单臂冠醚液晶LB膜的相变研究

研究了两种单臂冠醚液晶及配合物(1, 2及1.Eu^3^+)的LB膜的成膜特性,实验发出它们均可在气-液界面形成单分子膜, 但不易转移, 化合物1在压膜过程中出现一维相变。用CPK模型对成膜分子构型和面积进行估算, 其结果与实验相一致, 并讨论了冠醚液晶结构对LB膜相变的影响。     

DOPANT EFFECTS OF SQUARYLIUM CYANINE DYES ON FUNCTIONAL DEVICES

本文初步研究了方酸菁染料在功能器件中的应用,并探讨了相关机理。我们用方酸菁掺杂8羟基喹啉铝发光层,获得了红光有机电致发光器件;用掺杂方酸菁的联吡啶钌作光敏剂修饰TiO₂纳晶薄膜电极,有效地弥补了联吡啶钌在600nm以上红光区采光能力的不足,从而大大提高了光电化学太阳电池的总体光电转换效率。     

N-十二烷基丙烯酰胺与4'-丙烯酰胺基苯并-15-冠-5共聚物的合成

报道了N-十二烷基丙烯酰胺与4'-丙烯酰胺基苯并-15-冠-5共聚物的合成.探讨了中间体、单体和共聚物合成中的影响因素.开展了对这种共聚物LB膜的制作研究,获得了Y型LB膜,考察了亚相中添加各种碱金属离子后π-A曲线的特点.     

6-溴-1,3-苯并二口恶茂-4-甲醛的合成

我们报道的 6 -溴 - 1 ,3-苯并二口恶茂 - 4 -甲醛 (简称溴代邻位胡椒醛 ) ,是一种用于生产治疗和预防高血脂、高血压药物的重要中间体[1 ,2 ] .溴代邻位胡椒醛的合成 Дaykщ ac B K等人 1 979年曾作过报道[3] ,他们是通过邻位胡椒醛溴代来进行合成的 ,此法不仅原料难得 ,而且产品不易纯化 .我们设计从廉价易得的工业品邻位香兰素出发 ,经三步合成了标题化合物 ,操作简便 ,产品易于纯化 ,合成路线如下 :1　实验部分1 .1　仪器Perkin- Elmer- 5 991 3型红外光谱仪 ( KBr压片 ) ;JEOL- FX90型核磁共振仪 ( CDCl3作溶剂 ,TMS为内标 ) …     

Intermolecular interaction between squarylium cyanine and porphyrin

In this paper, the interaction between squarylium cyanine and porphyrin in chloroform is investigated by absorption and fluorescence spectroscopy. Emphasis has been put on the mechanism of intermolecular energy transfer. The overlap integral J between the absorption spectrum of squarylium cyanine and the fluorescence spectrum of porphyrin was calculated, which reveals that the singlet-singlet energy transfer may occur from porphyrin to squarylium cyanine in solution. In comparison of the observed rate constant [kqII=6.1 ×1013 (mol/L)-1·s-1] for fluorescence quenching of porphyrin by squarylium cyanine with the diffusion rate constant in chloroform [kdif=1.1×1010 (mol/L)-1·s-1] and the rate of energy transfer [ket≤6.7×104 (mol/L)-1·s-1 in the experimentally dilute solutions] estimated from Forster formula, the possibility of energy transfer by electron exchange or/and coulombic mechanism could be excluded. So it has been definitely convinced that the intermolecuiar energy transfer between them is     

Photoinduced energy transfer and charge transfer on squarylium cyanine dyes

A series of squarylium cyanine dyes (Sqs) were synthesized to explore their applications in functional devices.Preliminary investigation on the mechanism involved in these devices was carried out.Spectroscopic behavior of Sqs with porphyrin (P),8-hydroxyquinolium aluminum (Alq) and ruthenium bipyridyl complex (Ru(bipy)) in solution,in film and on nanocrystalline TiO2 was investigated,respectively.A mechanism including photoinduced energy transfer and charge transfer processes was suggested in the corresponding practical devices.By means of doping,a red organic electroluminescent device (ELD) using Sq-doped Alq as the emission layer (EML) has been developed,and the total light to electricity efficiency of nanocrystalline TiO2 electrode based on using Sq-doped Ru(bipy) as photosensitizer has been improved greatly in the whole visible region,particularly in the red area above 600 nm.     

6-溴-1，3-苯并二恶茂-4-甲醛的合成

The 6-bromo- 1, 3- benzodiozole- 4- carbonaldehyde was synthesized by using 2- hydroxy-3-methoxy benzaldehyde as an original reactant, through three steps of bromination, demethylation and methylenation. The title compound was identified by elemental analysis. IR, 1HNMR and MS. The melting point was 113-114℃ determined with macroscope melting instrument and was 113.8C determined with DSC.     

双臂胆甾醇酯型氮杂冠醚化合物的LB膜研究

研究了含有双臂胆甾基的氮杂冠醚化合物的单分子膜成膜特性,测试了其LB膜的吸收光谱和小角X-射线衍射谱。结果表明,这种化合物成膜性能和转移性能比单臂的胆甾基氮杂冠醚化合物好。结合CPK原子模型,推测了该分子在膜中的取向和构型。     

胆甾液晶二氮杂冠醚-Eu(Ⅲ)配合物LB膜和荧光性质研究

研究了胆甾液晶二氮杂冠醚N,N'-双[胆甾-5-烯-3β-氧羰甲基]-1,10-二氮-4,7,13,16-四氧环十八烷(1)及其与Eu³⁺的配合物(2)、2与苯甲酸的混配物(3)的LB膜和荧光性质.结果表明:1、2和3都在水溶液亚相液面形成稳定的单分子膜,但只有1的单分子面积受亚相pH的影响.1、2和3的单分子膜都容易转移到石英基片上形成LB膜,其中2和3为X型,转移比分别为0.6和1.0.在LB膜中,在2的荧光激发波长范围比在溶液中的宽,荧光强度也比在溶液中的强得多.在2中添加苯甲酸形成3可改善LB膜中分子有序排列,荧光强度增强到无苯甲酸时的2.0倍.所有这些LB膜,即使添加了苯甲酸的,都不是很稳定.     

基于Android 平台的智慧市政系统

为提高市政设施巡检过程中信息上报的准确性和实时性，提出了基于Android 平台的市政系统。通过对Android 设备的摄像头调用和GPS( Global Positioning System) 、Network 定位模块的加载，采集了图像和定位信息，并结合其他工程信息将数据打包上传至后台服务器中，保存到数据库。另外通过浏览器访问Web 网页实现后台数据信息的管理、任务派发等。测试结果显示，该系统能有效获取图像和定位信息，快速准确地上传数据和简化后台工作流程，具有一定的实用价值。