Nd~(3+)离子的晶场劈裂与基质晶体的化学键

利用研究复杂晶体化学键的理论方法，计算了一组ABO4型基质晶体的结构参数和化学键参数，发现Nd3+离子的总晶场劈裂能ΔE与晶体的平均共价性有线性关系.

非线性光学新材料K_2Ln(NO_3)_5.2H_2O(Ln=La,Ce,Pr,Nd,Sm)的晶体生长、结构和表征

非线性光学新材料Ｋ２Ｌｎ（ＮＯ３）５·２Ｈ２Ｏ（Ｌｎ＝Ｌａ，Ｃｅ，Ｐｒ，Ｎｄ，Ｓｍ）的晶体生长、结构和表征董文庭张洪杰苏锵（中国科学院长春应用化学研究所稀土化学与物理开放实验室，长春１３００２２）Ｇｒｏｗｔｈ，ＳｔｒｕｃｔｕｒｅａｎｄＣｈａｒａｃｔ...

KCl-LiCl共晶熔体中Nd~(3+)和Ho~(3+)的电化学行为

用循环伏安法和恒电流电解后的电位时间曲线法，研究了ＬｉＣｌＫＣｌ熔体中Ｎｄ３＋和Ｈｏ３＋在Ｍｏ电极上的电化学行为。结果表明，Ｎｄ３＋和Ｈｏ３＋在Ｍｏ电极上的还原都为一步３电子可逆过程。其扩散系数分别为：１１３×１０－６和２１４２×１０－５ｃｍ２·ｓ－１（４５０℃），４５０℃下Ｈｏ３＋／Ｈｏ电极对的标准氧化还原电位为２９８７Ｖ（ｖｓ·Ｃｌ／Ｃｌ－１），并讨论了实验值较理论值偏负的原因。

Electrochemical behavior of molybdotungsate heteropoly complex with neodymium K10H3[Nd(SiMo7W4O39)(2)]xH(2)O in aqueous solution

The voltammetric behavior of the titled compound (denoted as Nd (SiMo7W4)(2)(13-)) in aqueous solution had been studied. An unusual pH response was discussed. The adsorption of the anion on the dropping mercury electrode and a self-inhibition influence of the adsorbed anions on the redox process of those anions dissolved in solution were found. The electrocatalytic effects of the anion on the bromate reduction were investigated.

Electrochemical behavior of the molybdotungstate heteropoly complex with neodymium, K10H3[Nd(SiMo7W4O39)(2)]center dot xH(2)O in aqueous solution

The electrochemical behavior of the title compound (denoted Nd(SiMo7W4)(2)(13-)) in aqueous solution has been studied using cyclic voltammetry, sampled d.c. voltammetry, differential pulse voltammetry and bulk electrolysis with coulometry, The stable pH range of Nd(SiMo7W4)(2)(13-) is determined with UV-visible spectra. In the potential range between 0.70 and -0.45 V vs. SCE, the anion in pH 3.8 aqueous solution undergoes one-, one-, two- and two-electron steps of four redox processes attributed to electron addition and removal from the molybdate-oxo framework. The adsorption of the anion on the dropping mercury electrode and a self-inhibition influence of the adsorbed anions on the redox process of those anions dissolved in solution are found. The unusual dependence of the formal potentials on pH is explained with the competition of the protonation and ion-pair formation due to the high negative charge of Nd(SiMo7W4)(2)(13-) and its reduced forms. The electrocatalytic effects of the anion on the bromate are investigated.

