SILAR法制备化学计量CuInS2薄膜

在室温下，以不同c_Cu/c_In的CuCl₂和InCl₃混合溶液作为阳离子前驱体，Na₂S水溶液为硫源，利用连续离子层吸附反应法(SILAR)在玻璃基底上制备了CuInS₂薄膜。XRD结果表明，当c_Cu²⁺/c_In³⁺在1～1.5范围内均可形成具有黄铜矿结构的CuInS₂薄膜。SEM观察到随c_Cu²⁺/c_In³⁺的升高，薄膜表面颗粒长大并出现团簇聚集。通过XPS测定薄膜表面的化学组成证明当c_Cu²⁺/c_In³⁺=1.25时，CuInS₂薄膜接近其标准的化学计量组成。此时薄膜的吸收系数大于>10⁴ cm^-1，禁带宽度E_g为1.45 eV。     

羟基磷灰石/氧化锆复合涂层热稳定性和结合强度的研究

为了提高羟基磷灰石(hydroxyapatite，HA)涂层的结合强度，采用水热电沉积法在HA涂层中引入第二相颗粒氧化锆(ZrO₂)制备HA/ZrO₂复合涂层，研究了ZrO₂晶型对涂层表面形貌、相组成、热稳定性和涂层结合强度的影响。实验结果表明，ZrO₂的复合减小了HA晶体尺寸，但不影响HA水热电沉积的机理；1 200 ℃热处理后，HA分解生成的CaO和ZrO₂形成固溶体，使单斜晶型(m-ZrO₂)和四方晶型(t-ZrO₂)的ZrO₂转变为立方晶型的的ZrO₂(c-ZrO₂)，并促进HA的完全分解；HA/ZrO₂复合涂层的结合强度明显高于纯HA涂层的结合强度，且随涂层中ZrO₂含量增大和热处理温度的升高而增大。1 000 ℃热处理后，HA/ZrO₂复合涂层既有较高的结合强度，又可获得对骨生长有利的HA+β-Ca₃(PO₄)₂(β-TCP)双相结构。     

2,5-二乙氧甲酰氨基-1,3,4-噻二唑超分子化合物的合成和晶体结构

报道了一种用1,6-二取代二硫脲在DMF中加热回流直接脱H₂S关环合成2,5-二取代1,3,4-噻二唑类化合物的新方法, 并用此方法合成了2,5-二乙氧甲酰氨基-1,3,4-噻二唑. 用元素分析、核磁共振氢谱、红外光谱进行了表征, 用X射线单晶衍射法确定了其单晶结构. 晶体属单斜晶系, P2₁/c空间群, a＝1.0093(4) nm, b＝0.9035(4) nm, c＝1.2924(6) nm, β＝96.785(9)°, V＝1.1703(9) nm³, Z＝4, D_c＝1.477 g/cm³, F(000)＝544, μ＝0.287 mm^－1. 该化合物通过分子间氢键形成了一种二维网状结构的超分子, 由于分子间的作用力使其分子又沿c轴呈层状堆积.     

一个新的三维配位聚合物Na[Cu2(malonate)2]·(ClO4)·(H2O)2的合成与表征(英)

通过Cu(ClO₄)₂和丙二酸在水溶液中的自组装合成了一个新的3D配位聚合物：Na[Cu₂(malonate)₂]·(ClO₄)·(H₂O)₂。X-射线结构分析表明该化合物晶体属于正交晶系Pnma空间群(a=1.256 5(3)，b=1.0594 3(2)，c=1.0755 6(14) nm，V=1.431 7(4) nm³，Z=4)。该聚合物的空间堆积在沿b轴和c轴方向分别形成大小为0.98 nm × 0.83 nm和0.40 nm × 0.40 nm的方形孔洞，在沿a轴方向形成大小为0.85 nm × 0.40 nm的砖墙形孔洞。磁性测试结果表明该化合物显示出铁磁性。导电性能测试实验表明它是一个半导体，经拟合得到其活化能为0.80 eV。     

含大环[Ni([15]aneN5]2+氰基桥联四核簇合物的合成、结构和磁性质

用1,4,7,10,13-五氮十五烷(cpad)作为端基配体,合成了2个同构化合物[{Ni(cpad)}₃M(CN)₆]₂[M(CN)₆](ClO₄)₃·6H₂O (M=Cr³⁺,1;Fe³⁺,2),其中[M(CN)₆]^3-通过氰基桥联配位,4个[Ni(cpad)]²⁺阳离子形成四核簇[{Ni(cpad)}₃M(CN)₆]³⁺,游离的[M(CN)₆]^3-和ClO₄^-为平衡阴离子。晶体参数如下：1,三方晶系,P3c1空间群,a=1.5144 1(18) nm,c=3.080 7(6) nm,V=6.118 9(15) nm³,Z=2;2,三方晶系,P3c1空间群,a=1.4976 2(17) nm,c=3.087 8(5) nm,V=5.997 6(14) nm³,Z=2。变温磁化率显示在四核簇内氰基桥联的金属离子之间存在铁磁相互作用。     

一个不常见的Ni(Ⅱ)的戊三酮二水杨酰腙配合物的合成和晶体结构

合成了镍的戊三酮二水杨酰腙配合物Ni(C₁₉H₁₆N₄O₅)的两个同质异晶,测定其晶体结构。该配合物的两个晶体均属单斜晶系,空间群为C2/c,晶体1晶胞参数为:a=1.03076(9)nm,b=1.9105(1)nm,c=0.93305(8)nm,β=101.490(4)°,Z=4,μ=1.119mm^-1,R=0.0370;晶体2晶胞参数为:a=2.1949(3)nm,b=0.9901(2)nm,c=0.8568(1)nm,β=92.799(6)°,Z=4,μ=1.084mm^-1,R=0.0440。两个晶体中镍原子由多啮配体的二个酰氧原子和二个肼氮原子形成平面正方形配位。对配合物的红外光谱进行归属。     

