以三聚茚为核的星型电子受体材料的合成、 表征与光伏性能

以高度平面共轭的烷基取代三聚茚为中心核, 以噻吩基团桥联, 在末端连接氰基茚酮作为拉电子基团, 设计合成了一类星型受体分子2,2',2″-{[(5,5,10,10,15,15-己基-10,15-二氢-5H-二茚[1,2-a：1',2'-c]芴-2,7,12-三基)三(噻吩-5,2-二基)]三(亚甲基)}三(3-氧杂-2,3-二氢-1H-茚-2,1-二叉)三丙二腈(NFT-C6)和2,2',2″-{[(5,5,10,10,15,15-癸基-10,15-二氢-5H-二茚[1,2-a：1',2'-c]芴-2,7,12-三基)三(噻吩-5,2-二基)]三(亚甲基)}三(3-氧杂-2,3-二氢-1H-茚-2,1-二叉)三丙二腈(NFT-C10). NFT-C6和NFT-C10的最高占据轨道(HOMO)和最低未占轨道(LUMO)分别位于-5.66和-3.75 eV. 其薄膜在400~700 nm范围内具有较大的吸收强度, 最大吸收峰分别位于606和586 nm. 以聚[(2,6-{4,8-二[5-(2-乙基己基)噻吩-2-基]-苯并[1,2-b：4,5-b']二噻吩})-{5,5-(1',3'-二-2-噻吩基-5',7'-二(2-乙基己基)苯并[1',2'-c：4',5'-c']二噻吩-4,8-二酮)}](PBDB-T)为给体材料, 以NFT-C6或NFT-C10为受体材料制备了太阳能电池器件, 器件在300~700 nm之间具有较宽的响应光谱, 其光电转换效率(PCE)分别达到1.09%和5.23%. 原子力显微镜(AFM)结果表明, PBDB-T和NFT-C10共混制备的光伏器件活性层具有合适的相分离尺寸, 有利于激子的有效解离, 而PBDB-T: NFT-C6器件的活性层相分离尺寸过大, 增加了激子复合的几率, 使器件的短路电流、 填充因子和PCE降低. 研究结果表明, 基于三聚茚的星型光伏材料具有一定的应用前景.     

Mg-Fe-Ni非晶储氢电极材料的微结构和电化学性能

采用XRD、SEM、电化学测试等方法研究了机械球磨合成的Mg-Fe-Ni非晶储氢电极材料的微结构和电化学储氢性能. 结果表明, 镁含量和镍粉添加量对复合物的电化学性能有显著影响. 对于(xMg+Fe)+200% (质量分数, 余同)Ni (x=2、3) 复合物, 随Mg含量增加, 最大放电容量增大. 当x=2、3时复合物的最大放电容量分别为391.9、480.8 mA•h•g^-1. 无镍的(3Mg+Fe)复合物最大放电容量仅为23.8 mA•h•g^-1；对于(3Mg+Fe)+y% Ni (y=0、50、100、200), 随着镍添加量的增加, 球磨120 h合成复合物的最大放电容量先增加后减小,并在y=100时达到最高值519.5 mA•h•g^-1. 微结构分析表明,无镍的Mg-Fe复合物经120 h球磨后仍为Mg和Fe两个单相混合组织, 无新相产生, 而加入镍粉有助于Mg-Fe非晶相的形成, Ni还起到良好的表面电催化作用, 改善了非晶Mg-Fe-Ni复合物的电化学性能.     

Dispersion of ZnO Nanocrytals in Co-solvent and Its Application in Photovoltaic Material

To overcome the aggregation of nanocrystals in a blend of inorganic material with conjugated polymers to prepare photovoltaic material, we used a co-solvent blend of CHCl3 with MeOH at a certain volume fraction to disperse inorganic nanocrystals. The results show that when the volume fraction of MeOH is 50%, ZnO nanocrystals with an average diameter of 30 nm disperse well in the co-solvent solution. Its application in photovoltaic material was investigated in this work, and the photoluminescence(PL) spectra show that when ZnO was 50%(volume fraction) in solution and 25%(volume fraction) in film, the fluorescence quenching reached the maximum values 83.34% and 64.4%, respectively, indicating that electron could transfer from conjugated polymer to electron-acceptor ZnO effectively.     

