中氮茚衍生物与树状大分子PAMAM的自组装及其性能研究

研究了树状大分子PAMAM(G=1)通过其外围的氨基与中氮茚衍生物(PIN)相互作用而自组装的行为.这一自组装实现了对树状大分子的表面修饰,因而实现了其由水相向油相的转移.油相中PIN的紫外吸收增强而荧光削弱直至猝灭,且变化的程度与PAMAM(G=1)的浓度有直接关系的监测结果,证实这一转移的发生.     

树状大分子PAMAM与中氮茚衍生物CCA的自组装及其性能研究

研究了树状大分子聚酰胺-胺PAMAM(1G)外围的氨基与中氮茚衍生物CCA中的羧基的自组装行为。这一自组装实现了对树状大分子PAM-AM的表面修饰,从而也实现了CCA由油相向水相的转移。水相中PAMAM的紫外吸收与荧光都明显增强,且变化的程度与CCA的浓度有直接关系的紫外与荧光监测结果,都证实这一相转移的发生。     

树状大分子的自组装表面修饰与荧光客体分子的相转移

研究了树枝状大分子PAMAM（G=4）外围氨基与脂肪酸的自组装行为;同时研究了为PAMAM（G=4）树状大分子所包裹的荧光客体分子PHL和RB通过上述树状大分子的表面修饰实现由水相向油相的转移以及在非极性正己烷相中的紫外及荧光性能,发现当十二酸浓度为10％时,41％的PHL分子和几乎100％的RB分子可由水相转移到正己烷相,且这些被包裹在自组装体系中的染料分子的荧光未被猝灭。     

树状大分子的自组装表面修饰与荧光客体分子的相转移

研究了被PAMAM(G=4)树状大分子所包裹的荧光客体分子EB通过该树状大分子的自组装表面修饰实现由水相向油相的转移及其在非极性正己烷相中的紫外及荧光性能.发现当十二酸浓度为10%时,由水相转移到正己烷相的EB为30%;在正己烷中EB荧光较弱.与文献[3]报道的PHL、RB实验结果比较,说明上述相转移与染料自身的结构与酸碱性密切相关.它们在正己烷中的荧光强度也与其结构密切相关.     

大分子自组装及其应用的研究与进展

综述了化学吸附、分子沉积、旋涂、慢蒸发溶剂和枝接成膜等 5种大分子自组装成膜方法 ,并介绍了其在液晶、非线性光学材料、聚合物表面改性等材料领域的应用及其表征研究。     

大分子自组装体系及自组装功能膜结构的研究

本文主要介绍了３种大分子自组装体系，含硫化合物的在重金属表面的自组装功能膜、聚合物在溶液状态下的自组装体系和聚合物基材上的自组装功能膜。文中还介绍了表征自组分析方法，着重介绍了用于自组装功能膜表面、界面结构分析的两种，红外光谱法和原子力显微镜。     

中氮茚接枝的新型聚硅烷的合成及其荧光性能研究

首次报道中氮茚接枝的二甲基二苯基聚硅烷PMPSi-c的合成及其荧光性能研究.结果表明经过中氮茚接枝,聚硅烷荧光强度明显增强,且能发射强烈的蓝色荧光,有望用作蓝光区的荧光材料.     

大分子自组装功能膜的结构及界面层表征

介绍了四种常用分子方法在自组装功能膜结构及其界面层表征中的新进展，红外的光谱是常用结构分析方法，运用掠角射红外光谱及衰减全反身红外光谱可以分析自组装薄膜表面、界面结构以及分子链段的取向；ＸＰＳ分析可以确定薄膜的化学组成；电镜的运用使直接观察体系的形态，形貌成为可能；ＥＳＲ是研究滞物在溶液中自组装成胶束过各有力工具。     

改性聚酰胺-胺阳离子树状大分子的合成与表征

以甲醇为溶剂、投料比为3.0GPAMAM/N,N-二甲基乙醇胺=1∶16,N,N-二甲基乙醇胺/环氧氯丙烷=1∶1、反应温度50℃、反应时间12h的优化条件下,利用环氧氯丙烷与整代产品进行加成反应,以及环氧氯丙烷与N,N-二甲基乙醇胺进行季铵化反应,对3.0GPAMAM树状大分子进行阳离子改性。并采用红外光谱(FT-IR)、核磁共振(NMR)对产品进行了结构表征。结果表明:所合成的产品与预期产物结构吻合较好,达到预期目标,且阳离子转化率达到90%以上。     

不同pH下3-吡啶取代类中氮茚化合物的荧光行为

合成了3个具不同取代基的3-吡啶取代类中氮茚化合物a、b和c,研究了它们在不同pH值缓冲溶液中荧光性能的变化。发现,3个化合物能发射强烈的蓝色荧光,且随着溶液pH值的增大,其荧光强度均有所增强,荧光发射波长也均有所红移,但增强、红移程度很不一样。其中,c、a的荧光强度可分别增强200、150倍;而b、a的荧光发射波长可分别红移49、30nm。     

