纳米自组装聚电解质超薄多层膜

相反电荷的聚电解质在溶液中通过静电相互作用自组装形成超薄多层膜，这种膜的结构可实现分子水平上的控制。就其复合、结构及其影响因素、以及应用进行了概述。     

电化学交流阻抗技术表征自组装多层膜

采用电化交流阻抗技术对一种新型电极表面修饰的自组装多层膜进行表征,通过阻抗谱分析,得出电荷传递电阻和双电层电容与膜层数的关系,证明该多层膜随数增加具有均匀增长,结构致密等特性.     

分子组装技术制备超晶格的研究进展

总结了分子组装技术及超晶格研究的历史, 介绍了分子组装技术制备超晶格的几种方法。     

纳米半导体硫化银单层膜的自组装

本文使用Triton X-100作为模板剂制备半导体硫化银纳米颗粒,并研究了其吸收光谱的兰移特性。在金属铝或金基底上自组装有机双功能分子单层膜后,将其浸入所制备的纳米硫化银颗粒的微乳液中,自组装得到硫化银纳米颗粒单层膜并研究了其表面形貌特征。     

高效率变色WO3多聚体/1,10-DAD自组装薄膜的制备

新型复合材料能够将多种特异性能结合在一种材料上,为未来的光电材料提供了广阔的应用前景[1,2].无机光电致变色材料因其在信息显示、传感器、调光器件和高密度存储等领域有显著的应用前景而倍受人们的关注[3－6].一般常规方法(物理沉积方法和化学沉积方法等)制备的半导体氧化物光电致变色材料存在着结构无定形、变色响应较慢、变色可逆疲劳等问题,限制了其进一步的应用.分子沉积膜（MolecularDeposition）技术[7,8]能有效构建纳米量级上高度有序的介观结构复合材料,能为新型无机变色材料的设计和构建提供技术支持.　　本研究组已成功地…     

WO3/4,4′-联苄胺光致变色超晶格薄膜的研究

无机-有机超晶格薄膜材料的制备以及性质研究是目前国际上的研究热点.基于超分子化学自组装原理,利用自组装技术构建含有有机分子的光致变色纳米超晶格薄膜材料,是一种研制光致变色功能薄膜材料的新方法.此项研究能够为研制变色响应速度快的、稳定性好的、变色可调控的光致变色器件奠定基础,具有深远的意义和重要的科学价值.本文采用溶液中相反电荷聚电解质自组装的方法(PEs法)[1],制备了WO3/4,4′-联苄胺超晶格薄膜;采用紫外可见吸收光谱和小角X-射线衍射谱对薄膜的层状结构和分子的排列方式进行了研究.     

光致变色WO3/4,4′-BPPOBp超晶格薄膜的制备

Layered WO3/4,4′-BPPOBp self-assemble mulitlayers (SAMs) films have been fabricated by polyelectrolytes (PEs) approach.The SAMs films with well-ordered superlattice structure and d-space of 0.695nm and good photochromic property have been studied by employing UV- visible,small angle XRD and XPS.     

光致变色WO3/4,4'-BPPOBp超晶格薄膜的制备

具有光致变色和电致变色特性的三氧化钨薄膜因其巨大的应用前景而倍受人们关注[1-4].其制备方法一般为物理沉积方法和化学沉积方法等.其中化学方法包括喷射裂解法[5],化学气相沉积法[6,7],电化学沉积法[8]和溶胶凝胶法[9]等.利用超分子化学自组装技术构建用有机组分调控的光致变色纳米超晶格薄膜材料,是研制光致变色功能薄膜材料的新方法.本文采用溶液中相反电荷聚电解质超分子自组装的方法(ＰＥｓ法)[10],制备了ＷＯ3/4,4′ＢＰＰＯＢｐ超晶格薄膜.采用紫外可见吸收光谱和小角Ｘ射线衍射谱对薄膜的结构和分子的排列方式进行了研究.1　实验…     