配合物{(n-Bu)2Sn[(η5-C5H5)Fe(η5-C5H4)COO]2}2的合成、谱学表征及晶体结构

合成了新型配合物{(n-Bu)₂Sn[(η⁵-C₅H₅)Fe(η⁵-C₅H₄)COO]₂}₂，用元素分析、红外光谱和核磁共振谱( ¹H、¹³C、¹¹⁹Sn)进行了表征，并用X-射线单晶衍射分析法测定其晶体结构。晶体属单斜晶系，空间群P2₁/c，晶胞参数a=11.753(4)?，b=21.133(7)?，c=23.374(9)?，β=101.62(3)°，V=5687(4)?³，Z=4，D_c=1.614Mg·m^-3，μ(MoKα)=1.912mm^-1，F(000)=2800，最终可靠因子R₁=0.0827，wR₂=0.2085。配合物分子呈中心对称，是具有Sn₂O₂中心内环的二聚体结构;每个锡原子与5个O原子和2个C原子形成扭曲的五角双锥几何构型，其中5个O原子为赤道配位原子，而C-Sn-C为配合物的轴。     

共轭二茂铁席夫碱配合物的制备和电化学性质研究

合成了2个共轭二茂铁席夫碱配合物，用元素分析、红外光谱、紫外光谱、核磁共振等对它们进行了表征及电化学性质 研究，并用X射线衍射测定了它们的晶体结构。配合物1存在反演中心，其晶体属单斜晶系，P2₁/c空间群。晶体学数据为：a=1.148 5(2) nm，b=0.857 75(17) nm，c=1.194 4(2) nm，β=99.980(5)°,V=1.158 8(4) nm³,Z=2，μ=1.499 mm^-1,D_c=1.562 g·cm^-3，R₁=0.068 9，wR₂=0.128 0。     

3-(水杨酰肼)-丁基-2-酮肟和两个镍的酮肟配合物的合成和晶体结构

合成了3-(水杨酰肼)-丁基-2-酮肟H₂L(1，C₁₁H₁₃N₃O₃)和2个镍的3-(水杨酰肼)-丁基-2-酮肟化合物[Ni(HL)(CH₃COO^-)(C₅H₅N)₂](2)和[Ni(HL)₂]·2C₃H₇NO（3）。化合物1晶体属单斜晶系，空间群为P2₁/n，晶体学参数为：a=0.451 87(2) nm，b=2.086 8(1) nm，c=1.224 48(9) nm，β=94.974(3)°，V=1.150 3(1) nm³，Z=4，D_c=1.358 g·cm^-3，μ=0.101 mm^-1，F(000)=496，R=0.0435，wR=0.142 5。化合物2晶体属单斜晶系，空间群为P2₁/n，晶体学参数为：a=1.362 39(8) nm，b=1.345 37(6) nm，c=1.438 54(7) nm，β=113.138(3)°，V=2.424 6(2) nm³，Z=4，D_c=1.398 g·cm^-3，μ=0.843mm^-1，F(000)=1 064，R=0.042 4，wR=0.116 6。化合物3晶体属单斜晶系，空间群为P2₁/c，晶体学参数为：a=1.104 22(7) nm，b=2.860 1(1) nm，c=1.114 13(7)nm，β=114.589(5)°，V=3.199 5(3) nm³，Z=4，D_c=1.398 g·cm^-3，μ=0.667 mm^-1，F(000)=1 416，R=0.057 6，wR=0.1535。在化合物1晶体中，酮肟分子之间通过分子间氢键形成二维网状结构。在化合物2中，每个镍(Ⅱ)离子由1个3-(水杨酰肼)-丁基-2-酮肟的2个氮原子和1个氧原子，2个吡啶分子中的2个氮原子和1个乙酸根中的1个氧原子形成畸变的NiN₄O₂八面体配位构型，存在分子内氢键O-H(肟)…O(乙酸根)和O-H(酚)…N(酰肼)。在化合物3晶体中，每个镍(Ⅱ)离子由2个3-(水杨酰肼)-丁基-2-酮肟的4个氮原子和2个氧原子配位，形成畸变的NiN₄O₂八面体配位构型。晶体中存在O-H…O和O-H…N两种分子内氢键和O-H…O分子间氢键。     

二硝酸根(N, N, N'', N''－四正丁基丙二酰胺)合铀酰(Ⅱ)配合物的合成和结构

配合物[UO₂(Bu₂NCOCH₂CONBu₂)(NO₃)₂]晶体属单斜晶系,P2₁/c空间群,a=10.744(2),b=13.229(5),c=20.011(8)β,β=99.21(3)°,V=2808(2)β³,D_c=1.07g·cm^-3,Z=4,配合物分子中具有直线结构的铀酰离子由六个氧原子配位,其中四个来自硝酸根,另外两个来自羰基,形成平面六角形,六角形的平面与铀酰离子的直线垂直,两个硝酸根处于相邻位置.     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

Synthesis of pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles by Curtius reaction in Morita-Baylis-Hillman derivatives

Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described.     

正丁胺对激光染料荧光谱影响的研究

用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在.     

Cu0-catalysed 1,3-dipolar cycloadditions of α-amino acid derived N,N-cyclic azomethine imines to ynones

A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu⁰ as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than Cu^I in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT).     

Synthesis and antioxidative/anti-inflammatory activity of novel fullerene–polyamine conjugates

(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C₆₀, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine.