰基本相同，但因品种不同相对丰度差异较大。

With the development of molecular-beam epitaxy and microfabrication techniques, people can arrange the atoms and moleculars at will and make various zero-dimensional, one-dimensional and two-dimensional systems even single molecular devices.

随着分子束外延等超薄生长技术和精细束加工技术的不断发展和完善，使人们能够按照自己的意愿排列原子、分子，制备出各种各样的零维、一维和二维纳米结构，甚至单分子器件。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新