Silver Nanoparticles Produced by Magnetron Sputtering and Selective Nanodecoration onto <i>α</i>-Cyclodextrin/Carboxylic Acid Inclusion Compounds Crystals

In this work, we report the preparation of silver nanoparticles (AgNPs) and the nanodecoration of α-cyclodextrin inclusion compounds (α-CD IC) microcrystals that contain palmitic (PAc) and stearic acids (SAc) like guest molecules. These IC provide a suitable environment for nucleation, epitaxial growth and immobilization of AgNPs that were obtained by the magnetron sputtering technique. The use of α-CD IC substrates with a specific surface morphology in which the functional group of the guest molecule faces outward preferentially from a crystal plane, is an efficient method for the preparation of AgNPs with a low size dispersion, which is probably due to the high affinity between the functional group of the surfactant carboxylic acid guest with the metal nanoparticles.

Formation and Characteristics of Acrylonitrile/Urea Inclusion Compound

The formation process and composition of the acrylonitrile/urea inclusion compounds （AN/UIC） with different aging times and AN/urea molar feed ratios are studied by differential scanning calorimetry （DSC） and X-ray diffraction （XRD）. It is suggested that DSC can determine the guest/host ratio and the heat of decomposition. Meanwhile, the guest/host ratio and heat of decomposition are obtained, which are 1.17 and 5361.53 J/mol, respec- tively. It is suggested AN molecules included in urea canal lattice may be packed flat against each other. It is found that the formation of AN/UIC depends on the aging time. XRD results reveal that once AN molecules enter urea lattice, AN/UIC are formed, which possess the final structure. When AN molecules are sufficient, the length of AN molecular arrays in urea canals increases as aging time prolonging until urea tunnels are saturated by AN.

Synthesis and Crystal Structure of an Inclusion Compound Constructed through Self-assembly of Nicotinamide and Dicyanamide Coordination Bridges

A novel inclusion compound of [Mn（dca）2（3-nic）2]n·（3-nic）2n（1,dca = dicyanamide,3-nic = nicotinamide） has been prepared and characterized by single-crystal X-ray diffraction,elemental analysis and IR.This complex crystallizes in the triclinic system,space group P1 with a = 7.5979（8）,b = 7.7128（9）,c = 14.5346（17）,α = 100.094（2）,β = 92.444（2）,γ = 116.736（2）o,V = 741.72（15） 3,Z = 1,Dc = 1.512 g/cm3,Mr = 675.55,μ = 0.507 mm-1,F（000） = 347,S = 1.023,the final R = 0.0400 and wR = 0.1010.The inclusion compound is constructed by a three-dimensional host network that consists of dca,3-nic and Mn2＋ with coordination and hydrogen-bonding interactions.In the network,one-dimensional rectangular channels are formed,and the guest molecules（3-nic） are included in the channels.The guest molecules interlink with the host through strong hydrogen bonds.

Multiform Host Lattices in the Layer Type Inclusion Compound of Thiourea with Tetrabutylammonium Salicylate and Water

A new inclusion complex thiourea with tetrabutylammonium salicylate and water, 4(C4H9)4N+C7H5O3 ?4(NH2)2CS?2H2O, has been prepared and characterized by X-ray crystallo- graphy. Crystal data: MoKα radiation, triclinic, space group P1 with a = 13.505(5), b = 13.645(5), c = 30.720(10) ?, α = 92.872(7), β = 92.329(7), γ = 92.538(7)°, V = 5643.0(3) ?3, C96H184N12O14S4, Mr = 1858.79, Z = 2, Dc = 1.094 g/cm3, μ = 0.143 mm-1, F(000) = 2040, R = 0.0694 and wR = 0.1282 for 4303 observed reflections with I > 2σ(I). There are three different layer type host-lattices in the crystal structure of the title compound. All of them are formed by [(NH2)2CS·(C7H5O3 )]4 tetramers, but water molecules are located between tetramers and link them by hydrogen bonds to generate ribbons at c = 0 and 1/2, and isolated tetramers are arranged side by side at c = 1/4. The tetrabutylammonium cations are sandwiched between puckered layers.