Synthesis and Characterization of a New Titanium-silicate Material Containing Cage-like Polyhedral Oligosilsesquioxane

A new titanium-silicate material was synthesized with cubic cage-like tetramethylammonium octasilicate and TiCl4 ethanol solution as precursors.The product was characterized by FTIR,29Si NMR,UV-Vis,and XRD.Structural and ingrediental analyses suggest that this material has a layered structure with cubic cage-like polyhedral oligosilsesquioxane as building blocks and titanium as bridging atoms.     

Synthesis and Characterization of a New Titanium-silicate Material Containing Cage-like Polyhedral Oligosilsesqnioxane

A new titanium-silicate material was synthesized with cubic cage-like tetramethylammonium octasilicate and TiCl4 ethanol solution as precursors. The product was characterized by FTIR, ^29Si NMR, UV-Vis, and XRD. Struc-tural and ingrediental analyses suggest that this material has a layered structure with cubic cage-like polyhedral oligo-silsesquioxane as building blocks and titanium as bridging atoms.[第一段]     

一种基于咔唑的新型磷光主体材料的合成及光电性能

设计并合成了一种基于咔唑的新型的磷光主体材料, 即9-(6-(9-咔唑基)己基)咔唑(hCP), 对其结构及性能进行了表征. 研究结果表明: hCP分子中两个咔唑与烷基链是非共平面的, 由于长烷基链的缠绕, 因而具有较高的三线态能级(3.01 eV)和较高的玻璃化温度(93℃); 以hCP为主体材料, 与绿光磷光染料三(2-苯基吡啶)合铱(Ir(ppy)₃)掺杂作为发光层, 制备了磷光电致发光器件, 其器件的最大电流效率为15.1 cd·A^-1, 相对于4,4'-N,N'-二咔唑基联苯(CBP)为主体材料的参考器件, 显著提高了34.8%.     

含辣素衍生结构疏水缔合聚合物PAAH的合成、表征及溶液性质

以辣素功能结构单体N-（4-羟基-3-甲氧基-苄基）-丙烯酰胺（HMBA）为疏水单体,与丙烯酰胺（AM）和2-丙烯酰胺基-2-甲基丙磺酸钠（NaAMPS）通过自由基胶束共聚,制得三元疏水缔合聚合物P（AM-NaAMPS-HMBA）（简称PAAH）. 采用紫外-可见光谱、核磁共振氢谱、热重分析及扫描电子显微镜对共聚物的结构及形貌进行表征,利用原子力显微镜对聚合物水溶液的微观形貌进行观察,并对其溶解性、疏水缔合性、耐温性及抑菌性能进行了研究. 结果表明,所得共聚物中疏水单体含量与投料比基本一致;PAAH具有良好的速溶性,当聚合物浓度超过一定值后,溶液黏度急剧增加,且随着疏水单体含量增加,疏水缔合性能增强;原子力显微镜观察证实了聚合物水溶液中网络结构的存在. 与未改性的P（AM-NaAMPS）（简称PAA）共聚物相比,引入具有生物活性且带有刚性苯环结构的HMBA单体可使PAAH共聚物热稳定性增强,耐温性能提高,并赋予其优良的抑菌性能.     

Composite Worm‐Like Aggregates Formed from a Pair of Block‐Copolymers Containing Hydrogen‐Bonding Donor and Acceptor

Worm‐like aggregates with a PAA/P4VP complex core and a PEG/PNIPAM mixed shell were prepared in ethanol by the comicellization of poly(ethylene glycol)‐block‐poly(acrylic acid) (PEG‐b‐PAA) and poly(N‐isopropylacrylamide)‐block‐poly(4‐vinylpyridine) (PNIPAM‐b‐P4VP) through hydrogen‐bonding. The formed aggregates were studied by dynamic light scattering, static light scattering, ¹H NMR, and transmission electron microscopy. The length of worm‐like aggregates could be adjusted by changing the weight ratio of W(PNIPAM‐b‐P4VP)/W(PEG‐b‐PAA). When the ratio changed from 20 to 150%, the length changed from about 100 nm to several microns, and the diameter stayed almost unchanged at about 15 nm.

