双电荷离子［C_（12）H_（12）N_2O］~（2＋）和［C_（12）H_（12

双电荷离子［Ｃ_（１２）Ｈ_（１２）Ｎ_２Ｏ］~（２＋）和［Ｃ_（１２）Ｈ_（１２）Ｎ_２Ｓ］~（２＋）的气相单分子分解反应研究任达，贾维平，李智立，刘淑莹（中国科学院长春应用化学研究所，长春，１３００２２）关键词双电荷离子，质量分析离子动能谱，串联质谱，４...

杂多酸在活性炭上的固载化Ⅳ．活性炭在酸性介质中对硅钼（SiMo_（12））和磷钼（PMo_（12））杂多酸的吸附

在氢离子浓度均为３ｍｏｌ／Ｌ的硫酸，盐酸，磷酸，醋酸水溶液中和冰醋酸中研究了具有Ｋｅｇｇｉｎ结构的硅相（ＳｉＭｏ（１２））和磷钼（ＰＭｏ（１２））杂多酸在不同来源活性炭上的吸附作用，在酸性介质中，其吸附量均比在水溶液中有所增加，但如果考虑吸附量与体系酸强度之间的关系，实验结果表明，ＳｉＭｏ（１２）和ＰＭｏ（１２）之间存在着不同的规律。

杂多酸在活性炭上的固载化Ⅲ．活性炭在酸性介质中对钨硅杂多酸（SiW_（12））的吸附

在氢离子浓度均为３ｍｏｌ／Ｌ的硫酸，盐酸，磷酸，醋酸水溶液中和冰醋酸中研究了具有Ｋｅｇｇｉｎ结构的硅钨杂多酸（ＳｉＷ＿（１２））在不同来源活性炭上的吸附作用。各活性炭对ＳｉＷ＿（１２）吸附等温线的形式是不相同的，吸附剂载体的微孔结构以及杂多酸的溶剂化起着重要的作用。并且在无机酸介质中，杂多酸的吸附量比在水溶液中成规律性地增加，且与酸强度成正比关系。在有机酸介质中，吸附作用比较复杂。根据所得结果，提出了在酸性介质中杂多酸在活性炭表面的吸附模型。

PES／PC共混体系的相容性与力学性能

ＰＥＳ／ＰＣ共混体系的相容性与力学性能姜振华，马荣堂，寇喜春，安立佳（吉林大学化学系长春）（中国科学院长春应用化学研究所长春１３００２２）关键词聚醚砜，聚碳酸酯，共混物，力学性能聚醚砜（ＰＥＳ）是一种性能优异的特种工程塑料，它具有强度高、刚性大、耐热...

COMPATIBILIZATION AND STRUCTURE OF POLY(PROPYLENE) NYLON-12 BLENDS

In this paper, scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) were used to study the structure and compatibilization of poly(propylene) (PP)/nylon-12 (PA 12) blends. The compatibilizatio

Characterization of 1:12 Phosphomolybdic Anions Doped Polypyrrole (PMo12/PPy) Film Electrode

1:12 phosphomolybdic anion doped polypyrrole film electrode was characterized by in-situ UV-vis spectroelectrochemistry, X-ray photoelectron spectroscopy(XPS), scan electronic microscopy(SEM) and electron spin resonance(ESR) spectroscopy.

水合希土硝酸盐与本并及单环己基－12－冠－4配合物的合成、性质及晶体结构

在乙腈介质中合成了苯并－１２－冠－４（简称Ｂ－１２－Ｃ－４）和单环己基－１２－冠－４（简称Ｃｙ－１２－Ｃ－４）的六种希土配合物：ＲＥ（ＮＯ３）３·Ｂ－１２－Ｃ－４（ＲＥ＝Ｐｒ，Ｇｄ，Ｙｂ，Ｌｕ），ＲＥ（ＮＯ３）３·Ｃｙ－１２－Ｃ－４（ＲＥ＝Ｌａ，Ｌｕ）．研究了它们的ＩＲ及１ＨＮＭＲ性质，并测定了四种单晶的结构．用ＩＮＤＯ法计算了Ｌｕ（ＮＯ３）３·Ｂ－１２－Ｃ－４，Ｌｕ（ＮＯ３）３·Ｃｙ－１２－Ｃ－４的电子结构．结果表明．Ｂ－１２－Ｃ－４与希土的配合物稳定性按Ｐｒ，Ｇｄ，Ｙｂ，Ｌｕ顺序减弱，并且Ｃｙ－１２－Ｃ－４与希土的配位能力大于Ｂ－１２－Ｃ－４．发现冠醚分子通过自身不同程度的扭曲，改变冠醚环空穴的大小，实现与不同大小的希土离子的配位作用．

杂多酸的固载化Ⅲ．溶剂对H_4SiW_（12）O_（40）·24H_2O在活性

研究了Ｈ＿４ＳｉＷ＿（１２）Ｏ＿（４０）·２４Ｈ＿２Ｏ（ＳｉＷ＿（１２））在水、乙醇、乙酸、乙酸丁酯中在活性炭上的吸附得出，活性炭微孔结构对ＳｉＷ＿（１２）在其表面的吸附起着分子筛作用。水溶剂化的ＳｉＷ＿（１２）分子可顺利进入活性炭１．７ｎｍ左右的微孔，而其它溶剂化的ＳｉＷ＿（１２）分子，则需较大的孔径。提出了ＳｉＷ＿（１２）在活性炭表面吸附的微孔中孔扩散模型。

