吡啶

With good stability and high reactivity, pyridine-based tridentate N-ligands have been widely used in the fields of coordination chemistry, organic synthesis and homogeneous catalysis.

吡啶基含氮三齿配体具有良好的稳定性和反应活性，在配位化学，有机合成和均相催化中均得到了广泛的应用。

Two novel tridentate polypyridyl mixed-ligand cobalt [Co(H2Bzimpy)]3+ and ruthenium complexes were synthesized and characterized via elemental analysis and 1H NMR. The crystal structure of complex B was determined.

合成了两种新型三齿多吡啶钴 [Co(H2Bzimpy)]3+和钌混配配合物，用元素分析和1H NMR等对其结构进行了表征，测定了配合物B的晶体结构。

Two novel tridentate polypyridyl mixed-ligand cobalt [Co (H2Bzimpy)(superscript 3+)] and ruthenium complexes were synthesized and characterized via elemental analysis and (superscript 1)H NMR. The crystal structure of complex B was determined. The interactions between the complexes and calf thymus DNA were investigated with absorption and fluorescence spectroscopys. Photoactivated cleavage of pBR322DNA by the synthesized complexes were studied.

合成了两种新型三齿多吡啶钴[Co(H2Bzimpy)](上标 3+)和钌混配配合物，用元素分析和1HNMR等对其结构进行了表征，测定了配合物B的晶体结构用电子吸收光谱和荧光光谱等方法研究了配合物与小牛胸腺DNA的相互作用以及配合物对pBR322DNA的断裂作用。

Triphenylmethyl chloride can react selectively with the 30-hydroxil group of glycyrrhetol under the catalyzing effects of three ethyl amine and dimethyl amino-pyridine.This condition of the reaction has an important value for the selective protection of 30-hydroxil group of glycyrrhetol.

三苯氯甲烷在三乙胺和二甲氨基吡啶等碱性催化下与甘草萜醇的C30-位羟基进行选择性缩合反应，此反应产率较与C3-位羟基化反应的要高，此种反应条件在甘草萜醇C30-位羟基的选择性保护中具有重要的价值。

In addition, a highly efficient method of preparing Pd〓 was investigated by directly reacting PdCl〓 with triphenylphosphine in pyridine.

并发现由PdCl〓和PPh〓直接在吡啶溶剂中反应可高产率地制备〓。

A series of lanthanide complexes (Ln = Er, Nd, Yb) with infrared emission properties were designed and synthesized by using different anionic ligands [1 -phenyl-3-methyl-4-(4-tertbutylbenzoyl)-5-pyrazolone and l-phenyl-3-methyl-4--5-pyrazolone and 2-naphtoyl trifluoroacetone] and netural ligands (2,2-dipyridine, phenanthroline, triphenylphosphine oxide and water). Three crystal structures of these complexes were obtained and structure studied, and the properties of photoluminescence and fluorescent lifetime were studied in detail.

我们通过选用不同的第一配体[1-苯基-3-甲基-4-(4-异丁酰基)-5-吡唑酮，1-苯基-3-甲基-4-(4-叔丁基苯甲酰基)-5-吡唑酮和2-萘基三氟乙酰丙酮]和第二配体(2，2-联吡啶，邻菲啰啉，三苯基氧膦)合成了16个稀土红外配合物(Ln=Er，Nd，Yb)，获得了其中三个配合物的单晶结构，研究了这些稀土红外配合物的光致发光和荧光寿命等性质。

One mixed-ligand complex ofnH2Otpa=terephthalate, tripy=4'-(4methyoxyphenyl-2,2':6',2-terpyridine was synthesized and characterized by IR, elemental analysis and thermo-gravimetric analysis. The crystal structure of the product was established by single-crystal X-ray diffraction.

采用水热法合成了新的维链状锌的配位聚合物nH2O（tpa=对苯二甲酸，tripy=4'-（4-甲氧基苯基）－2，2'：6'，2-三联吡啶），通过红外光谱和元素分析对该配位聚合物进行了结构表征，用X射线单晶衍射测定了晶体结构。

According to Johnson's Rule and IR spectra, their possible structures are suggested. The bonding parameters of those complexes are calculated by ESR parameters. And the crystal field parameters are calculated by using electronic spectral data. It can be seen that the vanadyl complexes in the solution are ionic complexes and that the α〓 values of those complexes decrease following the increasing of the N donor replacing the O donor of water on the equatorial plane in those complexes. This means that the covalent bonding between vanadium and ligand increases as Ser, Phen or Bipy replace water ligands. The results show the competitive coordinate law that the coordination reactivity of Phen and Bipy is much stronger than that of Ser. The simulation program of ESR is compiled by the theory of ESR in the present work.

测定了VO-丝氨酸二元体系、VO-丝氨酸-邻菲咯啉三元体系和VO-丝氨酸联吡啶三元体系在不同酸度下（pH=1.0～14.0）的乙二醇／水（V／V=1：1）溶液低温ESR谱，发现不同pH下，溶液中具有不同组成的配合物，根据不同pH下ESR谱的变化，利用Johnson的加合规则并结合红外光谱，推测了它们在溶液中的可能结构；利用波谱参数计算了配合物键参数；利用电子光谱数据计算了配合物的晶体场参数，讨沦了它们的成配特性，结果表明：VO配合物属离子型配合物，随取代水分子的配体（Ser、Phen或Bipy）数目增加，键参数减小，配合物共价性增强，同时得出这些体系中，生物配体竞争配位规律：Phen和Bipy与VO的配位能力比Ser强。

PrefaceNifedipine, a calcium channel - blocking agent, is widely used for the treatment of hypertension, vasospastic angina and certain types of cardiac arrhythmias.

前言 硝苯吡啶为一种有效的钙离子通道拮抗剂，广泛应用于治疗高血压及血管痉挛性心绞痛、某些心律不齐等冠心病。

Conductivity of Polyoxyethylene/Poly (2-vinyl pyridine)Blend and Compatibilizing Effect of Lithium Perchlorate;2. Graft terpolymerization of polyoxyethylene macromer with acrylates;3. Then multiblock copolymers was obtained by condensing polyoxyethylene and poly(2 vinylpyridine)with dichloromethane in the presence of potassium hydroxide.

甲基萘锂作为引发剂利用阴离子聚合得到 2 乙烯基吡啶的遥爪双羟基低聚物(P2VP)，然后以二氯甲烷作偶联剂与聚环氧乙烷反应制备P2VP和PEO多嵌段共聚物，考察了反应时间对偶联反应的影响，并对共聚物进行了IR和1H NMR表征，由1H NMR谱的积分曲线得到了共聚物中PEO链段质量分数。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。