The reactivity of lanthanide alkyl compounds with phenylacetylene: Synthesis and structure of [(Bu(t)Cp)(2)LnC CPh](2) (Ln=Nd, Gd)

[(Bu(t)Cp)(2)LnCH(3)](2) (Ln = Nd, Gd) react with PhC=CH to form the dimeric alkynide-bridged complexes [(Bu(t)Cp)(2)LnC=CPh](2) [Ln = Nd (I), Gd (II)]. Both compounds crystallized from toluene in the monoclinic space group C2/c. The two complexes are homologous, composed of asymmetric metal-alkynide bridges with Nd-C, Gd-C (alkynide) bond lengths of 2.602(4), 2.641(5) (I) and 2.532(6), 2.601(7) Angstrom (II), respectively. The average Nd-C (ring) and Gd-C (ring) distances are 2.746(13) and 2.703(19)Angstrom.

Relationship between the dissolution behaviours and current efficiencies of La, Ce, Pr and Nd in their chloride molten salts

The dissolution behaviours of La and Nd in their chloride molten salts were studied by means of the see-through cell, electrochemical weak polarization and quantum chemistry (extended Huckel molecular orbital). The reasons for the low current efficiencies of rare earth metals and the difference between La and Nd in their own chloride electrolytes on the basis of the solubility, rate of dissolution, and existing state of the metals dissolved as well as the structure of the melts, are discussed.

光折变Ce∶Nd∶LiNbO3晶体用于实时光学图象处理

Ｃｅ：Ｎｄ：ＬｉＮｂＯ３晶体具有优良的光折变性能，它作为全息记录介质，用于实现了光学图象微分和全息关联存储。

Nd（i－PrO）_2Cl－AlEt_3均相二元催化剂异戊二烯聚合动力学──Ⅲ．AlEt_3的链转移作用

Ｎｄ（ｉ－ＰｒＯ）_２Ｃｌ－ＡｌＥｔ_３均相二元催化剂异戊二烯聚合动力学──Ⅲ．ＡｌＥｔ_３的链转移作用蔡小平，龚志，王佛松朱行洁，李秀华（中国科学院长春应用化学研究所长春１３００２２）（吉林化工集团公司研究院吉林）关键词异戊二烯，聚合动力学，均相催化...

PREPARATION STRUCTURE AND PHYSICAL-PROPERTIES OF NEW SILVER LANTHANIDE MOLYBDENUM OXIDES [AGLNMO(2)O(8)(LN=LA-ND AND SM)]

We present the synthesis of AgLnMo(2)O(8) compounds with Ln = La-Nd and Sm. These compounds represent a scheelite-type structure characterized by MoO4- tetrahedrons. IR spectra show five absorption peaks in the region of 1000-400cm(-1), around 800cm(-1) and 400cm(-1), which correspond to the modes of the tetrahedral MoO42- groups. All of AgLnMo(2)O(8) (Ln = La-Nd and Sm) oxides are dielectric materials at room temperature. The temperature dependence of the magnetic susceptibility ofAgLnMo(2)O(8) (Ln = Ce-Nd and Sm) shows Curie-Weiss law behavior from 100K to 300K. This indicates that both Ce and Pr exist in +3 oxidation state in AgLnMo(2)O(8). For AgLaMo2O8, diamagnetic properties are found as expected.

SYNTHESES AND CRYSTAL-STRUCTURES OF (C8H8)ND(C5H9C5H4)(THF)(2) AND [(C8H8)GD(C5H9C4H4(THF)][(C8H8)GD(C5H9C5H4(THF)(2)]

