微波辐射下一步合成2-甲氧基-3-氰基-4-芳基吡啶和2-氨基-3-氰基-4-芳基吡喃衍生物

2，5－双亚苄基环戊酮与丙二腈在氢氧化钠－甲醇或哌啶－乙醇中，经微波辐射一步合成了2－甲氧基－3－氰基－4－芳基吡啶和2－氨基－3－氰基－4－芳基吡喃衍生物，反应在3－9mi内完成，产率56％－78％。     

Passivating Defects of Perovskite Solar Cells with Functional Donor-Acceptor–Donor Type Hole Transporting Materials

In this study, a series of donor–acceptor–donor (D-A-D) type small molecules based on the fluorene and diphenylethenyl enamine units, which are distinguished by different acceptors, as holetransporting materials (HTMs) for perovskite solar cells is presented. The incorporation of the malononitrile acceptor units is found to be beneficial for not only carrier transportation but also defects passivation via Pb–N interactions. The highest power conversion efficiency of over 22% is achieved on cells based on V1359, which is higher than that of spiro-OMeTAD under identical conditions. This st shows that HTMs prepared via simplified synthetic routes are not only a low-cost alternative to spiro-OMeTAD but also outperform in efficiency and stability state-of-art materials obtained via expensive cross-coupling methods.     

Reaction of dithiocarbamates with malononitrile dimer; simple synthesis of new 1,4-dihydropyridine-2-thiols

Dithiacarbamates reacted with malononitrile dimer to give 1,4-dihydropyridine-2-thiols. The structures of the obtained products were proven by IR, mass, and NMR spectra and elemental analyses. The reaction mechanism is also discussed.     

1-甲基- 5 -氨基-4-氰基吡唑的合成

为改进传统的用剧毒的甲肼作原料的缺点，创新地采用二步反应合成1-甲基-4-氰基-5-氨基吡唑，丙二腈与原甲酸三乙酯反应得到乙氧基亚甲基丙二腈；其产物再与硫酸甲肼反应得到1-甲基-4-氰基-5-氨基吡唑。该方法条件温和，收率高，从而为合成1-甲基-4-氰基-5-氨基吡唑找到工业化生产的工艺。     

Green chemistry: microwave-assisted facile synthesis of 6-imino-1,3,4-thiadiazenes from reaction of thiocarbohydrazones with malononitrile dimer

The reactions of thiocarbohydrazones with malononitrile dimer under microwave irradiation are reported. These reactions give 6-imino-1,3,4-thiadiazines in good yields. The structures of products were elucidated by MS, IR and NMR spectra together with elemental analyses. The reaction mechanism was discussed.     

Characterization and gamma radiation effects on poly(methyl methacrylate) doped with some benzylidene polymers

Anionic solution polmerization studies of benzylidene malononitrile, benzylidene ethyl cyanoacetate and their para chloro derivtives in dimethyl formamide (DMF) as a reaction medium using pipridene as initiator under nitrogen atmosphere at 100 °C were carried out. Infrared, ¹H NMR and ultraviolet-visible (UV-Vis) spectroscopic studies for the obtained polymers were investigated. The effect of γ-irradiation on PMMA films doped with 1 % of the benzylidene polymers was investigated by uv-vis spectroscopy. A change in the intensity of absorption bands with increasing irradiation dose was recorded. It is suggested that PMMA films doped with this type of benzylidene polymer can be used as dosimeter.     

具有D-π-A结构的三苯胺衍生物的合成及其性能

以三苯胺、5-醛基-2-噻吩硼酸、丙二腈为主要原料,合成了一种具有D-π-A结构的三苯胺衍生物2-[5-[4-(N,N-二苯氨基)苯基]噻吩基]亚甲基丙二腈(DPTM)。通过FTIR、1H NMR和元素分析对该化合物的结构进行了表征,考察了其UV-Vis光谱、荧光光谱、电化学行为和热稳定性。研究结果表明,DPTM具有溶液成膜性,DPTM的二氯甲烷溶液及其固态薄膜均显示出很强的红色荧光,荧光量子产率为79.15%;DPTM的HOMO能级为-5.51 eV,与正电极的功函数(-4.8 eV)相匹配,可有效降低空穴注入的能垒,有利于空穴的注入和传输;DPTM的热分解温度为182℃,具有良好的热稳定性。DPTM有望作为一种具有空穴传输性能和发光性能的新型红色发光材料。     

Organocatalytic Enantioselective Michael Reaction of Malononitrile with β,β‐Disubstituted Nitroalkenes

We have developed and optimized an enantioselective Michael reaction of malononitrile with β,β‐disubstituted nitroalkenes. This reaction was catalyzed by a cinchona alkaloid derived thiourea catalyst, producing products of high yields (up to 98 %) and stereoselectivities (up to 93 % ee). One of the adducts was used as an intermediate for the synthesis of dihydropyrrole derivative bearing a synthetically valuable quaternary chiral center.

     

以丙尔金为主盐的高纯度可焊性镀金工艺

以清洁环保的丙尔金[即一水合柠檬酸一钾二(丙二腈合金(I))]代替有毒氰化亚金钾为主盐,用市售的可焊性镀金工艺配方及规范,生产高纯度(99.99%)的金镀层。所得镀金层呈浅柠檬黄色、无色斑,比亚硫酸盐纯金层更均匀、致密,金线键合强度经高低温循环试验后稳定,与载体焊接牢固、无空穴,满足美国军标MIL-STD-883H–2010中方法2011.8──键合强度测试规范的性能要求。镀金液性能与亚硫酸盐纯金镀液相近。镀金液使用3年多后,不论是在加热状态或是长期放置都很稳定。     

水介质中吡喃香豆素衍生物的一釜合成

水介质中四丁基溴化铵（TBAB r）催化下,芳香醛、4-羟基香豆素和丙二腈经微波辐射一釜合成了一系列2-氨基-3-氰基-4-芳基-4H-吡喃并[3,2-c]香豆素的衍生物。该方法具有反应时间短,收率高,后处理简便,环境友好等优点。