树枝状大分子PAMAM-DSCL的合成及其性能研究

合成了外围由小分子修饰的树枝状大分子PAMAM(1G)-DSCL,通过紫外、质谱等表征了其结构,并对其性能进行了研究。     

树枝状大分子PAMAM-DSCL的合成及其荧光性能研究

合成了外围由小分子修饰的树枝状大分子PAMAM（1G）-DSCL,通过紫外、质谱等表征了其结构,并对其吸附染料分子EB、MB前后的荧光性能进行了研究,发现这种吸附还与染料分子的体积有关.     

Improving photovoltaic properties by incorporating solution-processable functionalized graphene into poly(3-octylthiophene)/phenyl c61 butyric acid methyl ester photovoltaic devices

We report the optoelectronic properties occurring in solution-processable functionalized graphene (SPFGraphene)-PCBM/poly(3-octylthiophene) (P3OT) composites. The structural configuration of the devices is ITO/PEDOT:PSS/P3OT:PCBM-SPFGraphene/LiF/Al. The best results were obtained with a P3OT/PCBM (1:1) mixture with 8 wt% of SPFGraphene in an open-circuit voltage (V(OC)) of 0.65 V, a short-circuit current density (J(SC)) of 4.2 mA/cm2, and a fill factor (FF) of 0.35, which led to a power conversion efficiency of 0.95% at illumination at 100 mW/cm2 AM 1.5. In the P3OT:PCBM-SPFGraphene composite, the SPFGraphene acted as exciton dissociation sites and provided the transport pathway of the lowest unoccupied molecular orbital (LUMO)-graphene-Al. Doping SPF-Graphene into P3OT resulted in appropriate energetic distance between the highest occupied molecular orbital (HOMO) and LUMO of the donor/acceptor for a high open circuit voltage and provided higher exciton dissociation volume mobility of carrier transport for a large short-circuit current density.     

Study on the combined dust suppression effect of sodium alginate and sodium fatty acid methyl ester sulfonate

To further improve the effect of dust control in coal mines and protect the health of workers, the effect of sodium alginate (SA) on the dust suppression ability of sodium methyl ester sulfonate (MES) was studied using molecular dynamics simulation. Scanning electron microscopy and X-ray photoelectron spectroscopy analyses were performed to compare the dust suppression effect of the SA/MES dust suppressant compound to MES by itself. The results show that when SA is present, the coal dust bonds together more, agglomerates into large particles, and settles. This finding is also consistent with the results of molecular dynamics simulations. In the analysis of relative concentrations and mean square displacement, the presence of SA can reduce the water diffusion on the coal surface, making it easier for coal dust to agglomerate. In addition, we analyzed the mode of action of SA through radial distribution and electrostatic potential, and determined that SA forms a unique networking chain structure to capture and retain water molecules. SA increases the probability of interaction between water and surfactant, thus increasing the amount of adsorption. This study provides a more in-depth understanding of the dust suppression mechanism of mixed dust suppressants.     

Preparation of poly(3-hexylthiophene)/[6,6]-phenyl-C61-butyric acid methyl ester Langmuir-Blodgett bulk hetero junctions on indium tin oxide

Mono-layers of aggregated Poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) molecules were obtained by using solutions of P3HT, PCBM and P3HT-PCBM mixture without stabilizers such as stearates in chloroform at an air-water interface. 1 to 10 cycle-lifted LB films of P3HT and PCBM were successfully transferred to cleaned bare indium-tin-oxide coated glass substrate by vertical lifting method excluding the first 1 to 2 cycle layer. The dependence of P3HT and PCBM film thickness on the transfer cycles has been explained by the molecular sizes, where four edge-on P3HT molecular and six PCBM molecular stacking which result in thickness was taken into account. Work functions of deposited LB-layers were consistent with those of the ordinary casted films. P3HT and PCBM LB-layers showed optical activity in both infra-red (IR) and visible absorption regions of the spectrum. P-polarized IR absorption owing to C=C and C=O stretching vibrations observed in LB-layered films clearly indicate the enhancement of the orientation of these bonds perpendicular to the substrate surface in contrast to the spin-coated one. Visible optical absorption intensity was increased well in proportion with the lift cycle-numbers of both P3HT and PCBM LB films. The photovoltaic characteristics have been observed in the devices fabricated with P3HT (5 cycles-layer)/PCBM (5 cycles-layer) LB hetero structure as an active layer of the solar cells. The surface pressure of LB compression for the mixture of P3HT and PCBM, that is, bulk hetero mixtures, has also been well built up to 30 mN/m.