Two Polymorphs of the Inclusion Compound [(n-C_4H_9)_4N]^+·(C_(13)H_9O_3)^-·H_2O

Two polymorphs of the inclusion compound [（n-C4H9）4N]＋＇（C13H903）H2O have been prepared and characterized by X-ray crystallography. Polymorph 1： triclinic P1, a = 13.4982（2）, b = 13.5743（2）, c = 17.1996（2） A, at = 67.045（1）,β = 77.845（1）, γ= 88.762（1）°, V = 2830.43（7） A3, Z = 4, R = 0.0491, wR= 0.1276; Polymorph 2： tetragonal P43, a = b = 13.53690（1） A, c = 30.8491（8） A, V = 5653.02（16） A3, Z = 8, R = 0.0448, wR = 0.0984. In these two crystal structures, the hydrogen-bonded ribbons built of 4,4＇-dihydroxybenzophenone （DHBP, C13H1003） anions and water molecules are orderly arranged to generate two-dimensional host layers, with tetrabutylammonium cations contained between the layers to form the sandwich-like inclusion compounds. The structures of 1 and 2, which exist as two polymorphs, both display the similar packing pattern and hydrogen-bond linking model.

基于LEO/β-CD的长效芳香功能皮革的研究

为提高芳香皮革的留香性能,以蓝湿革为原料皮,β-环糊精包合薰衣草香精(LEO/β-CD)为香料,以加香后皮革的刺激性气味强度、香气浓度、香气舒适度、柔软度等为评价指标,采用正交设计法对复鞣、加脂、套色工序的加香工艺进行优化,并考察在不同温度下的留香性能。结果表明,薰衣草芳香皮革的最佳制备工艺为:复鞣工序的LEO/β-CD添加量为0.1%,加脂工序用量0.5%,套色工序用量0.2%;该芳香皮革的留香性能远高于普通芳香皮革,可在常温下存放6个月。利用β-环糊精包合香料制备的芳香皮革具有长效留香性能,这为制备芳香功能皮革提供了一种新思路。

The Molecular and Crystal Structure of an Inclusion Compound Formed between Acetylferrocene Pyridine-2, 6-diformylhydrazone and Ethanol

: The crystal structure of an inclusion compound formed between acetyl-ferrocene pyridine-2, 6-diformylhydrazone and ethanol was report in the present work.The crystal of C33,H35N5O3Fe2 is monoclinic, space group C2/c with a = 23. 249 (3 ), b=ll. 576(2), c=22. 794(4) A, β=103. 53(l)’, V=5964(1) A3, Mr=66l- 37, Z=8, Dc= 1. 473g/cm3, F (000) = 2752. 00, μ = 10. l5 cm-1. It was found that theethanol molecule present in the crystal lattice depends on the van der Waals force ratherthan hydrogen bonding.

Inclusion Complex of Paclitaxel in Hydroxypropyl-β-cyclodextrin

Introduction Paclitaxel （as Taxol） is a kind of diterpenoid natural product extracted from Chinese yew. It has been reported to have high anti-tumor effects, such as the activity against oophorama, mammary cancer, encephaloma, cervical carcinoma, and non- small-cell lung carcinoma. One of the major problems of paclitaxel applied to therapy is its extremely low solubility in water. In addition, paclitaxel is administered as a slow infusion in a vehicle consisting of Cremophor EL （ polyoxyethylated castor oil ）. However, Cremophor has been observed to cause severe, occasionally fatal hypersensitivity reactions in animals and humans. Therefore, paclitaxel therapy includes a prophylactic regimen of antihistamines and corticosteroids , along with a prolonged infusion time to reduce the severity and incidence of hypersensitivity reactions. Because of the reasons mentioned above, currently its preparation needs to be improved further.

