恶二唑

Eleven novel 2-alkylthio-5-(5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine-5-yl)-1,3,4-oxadiazole derivatives (5) and six novel 2-alkylthio-5-(5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine-5-yl)-1,3,4-thia- diazole derivatives (8) have been designed and synthesized by using 5-amino-3-ethoxycarbonyl-1H-1,2,4-triazole as a starting material.

以5-氨基－1H-1，2，4-三唑－3-羧酸乙酯为起始原料，设计合成了11个新型的2-取代硫醚－5-（5，7-二甲基－1，2，4-三唑并[1，5-a]嘧啶基）-1，3，4-恶二唑类化合物(5)和6个新型的2-取代硫醚－5-（5，7-二甲基－1，2，4-三唑并[1，5-a]嘧啶基）-1，3，4-噻二唑类化合物(8)。

The measurement results of the energy levels indicate that the electron affinity of the compound is higher than that of PBD which is the normal electron-transporting material.

测量结果表明，该化合物具有较高的电子亲和势，明显高于常用的电子传输材料2-（4-联苯基）－5-（对叔丁基苯基－1，3，4-恶二唑。

A team in the United States has found the chemical compounds can tangier and inneeded for the survive of Schistosoma.

美国一个团队发现了恶二唑这个众所周知的化学物质能够指向血吸虫病赖以存活的酶。

The molecule has a typical D-π-A structure with terminal units of electron donor and accepter groups. The triphenylamine group, as the electron donor, is connected to the oxadiazole group which is the electron accepter through the cinnamene group.

该分子具有典型的D-π-A型推拉电子结构，三苯胺基团作为给电子基通过苯乙烯共轭链桥接到吸电子基1，3，4-恶二唑基团。

This thiosemicarbazide was treated under the catalysis of glacier acetic acid,mercuric acetate giving 2 benzyl 5 phenylamino 1,3,4 thiodiazole and 2 benzyl 5 phenylamino 1,3,4 oxadiazole respectively.

然后分别将其在冰醋酸、醋酸汞存在下关环，制得 2 苯甲基 5 苯胺基 1，3 ，4 噻二唑与 2 苯甲基 5 苯胺基 1，3 ，4 口恶二唑

A novel kind of oligomer PPV derivative containing oxadiazole in the main chain was synthesized according Heck reaction, efficiency of single layer OPPV device was about five time higher comparing with single layer PPV device, which was attributed to the improved, balance of carrier injection and transportation.

三、利用Heck反应合成了PPV主链上含有恶二唑基团的可溶性低聚物OPPV，OPPV的单层器件的效率较单层PPV器件的效率提高5-10倍，证明了单层器件亮度和效率的提高是载流子平衡注入和传输的结果。

Absorption spectra indicate that there is little or no interaction between chromphores in the ground state. However, the fluorescence emission of oxadiazole and triphenylamine moieties are almost quenched, which shows that in the excited ground state there exists very effective intermolecular singlet-singlet energy transfer.

研究发现，这些多发色团化合物在基态发色团之间没有作用或作用很小，而其中恶二唑和三苯基胺单元的荧光被严重的猝灭，这说明在激发态下，萘酰亚胺发色团与恶二唑、三苯胺功能团之间发生了分子内单线态－单线态能量转移。

The molecular structures of these derivatives were characterized by IR and 1HNMR respectively. The UV absorption and photoluminescent properties were also studied.

探讨了反应条件对合成恶二唑衍生物的影响，研究了恶二唑衍生物的紫外光谱和荧光光谱性能。

Two novel aromatic diamines consisting of triphenylamine and 1,3,4-oxadiazole groups were successfully synthesized.

本研究成功合成二种含有三苯胺及1，3，4-恶二唑结构的新型芳香族二胺单体。

First, N'-(4-aminophenyl)-N'-4-(5-phenyl-1,3,4-oxadiazol-2-ylphenylbenzene-1,4-diamine was prepared and polymerization was carried out by direct polycondensation with a series of dianhydrides to obtain polyimides containig triphenylamine units in the main chain and 1,3,4-oxadiazole moieties as pendent group.

首先合成新型双胺N'-(4-aminophenyl)-N'-4-(5-phenyl-1，3，4-oxadiazol-2-ylphenylbenzene-1，4-diamine后，与一系的芳香族二酐进聚缩合反应，可制得一系列三苯胺为主链且1，3，4-恶二唑为侧链的聚醯亚胺。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。