自组装超分子膜修饰电极的研制及分析应用

阐述了自组装超分子膜修饰电极的发展概况及超分子体系形成的理论基础，并对自组装超分子膜修饰电极的特点、电化学行为、功能膜的制备和表征方法以及它在电催化、生物传感器、离子选择性电极等方面的应用进行了综述。     

Preparation and Catalytic Activity of PW_(12)/PAn Material in Synthesis of 2-Methyl-2-Ethyl Acetoacetate-1,3-Dioxolane

Acetals and ketals are among the most important perfume materials and industrial materials of organic synthesis. Up to now, there are many methods to synthesize them. Conventionally H2SO4 is used as catalyst in factories, but it causes many problems, such as the erosion of equipment, difficulty for after-treatment, low quality of the products, etc. Heteropolyacids (HPA) and their salts have been extensively studied because of their interesting catalytic properties. Significant research effo…     

双亲性希土-邻苯二甲酸正十四醇单酯-邻菲咯啉三元配合物的合成、表征、荧光特性及成膜性能

合成了双亲性的铕、铽-邻苯二甲酸正十四醇单酯-邻菲咯啉三元混配配合物，用红外光谱及差热-热重谱进行了表征。考察了发光性能。研究了它们在空气-水界面上的单分子膜行为，结果表明均具有良好的成膜行为。     

Hydrothermal Synthesis of H3PW12O40/TiO2 Nanometer Photocatalyst and Its Catalytic Performance for Methyl Orange

H3PW12O40/TiO2 nanometer photocatalyst was prepared by one step hydrothermal synthesis from H3PW12O40′nH2O and Ti(OBu)4,simultaneously realizing the load and modification of H3PW12O40.The catalyst was ...     

Catalytic Oxidation of Dimethyl Ether to Dimethoxymethane over Cs Modified HaPW12O40/SiO2 Catalysts

The attractive utilization route for one-step catalytic oxidation of dimethyl ether to dimethoxymethane was successfully carried out over the H3PW12O40（40%）/SiO2 catalyst, modified by Cs, K, Ni, and V. The Cs modification of H3PW12O40（40%）/SiO2 gave the most promising result of 20% dimethyl ether conversion and 34.8% dimethoxymethane selectivity. Dimethoxymethane could be synthe- sized via methoxy groups decomposed from dimethyl ether through the synergistic effect between the acid sites and the redox sites of Cs modified H3PW12O40（40%）/SiO2.     

微波液相法一步合成H3PW12O40/Bi2WO6光催化剂及其脱氮性能

采用微波液相法一步合成了固载型H₃PW₁₂O₄₀/Bi₂WO₆光催化剂. 通过紫外-可见漫反射光谱(UV-Vis)、 场发射扫描电子显微镜(SEM)、 表面积及孔隙度(BET)测定、 氨气程序升温脱附(NH₃-TPD)、 吡啶吸附红外光谱(Py-FTIR)和X射线衍射(XRD)对所合成催化剂的结构和性质进行了考察, 并以吡啶浓度为15 mg/g的模拟油对光催化剂的脱氮效果进行评价. 结果表明, 与传统浸渍固载法相比, 微波液相一步法不仅能高效合成H₃PW₁₂O₄₀/Bi₂WO₆光催化剂, 且所合成的催化剂能被低能量的光激发. 固载H₃PW₁₂O₄₀不但能提高Bi₂WO₆纳米颗粒的表面酸量, 还能通过改变Bi₂WO₆前驱液的酸强度来调控催化剂形貌. 在H₃PW₁₂O₄₀固载量为15%(质量分数), 微波功率为800 W, 反应时间为90 min条件下得到的H₃PW₁₂O₄₀/Bi₂WO₆的光催化脱氮活性最高, 在催化剂与模拟油质量比为1/300, 500 W氙灯光照60 min的最佳光催化反应条件下, 模拟油脱氮率达到92.63%.     

