共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
3.
4.
一种新型电荷传输材料的合成研究 总被引:5,自引:0,他引:5
通过三种方法合成了一种新型电荷传输材料1,1-双(对-二乙胺基苯基)-4,4-二苯基-1,3-丁二烯,其中格氏反应的合成方法具有总产率高、制备简便的优点,并对最终产物的纯化方法进行了探讨。 相似文献
5.
6.
以对碘苯酚和溴代正十二烷为原料,合成了一种三芳胺-均苯三甲酰胺基衍生物N,N?,N?-三{3-[(4-{双[4-(十二烷氧基)苯基]氨基}苯基)氨基]丙基}-1,3,5-苯三甲酰胺(H1),以超分子组装的方法实现了三芳胺功能单元的长程有序排列。紫外-可见吸收光谱及荧光光谱研究表明,H1在弱极性溶剂正庚烷中有较明显的自组装特性;分别用光学显微镜和SEM观察了H1的自组装形貌;通过量子化学计算和电化学性质测试考察了H1的空穴传输性能,计算结果和实验测得的HOMO能级(?5.14 eV)、LUMO能级(?1.80 eV)均与钙钛矿的HOMO能级(?5.43 eV)和LUMO能级(?3.93 eV)匹配,同时测得H1的热分解温度为445℃。研究表明,H1可以作为空穴传输材料在有机电化学与工业中应用于钙钛矿太阳能电池。 相似文献
7.
8.
9.
三种新型溴代芳胺类阻燃剂的合成研究 总被引:1,自引:0,他引:1
合成了三种溴代芳胺类阻燃剂∶十溴二苯胺、双(2,3,5,6 四溴 4 氨基苯基)甲烷、双(3,5 二溴 4 氨基苯基)甲烷,并对产品的后处理进行了探讨。实验还发现非溶剂法不适合于多溴代芳胺类化合物的合成。 相似文献
10.
11.
12.
Yunyang Liu Hongding Tang Jingui Qin Makoto Inokuchi Minoru Kinoshita 《Journal of Inorganic and Organometallic Polymers and Materials》2007,17(1):111-119
Two polyferrocenylsilanes (PFSs) 1 and 2 with aniline and carbazolyl as side chains have been prepared by treating silyl-chloride functionalized PFS (PFS-Cl) with hydroxyl-ended aniline and carbazole compounds, respectively, and characterized by NMR, FT-IR, elemental analysis (EA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and cyclic voltammetry (CV). Both of them could be oxidized by iodine and 2,3-dichloro-5,6-dicyanoquinone (DDQ) to form complexes. PFS 1 could be oxidized by tetracyanoethylene (TCNE) too. The complexes are characterized by FT-IR, EA, Iron-57 Mössbauer spectroscopy. All of them are partially oxidized by the oxidants and both FeII and FeIII coexist in the complexes. Magnetic property measurement by superconducting quantum interference device (SQUID) shows their paramagnetic properties with somewhat antiferromagnetic interaction. Results show that the joint type between PFS backbone and the electron-rich side groups has less direct effect on the exhibition of ferromagnetic interaction in their complexes. 相似文献
13.
在水溶液中合成了 Keggin结构混合多阴离子 H5PMo10 V2 O40 的 8-羟基喹啉电荷转移配合物 ( C9H7NO) 5H5PMo10 V2 O40 · 9H2 O。经元素分析和热重分析 ,确定了其元素构成和配合物的分子组成。对其进行了 IR、UV、DRUV- Vis、XPS和 ESR表征。结果表明 ,在受体多酸和给体 8-羟基喹啉之间存在较强的相互作用并发生了电子转移 ,荷移配合物中 ,V5+ 为电子受体并被部分还原为V4+ ,杂多阴离子仍然保持 Keggin结构 ,但由于电子转移的影响 ,四个特征峰较母体杂多阴离子均有不同程度的位移 相似文献
14.