     

一种新颖丙烯腈基含糖共聚物的合成和表征

利用无保护的糖内酯与甲基丙烯酸-2-氨乙基酯盐酸盐反应高效简便合成了一种新颖的直链糖,并用水相沉淀聚合的方法将其与丙烯腈进行了共聚合。考察了单体配比、聚合时间、引发剂浓度和总单体浓度对聚合行为的影响,红外、核磁用来表征聚合物,证明水相沉淀聚合是一种有效的聚合方式。     

Complementary Hydrogen Bonding Modulates Electronic Properties and Controls Self‐Assembly of Donor/Acceptor Semiconductors

A comprehensive investigation of the complementary H‐bonding‐mediated self‐assembly between dipyrrolo[2,3‐b:3′,2′‐e]pyridine (P2P) electron donors and naphthalenediimide/perylenediimide (NDI/PDI) acceptors is reported. The synthesis of parent P2P and several aryl‐substituted derivatives is described, along with their optical, redox, and single‐crystal packing characteristics. The dual functionality of heteroatoms in the P2P/NDI(PDI) assembly, which act as proton donors/acceptors and also contribute to π‐conjugation, leads to H‐bonding‐induced perturbation of electronic levels. Concentration‐dependent NMR and UV/Vis spectroscopic studies revealed a cooperative effect of H‐bonding and π–π stacking interactions. This H‐bonding‐mediated co‐assembly of donor (D) and acceptor (A) components leads to a new charge‐transfer (CT) absorption that can be controlled throughout the visible range. The electronic interactions between D and A were further investigated by time‐dependent DFT, which provided insights into the nature of the CT transition. Electropolymerization of difuryl‐P2P afforded the first conjugated polymer incorporating H‐bonding recognition units in its main chain.     

锡基非晶态材料的化学合成及其嵌锂性能的初步研究

锂离子电池是近年来化学电源领域研究与发展的热点．为了进一步提高电池的能量密度，开发高容量嵌锂材料是锂离子电池技术发展的关健．目前，广泛应用的嵌锂负极多采用石墨结构碳素材料，其充放电容量已接近ＬｉＣ６的理论比容量３７２ｍＡ·ｈ／ｇ．与此同时，采用其它类...     

The Synthesis and Properties of New Metal-free and Metallophthalocyanines Containing Four Diloop Macrocyclic Moieties

The synthesis and characterization of new metal-free (9) and metal-containing (Zn, Ni or Cu 10, 11, 12) derivatives of a symmetrically octasubstituted phthalocyanine derived from 21,22-dicyano-2,3,5,6,8,9,11,12,15,17,18,25,26,28-tetradecahydro[1,4,7,12] benzodioxadithiacyclotetradeceno[6,7-b][1,4,7,10,13]benzopentaoxacyclopentadecene (7), which was synthesized in a multi-step reaction sequence, have been described. The novel compouds have been characterized by a combination of elemental analysis, ¹H and ¹³C NMR, IR, UV–vis and MS spectral data.     

锂离子电池负极材料非晶态MgSnO3的合成和性能研究

锂离子电池金属氧化物负极材料越来越受到人们的重视.锡基氧化物贮锂材料具有能量密度较高、清洁无污染、原料来源广泛、价格便宜等优点,是金属氧化物类负极材料中极具发展潜力的一种负极材料.因此,近年来人们对这类材料开展了广泛的研究[1～6].     

