Synthesis and spectroscopic–voltammetric behaviors of silver(I) 2,5-diphenylthiazolo[5,4-d]thiazole
摘要:
In the present work, 2,5-diphenylthiazolo[5,4-d]thiazole (DTT) and silver(I) 2,5-diphenylthiazolo[5,4-d]thiazole complex(Ag2DTT) were synthesized, and then their spectroscopic and voltammetric behaviors were investigated. The DTT was obtained by the reaction of rubeanic acid and benzaldehyde. Then the Ag2DTT was prepared using AgNO3 and DTT in DMSO. The DTT and Ag2DTT were examined by FT-IR, UV-vis. absorption and fluorescence spectroscopy. The UV-vis. measurements showed the formation of M2L type complex. The molar absorptivity coefficients (epsilon) of DTT and Ag2DTT at 420 nm were found as 11,952 and 21,747 L/cm mol in DMSO, and 11,062 and 13,861 L/cm mol in CH3CN, respectively. In addition, the electrochemistry of both DTT and Ag2DTT was performed using cyclic voltammetry. The HOMO-LUMO band gaps of DTT and Ag2DTT were calculated as 3.26 and 2.96 eV, respectively. The fluorescence measurements showed that both DTT and Ag2DTT have fluorescence emissions at 451 nm in DMSO with the excitation at 380 nm. The metal complexes of 2,5-diphenylthiazolo[5,4-d]thiazole can be useful for various electronic and optical applications. (C) 2013 Elsevier Ltd. All rights reserved.
Microwave-assisted synthesis of 2,5-diarylthiazolo[5,4-d]thiazoles from benzaldehydes and dithiooxamide
作者:L. K. Papernaya、A. A. Shatrova、I. V. Sterkhova、G. G. Levkovskaya、I. B. Rozentsveig
DOI:10.1134/s1070428015030148
日期:2015.3
One-pot condensation of dithiooxamide with aromatic aldehydes and subsequent oxidation of intermediate 2,5-dihydro[1,3]thiazolo[5,4-d][1,3]thiazoles with selenium dioxide afforded 2,6-diaryl[1,3]thiazolo-[5,4-d][1,3]thiazoles which were characterized by 1H and 13C NMR, IR, and X-ray diffraction data.
一锅缩合二硫代草酰胺与芳族醛,然后将中间体2,5-二氢[1,3]噻唑并[5,4- d ] [1,3]噻唑与二氧化硒氧化,得到2,6-二芳基[1, 3]噻唑-[5,4- d ] [1,3]噻唑,其特征在于1 H和13 C NMR,IR和X射线衍射数据。
Diboron-containing fluorophores with extended ladder-type π-conjugated skeletons
A series of ladder type Ï-conjugated diboron complexes 1â4 have been designed and synthesized by a very simple synthetic procedure. Single crystals of complex 3 were grown and the molecular structure determined by X-ray diffraction analysis demonstrated that this type of diboron ladder has a rather planar skeleton. All complexes possess very high melting points (275â383 °C) and decomposition temperatures (Td5: 343â400 °C), indicative of their high thermal stabilities. The electrochemical and photophysical properties as well as theoretical calculations were investigated, suggesting the possibility of these boron complexes as efficient emitters in optoelectronics.
通过非常简单的合成程序,我们设计并合成了一系列梯形Ï-共轭二硼络合物 1â4 。通过 X 射线衍射分析确定的分子结构表明,这种二硼梯形络合物具有相当平面的骨架。所有复合物都具有很高的熔点(275Â383 °C)和分解温度(Td5:343Â400 °C),表明它们具有很高的热稳定性。研究人员对这些硼络合物的电化学和光物理性质以及理论计算进行了研究,结果表明,这些硼络合物有可能成为光电子学中的高效发光体。
MATERIAL FOR ORGANIC ELECTROLUMINESCENT ELEMENTS AND ORGANIC ELECTROLUMINESCENT ELEMENT
申请人:Takata Yoshiyuki
公开号:US20090156827A1
公开(公告)日:2009-06-18
An object of the present invention is to provide a material for high-brightness, high-efficiency, longer-life organic EL elements and an organic EL element produced by using the same.
Provided is a material for organic EL elements, comprising a compound represented by the following General Formula (1):
wherein, R
1
and R
2
each independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group.
molecules and their silver complexes were synthesized. The optical microscopy, UV-vis. absorption spectroscopy, FT-IR spectroscopy, cyclic voltammetry (CV) and the band energies of the synthesized aryl / hydroxy aryl thiazolo[5,4-d]thiazole molecules and their silver complexes were studied. The HOMO and LUMO energy levels were obtained from the CV voltammograms. The optical band gap (EgOpt.) and the
另外,在本工作中,苯基- ,ö羟基苯基,邻,对-羟基苯基- ,p -羟基苯基和ö -羟基萘基-噻唑并[5,4- d ]噻唑染料分子和它们的银络合物合成. 光学显微镜,UV- vis。吸收光谱、FT-IR 光谱、循环伏安法 (CV) 和合成的芳基/羟基芳基噻唑并 [5,4- d ] 噻唑分子及其银配合物的带能进行了研究。从 CV 伏安图获得 HOMO 和 LUMO 能级。光学带隙 ( E g Opt . ) 和电化学带隙 ( E gCV ) 能量是从 UV- vis计算的。分别是吸收和 CV。发现噻唑并[5,4- d ]噻唑单元的羟基芳基和银配位的存在改变了UV- vis。噻唑并 [5,4-d] 噻唑分子的吸收光谱和带隙能量。在所研究的噻唑并 [5,4- d ] 噻唑分子及其银配合物中, 双(对羟基苯基)-噻唑并银的带隙能量为E g opt = 2.07 eV 和E g CV = 1.67
Microwave-activated synthesis of thiazolo[5,4-d]thiazoles by a condensation/oxidation sequence
A microwave-assisted preparation of symmetrical thiazolo[5,4-d]thiazoles from the corresponding aldehydes is presented. The two-step reaction sequence comprises the condensation of aldehydes with dithiooxamide followed by oxidation/aromatization with 1,4-benzoquinone derivatives. The new procedure provides the desired products in good yields and in most cases allows reduction of the excess of aldehyde
介绍了一种微波辅助从相应的醛类制备对称的噻唑并[5,4- d ]噻唑的方法。两步反应序列包括醛与二硫代草酰胺的缩合,然后用1,4-苯醌衍生物的氧化/芳构化。与以前的方法相比,新方法以高收率提供了所需的产品,并且在大多数情况下,可以减少工艺中使用的过量醛。首次展示了该反应在芳族和脂族醛上的应用。