Inclusion Behavior of Dimer β-CyclodextrinBridged with Aspartic Acid Derivative

The (β-cyclodextrin (CD) dimer bridged with aspartic acid (ASP) derivative, FITC-ASP(NH-(-CD)2 (Host, FITC=fluorescein-4-isothiocyanate), was synthesized. Fluorescence polarization study showed that the novel host formed an inclusion compound, [FITC-ASP(NH-(-CD)2]ATA, for which Kd was determined to be 5.0×10-6 mol/L by Beacon 2000 Analyzer, when ATA (Guest) = Adm-Trp-Arg-Arg-NH2 (Adm = 1-adamantanecarboxylic acid, Trp = tryptophan, Arg = arginine), where Kd is the dissociation constant in aqueous solution at 298 K.

β-胡萝卜素与β-CD包结物的制备及其稳定性

用紫外 -可见光谱法研究了 β 胡萝卜素与 β 环糊精的生成和包结常数。结果表明 ,1分子 β 胡萝卜素与 3.2 5分子β 环糊精分子依据范德华作用力和疏水作用力发生包结作用 ,生成稳定的包结物。包结物适宜的制备条件为 :β 环糊精与 β 胡萝卜素的摩尔比为 3.2 5∶1 ,主客体溶液的浓度比为1 2∶1 ;包结温度 30℃ ;反应时间 2h。包结物的生成常数为9.4 6× 1 0 1 1 L/mol,包结物稳定。包结物中的 β 胡萝卜素在光氧存在条件下不易降解 。

镁熔体净化技术的研究进展

镁作为新兴轻质材料在汽车、3C和航空航天领域的应用逐渐普及,伴随行业节能减排的要求提升以及材料行业的迭代更新,镁及其合金所涉及的产业领域将会进一步扩大。而镁及其合金在铸造与变形加工前,镁熔体纯净度会对其性能产生巨大影响,如熔体纯净度低会显著降低合金的抗拉强度、伸长率等力学性能,导致合金出现炸裂、破损现象。为此,镁熔体的高效除气除杂净化技术成为研究热点。镁熔体净化作为镁熔炼过程中的重要环节,一直是科研工作者不断改进优化的研究课题。本文在简要介绍镁熔体中夹杂物来源的基础上,归纳了适用于镁熔体的熔剂净化、无熔剂净化、复合净化法及其净化效果,且对真空蒸馏法净化镁熔体的相关研究进行了探讨,系统综述了镁熔体净化技术研究进展,展望了该技术的未来研究方向。

黄芩苷-β-CD包合物胶囊的制备和体外溶出度测定

目的:研究黄芩苷-β-CD包合物的制备方法及其胶囊体外溶出度的测定。方法:用正交试验优选黄芩苷-β-CD包合物的最佳制备条件,采用饱和水溶液法制备包合物;并分别将黄芩苷-β-CD包合物和黄芩苷与β-CD物理混合物制成胶囊,以蒸馏水为溶出介质,采用桨法测定体外溶出度,比较黄芩苷-β-CD包合物胶囊与黄芩苷和β-CD物理混合物胶囊的溶出速度和溶出量。结果:黄芩苷与β-CD的最佳包合条件为:黄芩苷与β-CD的比例为1:2.5,包合时间为1.5h,包合温度为65℃;黄芩苷-β-CD包合物胶囊的体外累积溶出度大于黄芩苷与β-CD物理混合物胶囊。结论:黄芩苷-β-CD包合物制备工艺简单易行,包合物胶囊水溶性好,体外溶出快。

用均匀设计CO_2超临界混合萃取当归、川芎、香附中挥发性成分及提取物β-CD包合的研究

目的 考察超临界流体CO2 萃取当归、川芎和香附中挥发性成分及所得混合挥发油的 β 环糊精包合物的制备工艺。方法 均匀设计方法 ,正交实验法。结果 萃取条件是 :萃取压力 30Pa ,萃取温度 6 0℃ ,解析温度Ⅰ 6 0℃ ,解析温度Π30℃ ,萃取时间 4 .0h。β CD包合物的制备最佳工艺条件是 :水 ,油与 β CD之比为 1∶10 (mL) ,研磨法 ,时间 6 0min。结论 确定了CO2 超临界混合萃取方法及挥发油的 β