（C_（12）H_8）~（2＋）离子中电荷定位的理论研究

本文用半经验量子化学方法ＭＮＤＯ研究了由联苯衍生物产生的［Ｃ１２Ｈ８］２＋双电荷离子的结构，讨论了其中的电荷定位和影响离子稳定性的因素，双电荷离子的两个电荷分别定位于两个苯环上，表明该离子是由联苯衍生物经两步反应产生。

HOST-GUEST INTERACTIONS OF THIAMINE WITH ANIONS - CRYSTAL-STRUCTURE OF THIAMINE IODIDE SESQUIHYDRATE

The crystal structure of thiamine iodide sesquihydrate has been determined by X-ray diffraction methods as a host-guest model for coenzyme-substrate interactions. The asymmetric unit contains two chemical units. Both the thiamine molecules A and B, which are crystallographically independent, assume the usual F conformation and have a disordered hydroxyethyl side chain. An iodide anion (or a water molecule) bridges the pyrimidine and thiazolium rings of molecule A (or B) by forming a hydrogen bond with the amino group and an electrostatic contact with the thiazolium ring to stabilize the molecular conformation. In the crystal the thiamine molecules self-associate to form a pipe-like polymeric structure, in which four thiamine hosts surround an iodide guest and hold it through C(2)-H...I hydrogen bonds and thiazolium...I electrostatic interactions. Crystal data: C12H17N4OS+.I- . 1.5 H2O, monoclinic, P2(1)/c, a = 12.585(2), b = 25.303(5), c = 12.030(2) angstrom, beta = 115.15(1)degrees, V = 3468(1) angtrom3, Z = 8, D(c) = 1.606 g cm-3, R = 0.045 for 3328 observed reflections.

THE CLEAVAGE REACTION OF THE MO-MO TRIPLE BOND - THE CRYSTAL-STRUCTURES OF MOLYBDENUM COMPLEXES [CPMO(CO)(2)(C(5)H(4)NS)], [CPMO(CO)(2)(C(9)H(6)NS)]O=PPH(3) AND [CPMO(CO)(2)(S(2)CNME(2)]

The reactions of [Cp2Mo2(CO)4] (1) with 2,2'-dipyridyl disulphide (C5H4NS-)2, 8,8'-diquinolyl disulphide (C9H6NS-)2 and tetramethyl thiuram disulphide (Me2NC(S)S-)2 in toluene solution resulted in the cleavage of the Mo-Mo triple bond to yield molybdenum complexes [CpMo(CO)2(C5H4NS)] (2), [CpMo(CO)2(C9H6NS)] (3) and [CpMo(CO)2(S2CNMe2)] (4), respectively. The molecular structures of 2, 3 . O=PPh3 and 4 were determined by X-ray diffraction studies. Crystals of 2 are monoclinic, space group P2(1)/n, with Z = 4, in a unit cell of dimensions a = 6.448(1), b = 12.616(2), c = 14.772(2) angstrom, beta = 92.85(1)-degrees. The structure was refined to R = 0.028 and R(w) = 0.039 for 1357 observed reflections. Crystals of 3 . O=PPh3 are triclinic, space group P1BAR, with Z = 2, in a unit cell of dimensions a = 11.351(3), b = 13.409(3), c = 9.895(2) angstrom, alpha = 94.59(2), beta = 90.35(2), gamma = 78.07(2)-degrees. The structure was refined to R = 0.033 and R(w) = 0.037 for 3260 observed reflections. Crystals of 4 are monoclinic, space group P2(1)/a and Z = 4 with a = 12.468(5), b = 7.637(2), c = 13.135(4) angstrom, beta = 96.62(3). The structure was refined to R = 0.032 and R(w) = 0.042 for 1698 observed reflections. Each of complexes 2-4 contains a cyclopentadienyl ligand, a cis pair of carbonyls and a chelate ligand (S,N donor or S,S donor). All the compounds have distorted square-pyramid structures.

STUDY OF A 1/12 PHOSPHOMOLYBDIC ANION DOPED POLYPYRROLE FILM ELECTRODE AND ITS CATALYSIS

A phosphomolybdic anion doped polypyrrole (PMo12O403- + PPy) film electrode has been prepared by electrochemical polymerization of pyrrole in an aqueous solution of 0.5 mol l-1 H2SO4 or 0.5 mol l-1 KNO3 containing PMo12O403- anions, and characterized by scanning electron microscopy and in-situ UV-visible spectroelectrochemical methods. The film electrode obtained is very stable upon potential cycling in acidic solution, but not in neutral solution. The catalytic effect of the film electrode on the reduction of ClO3- and BrO3- was studied.

溶胶-凝胶法制备Y_3Al_5O_(12)超微粉末

使用溶胶-凝胶法制备了平均粒径为20～150nm的Y_3Al_5O_(12)超微粉末。从凝胶至超微粉末的过程中,发生了较大的失重现象。纯相晶态的Y_3Al_5O_(12)超微粉末的最低生成温度为900℃。粉末平均粒径随着灼烧时间的增加而逐渐增大,随着灼烧温度的增加而显著增大。

KHoP_4O_(12)晶体结构特性的研究

用蒸发溶液法从磷酸溶液中培养出两种形态的 KHoP_4O_(12)单晶,晶体结构测定表明是两种不同结构,即α型和β型。用 X 光衍射、显微镜、红外光谱和热分析方法研究了晶体的结构特性,并对结果进行了讨论。