La-Ni-Mo-B非晶态催化剂的制备及其苯酚加氢脱氧催化性能

以NaBH4为还原剂采用化学还原法制备出La-Ni-Mo-B非晶态催化剂,用扫描电子显微镜(SEM)、X射线衍射(XRD)、电感耦合等离子发射光谱(ICP-AES)、X射线光电子能谱(XPS)等手段对催化剂进行表征,研究了助剂La对Ni-Mo-B催化剂催化性能的影响.结果显示,加入适量助剂La能显著减小催化剂粒径,增加Ni0含量,促进Mo6+还原生成Mo4+,但过量La会覆盖Ni0和Mo4+的活性位点.催化剂的高加氢活性主要归因于其非晶态结构和高Ni0含量,高脱氧活性主要归因于其高Mo4+含量.在苯酚的加氢脱氧(HDO)反应中,La-Ni-Mo-B非晶态催化剂催化苯酚HDO反应主要按照加氢-氢解的路径进行的,显著降低了产物中芳烃含量.通过优化反应条件,催化苯酚的转化率和脱氧率都可达到99.0%.高温下La-Ni-Mo-B非晶态催化剂失活的主要原因是非晶态结构的破坏.     

Synthesis and Pharmacological Characterization of New H2‐Antagonists Containing NO‐Donor Moieties,Endowed with Mixed Antisecretory and Gastroprotective Activities

Synthesis, structural characterization, and pharmacological profile of a series of H₂‐antagonists able to release nitric oxide (NO) are reported. These compounds were obtained by using appropriate spacers to join H₂‐antagonistic pharmacophoric groups related to lamtidine and tiotidine to different NO‐donor moieties such as esters of HNO₃, nitrosothio groups, and benzenesulfonyl‐substituted furoxans. All of the compounds were tested for their NO‐donor properties. Furthermore, the hybrid structures synthesized, together with some selected reference compounds, were tested for their H₂‐antagonistic properties, both in vitro and in vivo, and for their gastroprotective effects. Only the hybrid compounds were able both to antagonize histamine effects on guinea‐pig papillary muscle and to display in vivo antisecretory and gastroprotective action. The best results were obtained with the lamtidine/furoxan hybrid structure.     

Synthesis of a New Family of Green Light Emitting Material Containing Both Hole and Electron Transporting Units

Since Tang and Van Slyke reported the first double-layer organic electroluminescent (EL) device using Alq3 (q = 8-hydroxyquinolinyl) in 19871, organic EL devices have received a great deal of attention in view of their application as full-color flat-panel displays as well as academic interest2,3,4. There have been extensive studies of organic EL devices directed toward achieving high brightness and multi- or full-color emission, and in particular, improving the durability and thermal stabi…     

Surface Characterization,Biocompatibility and Antifungal Efficacy of a Denture-Lining Material Containing Cnidium officinale Extracts

Herein, we investigated the surface characterization and biocompatibility of a denture-lining material containing Cnidium officinale extracts and its antifungal efficacy against Candida albicans. To achieve this, a denture-lining material containing various concentrations of C. officinale extract and a control group without C. officinale extract were prepared. The surface characterization and biocompatibility of the samples were investigated. In addition, the antifungal efficacy of the samples on C. albicans was investigated using spectrophotometric growth and a LIVE/DEAD assay. The results revealed that there was no significant difference between the biocompatibility of the experimental and control groups (p > 0.05). However, there was a significant difference between the antifungal efficiency of the denture material on C. albicans and that of the control group (p < 0.05), which was confirmed by the LIVE/DEAD assay. These results indicate the promising potential of the C. officinale extract-containing denture-lining material as an antifungal dental material.     

偶氮吡啶分子结的制备、表征及电学性质初步研究

具有特异电学性质的分子结的制备及电子输运特性研究是分子电子学领域中的主要内容,对构筑分子电子器件具有重要意义．但是,由于分子结的尺度通常在100nm以下,这使得分子结的低缺陷制备和准确有效的电学特性研究面临困难．目前,自组装方法已经成为降低分子结缺陷的主要手段,     

Synthesis and Characterization of a Thiophene Copolymer for Photovoltaic Application

A soluble thiophene copolymer having polar and non polar side groups was synthesized and its photovoltaics performance was investigated. The synthesized copolymer was characterized using Nuclear Magnetic Resonance (NMR) and optical spectroscopy. Dye sensitized solar cells were fabricated using this copolymer as sensitizer. An open-circuit voltage of 0.50V, a short-circuit current density of 1.195 mA/cm² and an overall power conversion efficiency of 0.3% were measured.