Doping semiconductor nanocrystals with transition metal ions introduces new optical, electronic, and magnetic properties to the host semiconductor nanocrystals. The energy transfer and charge transfer between exciton and dopant ions are the key photophysical processes responsible for the unique properties of doped semiconductor nanocrystals, which are distinct from their undoped counterparts. Since the energy transfer and charge transfer processes between exciton and dopant ions compete with the usual relaxation pathways of the exciton, competition among different dynamic processes ultimately determines the photophysical properties of doped nanocrystals. In this review, we discuss the dependence of the dynamics of the energy transfer and charge transfer processes in Mn-doped II-VI semiconductor nanocrystals on the structure of the host nanocrystal, spatial distribution of the dopant ions within the nanocrystal, and charge carrier-trapping molecules near the surface of the nanocrystals. 相似文献
15.
Qian ZHAO Shirong WANG Xianggao LI LiIi HE 《Frontiers of Chemical Engineering in China》2008,2(3):330-334
Six bisazo compounds were synthesized by coupling 2-(4′-aminophenyl)-6-aminobenzoxazole as diazo component with N-phenyl-N′-(2-hydroxy-3-naphthoyl)urea derivatives, and characterized by ultra-violet and visible spectroscopy (UV-Vis), Fourier transform
infrared spectroscopy (FT-IR) and elemental analysis (EA). Using these bisazo compounds as charge generation materials and
CT-191(2-methyl-4-(N,N-dibenzyl) aminobenzoaldehyde-1,1-diphenylhydrazone) as charge transportation material, organic photoconductive devices were
prepared. The result from photoconductivity measurement of the devices shows that the bisazo compound from N-(2-methylphenyl)-N′-(2-hydroxy-3-naphthoyl)urea has the best xerographic performance, V
0=600 V, V
R=30 V, R
d=15 V·s−1, E
1/2=3.5 lx·s.
__________
Translated from Journal of Tianjin University, 2007, 40(11): 1295–1299 [译自: 天津大学学报] 相似文献
16.
17.
荧光传感器提供了方便,快捷,廉价的分析检测重金属离子的方法,并且有很高的灵敏度和选择性.它在环境科学,分析化学以及生命科学等领域有着广泛的应用前景.综述了分子内电荷转移(intramolecular charge transfer)荧光传感器的最新研究进展,并展望了该领域的发展趋势. 相似文献
18.
用亚甲基蓝电荷转移光度法测定红霉素,以二次石英蒸馏水为溶剂,红霉素与亚甲基蓝在常温下进行电荷转移反应生成1:1稳定的配合物,用可见及紫外分光光度计于最大波长678 am测定其吸光度.实验表明:此法灵敏度高(ε=1.59×104 L/(mol·cm)),精密度较好(对25 mL 5.0×10-3 mg/mL红霉素9次,RSD=3.0%).红霉素的浓度在0.0008~0.0250 mg/mL范围内服从Beer定律,方法的检出限为0.11μg/mL.该方法可靠,重现性好,可用于红霉素肠溶片和兽用红霉素含量的测定. 相似文献
19.
Frederick D. Lewis 《Israel journal of chemistry》2013,53(6-7):350-365
The π-stacked bases of B-DNA constitute a helical ruler present nowhere else in nature. When two chromophores are placed at the ends of a base-pair domain with fixed orientations of their transition dipole moments, insertion of an additional base pair between the chromophores increases the distance between the chromophores by ca. 3.4 Å and the angle between their transition dipoles by ca. 36°. The consequences of these changes on the dynamics and efficiency of photoinduced charge transport and upon exciton-coupled circular dichroism and fluorescence resonance energy transfer are discussed. 相似文献
20.
胺类硅胶材料由于具有强吸附性能已经成为人们研究的热门课题,已应用于污水处理、生物医药等很多领域.胺类硅胶材料合成方法主要有包覆法、硅烷偶联剂法、溶胶-凝胶法和化学改性法.本文简单介绍了硅烷偶联剂法和溶胶-凝胶法合成胺类硅胶材料及其在生活中的应用. 相似文献