LnCl(3) (Ln = Nd, Gd) reacts with C5H9C5H4Na (or K2C8H8) in THF (C5H9C5H4 = cyclopentylcyclopentadienyl) in the ratio of 1:1 to give (C5H9C5H4)LnCl(2)(THF)(n) (or (C8H8)LnCl(2)(THF)(n)], which further reacts with K2C8H8 (or C5H9C5H4Na) in THF to form the title complexes. If Ln = Nd the complex (C8H8)Nd(C5H9C5H4)(THF)(2) (a) was obtained: when Ln = Gd the 1:1 complex [(C8H8)Gd(C5H9C5H4)(THF)][(C5H8)Gd(C5H9C5H4)(THF)(2)] (b) was obtained in crystalline form. The crystal structure analysis shows that in (C8H8)Ln(C5H9C5H4)(THF)(2) (Ln = Nd or Gd), the Cyclopentylcyclopentadienyl (eta(5)), cyclooctatetraenyl (eta(8)) and two oxygen atoms from THF are coordinated to Nd3+ (or Gd3+) with coordination number 10. The centroid of the cyclopentadienyl ring (Cp') in C5H9C5H4 group, cyclooctatetraenyl centroid (COT) and two oxygens (THF) form a twisted tetrahedron around Nd3+ (or Gd3+). In (C8H8)Gd(C5H9C5H4)(THF), the cyclopentyl-cyclopentadienyl (eta(5)), cyclooctatetraenyl (eta(8)) and one oxygen atom are coordinated to Gd3+ with the coordination number of 9 and Cp', COT and oxygen atom form a triangular plane around Gd3+, which is almost in the plane (dev. - 0.0144 Angstrom).

Nd（OPr~i）_2Cl－AlEt_3均相二元催化剂异戊二烯聚合动力学Ⅰ．一般动力学研究

用膨胀计研究了Ｎｄ（ＯＰｒｉ）２Ｃｌ－ＡｌＥｔ３均相稀土催化剂异戊二烯聚合动力学．在实验条件下，本体系显示稳态聚合特征；聚合速度对单体浓度和催化剂浓度均为一级关系，即聚合速度方程为Ｒｐ＝Ｋｐ［Ｎｄ］［Ｍ］；本体系总的活化能Ｅａ为５７．４ｋＪ／ｍｏｌ．

Nd（OPr~i）_2Cl－AlEt_3均相二元催化剂异戊二烯聚合动力学 Ⅱ．动力学参数的测定

用动力学方法测定了本体系不同温度下（３０℃，４０℃，５０℃）的平均增长链寿命τ，活性增长链浓度［Ｃ＊］，催化剂效率ＥＬＣＵ和绝对增长速度常数ｋｐ等主要动力学参数；求算了本体系增长反应活化能Ｅｐ＝５７．４ｋＪｍｏｌ．研究结果表明：该体系催化活性低的主要原因是其绝对增长速度常数太低．

［（μ－CF＿3CO＿2）＿2Ln（μ－CF＿3HCO＿2）Al（i－Bu）＿2·2THFl＿2（Ln＝Nd，Y）配合物的NMR和X－射线衍射研究

对［μ－ＣＦ＿３ＣＯ＿２）＿２Ｌｎ（μ－ＣＦ＿３ＨＣＯ＿２）Ａｌ（ｉ－Ｂｕ）＿２·ＴＨＦｌ＿２（Ｌｎ＝Ｎｄ，Ｙ）配合物单晶结构的Ｘ－射线分析指出，配合物具有中心对称性，配位中心由两个稀土和两个Ａｌ离子组成，稀土由两个ＴＨＦ和６个ＴＦＡ分子配位形成畸变的三盖三棱柱结构，Ａｌ由两个ＴＦＡＧ和两个ｉ－Ｂｕ配位形成四面体结构。桥连Ａｌ与两个稀土的ＴＦＡ分子的羧基发生歧化加氢，其碳原子由ＳＰ￣２型转变为ＳＰ￣３型．ＮＭＲ研究表明，在ＴＨＦ溶液中，该配合物保持了它在单晶中的配位结构，所不同的是两个ｉ－Ｂｕ在溶液中有两种异构形成，二者间为慢交换过程。

异核双金属离子对配合物［Mo（dtc）_4］·［Nd（dtc）_4］的合成、结

合成了一种新型异核双金属离子对配合物［Ｍｏ（ｄｔｃ）＿４］·［Ｎｄ（ｄｔｃ）＿４］，并通过Ｘ－射线衍射法和元素分析确定了其晶体结构和分子结构，在此基础上，经红外光潜分析确定了该配合物的谱学性质。