杞黄颗粒中挥发油提取和β-CD包合工艺的研究

目的考察杞黄颗粒中挥发油的最佳提取工艺和β-CD最佳包合工艺。方法采用单因素以收油率作为评价提取工艺的指标;以包合物收得率和挥发油包合率的综合评分作为评价包合工艺的指标优选β-CD包合工艺。结果挥发油最佳提取工艺为:莪术加水6倍量,浸泡12 h,提取6 h;挥发油的最佳包合工艺为采用饱和水溶液法在一般温度下β-CD与挥发油的配比为6∶1,水与挥发油的配比为60∶1,包合时间为45 min。结论所选提取工艺提取率高,包合工艺合理可行。

β-CD与α-巯基苯并咪唑包合物的合成及表征

报道了 β CD与α 巯基苯并咪唑包合物的合成及表征 .通过元素分析、红外光谱分析、X射线衍射分析等测试表明 ,具有圆筒状晶格结构的 β CD(主体 )与α 巯基苯并咪唑 (客体 )在一定条件下通过弱相互作用而生成新物质———包合物 ,其组成为 (C6H10 O5 ) 7·C7N2 H6S .该化合物属于超分子 .

枳香胶囊中挥发油提取和β-CD包合工艺的研究

目的考察枳香胶囊中枳实、高良姜、肉桂、荜茇等挥发油的最佳提取工艺和β-环糊精最佳包合工艺。方法采用单因素及L9(34)正交实验设计,以收油率作为评价提取工艺的指标优选提取工艺;以包合物收得率和挥发油包合率的综合评分作为评价包合工艺的指标优选β-CD包合工艺。结果挥发油最佳提取工艺为:加水10倍量,浸泡2.5 h,提取5h;挥发油的最佳包合工艺为采用饱和水溶液法,β-环糊精与挥发油的配比为8∶1,包合温度为60℃,包合时间为75 min。结论所选提取工艺提取率高,包合工艺合理,节约成本。

DM-β-CD对盐酸二氢埃托啡离体鼻黏膜渗透的影响

目的:考察不同条件下二甲基-β-环糊精(DM--βCD)对盐酸二氢埃托啡促渗作用的影响。方法:采用透皮实验用扩散池装置用于透黏膜实验,HPLC法测定黏膜渗透药量,分别考察DM-β-CD的质量浓度和加入方式对渗透的影响。结果:DM-β-CD的质量浓度与黏膜渗透率不呈线性关系,DM-β-CD的加入方式对黏膜渗透速率有较强的影响。结论:促渗剂质量浓度为10 mg.mL-1,以超声包合法制备DM-β-CD和盐酸二氢埃托啡的包合物,可使渗透速率达到最大。

表面张力法研究6-OTs-β-CD-CTAC超分子体系

用表面张力法研究了288K时6-OTs-β-CD与十六烷基三甲基氯化铵(CTAC)形成的超分子包络物及CTAC的表观临界胶束浓度(CMC*)与6-OTs-β-CD浓度的关系。研究发现,CTAC与6-OTs-β-CD可形成包结比为2∶1的超分子包络物,包络物表观稳定常数为2.0×103L/mol。表面活性剂的表观临界胶束浓度(CMC*)与环糊精的浓度呈较好的线性关系。

1-甲基-3-(2-甲基环丙基)-1-环丙烯/Cu-β-环糊精(1-MMCPCP/Cu-β-CD)包合物的合成方法

利用β-环糊精成功地制备合成得到粉末状1-甲基-3-(2-甲基环丙基)-1-环丙烯/Cu-β-环糊精(1-MMCPCP/Cu-β-CD)包合物。经傅里叶转换红外光谱分析(FT-IR)、X射线衍射分析(XRD)、气相色谱-质谱联用分析(GC-MS)、核磁谱(NMR)表征分析证明,得到的1-MMCPCP/Cu-β-CD包合物是1-甲基-3-(2-甲基环丙基)-1-环丙烯(1-MMCPCP)和Cu-β-CD络合物两者分子之间通过一定的相互作用力结合形成的新物相。以失重法测得本实验所得的1-MMCPCP/Cu-β-CD包合物中1-MMCPCP有效含量为2.4%±0.1%。