Electrochemical Study of PW12O$\rm{_{40}^{3-}}$ in Poly(ethylene glycol) Electrolyte

The electrochemical properties of PW₁₂O (abbreviated as PW₁₂) anion in poly(ethylene glycol) (PEG) have been studied by cyclic voltammetry, complex impedance and FT‐IR spectroscopy. The PW₁₂ anion in PEG‐LiClO₄ electrolyte shows reasonable facile electrochemistry, and the diffusion coefficients of PW₁₂ were measured with microelectrode. It is shown that ionic conductivity of polymer electrolytes based on low molecular weight PEG can be improved by the addition of PW₁₂. The increase of conductivity is coupled with decrease of transient cross‐links density of polymer chains which is evidenced by the downshift of C? O? C stretching mode. The phenomena are explained in view of ion‐ion and ion‐polymer interactions.     

H3PW12O40/SiO2: An Eco‐Friendly Alternative for the Stereo‐, Regio‐ and Chemoselective Claisen‐Schmidt Condensation

H₃PW₁₂O₄₀/SiO₂ or (PW/SiO₂) promotes the regio‐, stereo‐ and chemoselective Claisen‐Schmidt condensation with improved yields.     

Fabrication of Self‐Assembled Tris(1,10‐phenanthroline) ruthenium/12‐Molybdophosphoric Acid Films with Bifunctional Electrocatalytic and Photoluminescent Properties

The thin films containing transition metal complex tris(1,10‐phenanthroline) ruthenium(II) Ru(phen)₃Cl₂ (abbr Ru(phen)₃, phen=1,10‐phenanthroline), and 12‐molybdophosphoric acid [PMo₁₂O₄₀]_3? (abbr PMo₁₂) were fabricated on quartz, silicon and ITO substrates by layer‐by‐layer (LBL) method. The LBL films were characterized by the UV‐vis spectroscopy, X‐ray photoelectron spectroscopy, atomic force microscopy and cyclic voltammetry. The films can catalyze both the reduction of ClO , BrO , IO , and the oxidation of C₂O due to the presence of bifunctional composite, and the redox potentials depend on pH as a result of protonation. The photoluminescence of films were also investigated. The films exhibited photoluminescence arising from π*–t_2g ligand‐to‐metal transition of Ru(phen)₃.     

Equisetum arvense As an abundant source of silica nanoparticles. SiO2/H3PW12O40 nanohybrid material as an efficient and environmental benign catalyst in the synthesis of 2‐amino‐4H‐chromenes under solvent‐free conditions

Uniform SiO₂ nanoparticles were successfully prepared from Equisetum arvense obtained from the north‐east of Iran. Then, surface modification of the extracted nanoparticles was performed with a methanol solution of H₃PW₁₂O₄₀ via wet impregnation method. The prepared nanocatalyst was characterized by XRD, FESEM, ICP, UV–Vis, and FT‐IR spectroscopy. The supported heterogeneous nanocatalyst was successfully applied as a Lewis/Bronsted acid catalyst in the synthesis of a series of substituted 4H–chromenes via condensation of aromatic aldehydes, malononitrile, and 4‐hydroxycoumarin under solventless conditions with fine yields in appropriately short times.     

Synthesis of (2-hydroxy-5-nitrophenyl)di[1-(2-hydroxynaphthyl)]methane and 12-[1-(2-hydroxynaphthyl)]-10-nitro-12H-benzo[α]xanthene from of 5-nitrosalicylaldehyde derivatives and β-naphthol

The reaction of the morpholinal or anil of 5-nitrosalicylaldehyde with β-naphthol yielded (2-hydroxy-5-nitrophenyl)di[1-(2-hydroxynaphthyl)]methane. Condensation of the latter compound in boiling nitromethane gave 12-[1-(2-hydroxynaphthyl)]-10-nitro-12H-benzo[α]xanthene. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1336–1339, July, 1997.