共查询到19条相似文献,搜索用时 46 毫秒
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以2,3,4,5-四碘代噻吩为起始原料,经Suzuki偶联反应和三氯化铁氧化成环反应,合成了三个新型的苯并噻吩七元稠环芳烃衍生物,其结构经1H NMR,13C NMR,MS,IR和元素分析表征。 相似文献
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本文用3,4-二苯基-2,5-二(3,5-二溴苯基)环戊二烯酮(4a)与二苯乙炔(5a)通过Diels-Alder环加成反应得到1,2,4,5-四苯基-3,6-二(3,5-二溴苯基)苯(6a)。化合物6a通过经典的Suzuki偶联反应得到1,2,4,5-四苯基-3,6-二(3,5-二(4-十二烷基噻吩))苯基苯(8a),再利用Fe Cl3作为氧化剂发生Scholl氧化脱氢关环反应,得到目标化合物1a。采用类似合成方法,得到目标化合物1b。化合物的结构均通过1H NMR和MALDI-TOF MS表征,并对其光谱特征、热性能及电学性能进行了初步研究。 相似文献
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以2,3,4,5-四碘代噻吩为起始原料,利用Suzuki偶联反应来构筑分子骨架,合成了3个氰基和烷基修饰的新型寡聚噻吩衍生物,其结构经1H NMR,13C NMR,EI-MS和元素分析表征。 相似文献
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以烷基噻吩硼酸钠盐为起始原料,经Suzuki偶联反应、皂化反应、酰基化反应、分子内Friedel-Crafts成环等反应,成功地合成了一系列新型并噻吩五元杂环酮类衍生物,其结构经NMR,IR,MS和元素分析表征. 相似文献
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受Kratscher等[1]电弧法合成C60工作的启发,本课题组近年来以独创的液相电弧、微波放电等方法,合成了C50及其多种全氯代碎片[2-5].本文通过我们最近发展的脉冲激光溅射方法在四氯化碳的蒸汽中溅射石墨,得到丰富的克量级产物.这些产物经HPLC-UV-MS联用技术,表征为全氯代多环芳烃.其中部分物质含有五元环,可以看作是富勒烯形成过程中产生的全氯代碎片,该研究结果不仅有助于了解富勒烯的形成机理,而且展示了激光溅射合成法应用前景.1实验部分 实验在特制的反应装置上进行,所用的脉冲激光为Q-… 相似文献
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因环钯化合物具有结构简单、性能稳定、反应活性高等优点,常被作为催化剂使用。总结了环钯化合物的合成方法及其在Suzuki偶联反应中的应用。 相似文献
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有机半导体材料的开发为有机电子学的发展提供了材料基础。杂原子的引入进一步丰富了材料的种类和数量。作为CC单元的等电子体,BN单元对有机半导体材料的性能调节受到了科学家们的关注。本文主要介绍了有机共轭体系中BN单键的构筑方法,以及这类硼氮杂稠环分子在有机电子学领域的应用。 相似文献
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Synthesis,Electronic Properties and WOLED Devices of Planar Phosphorus‐Containing Polycyclic Aromatic Hydrocarbons 下载免费PDF全文
Dr. François Riobé Rózsa Szűcs Dr. Pierre‐Antoine Bouit Dr. Denis Tondelier Bernard Geffroy Fátima Aparicio Julia Buendía Prof. Luis Sánchez Prof. Régis Réau Prof. László Nyulászi Prof. Muriel Hissler 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(17):6547-6556
We describe the synthesis and the physical properties of polyaromatic hydrocarbons (PAHs) containing a phosphorus atom at the edge. In particular, the impact of the successive addition of aromatic rings on the electronic properties was investigated by experimental (UV/Vis absorption, fluorescence, cyclic voltammetry) and theoretical studies (DFT). The physical properties recorded in solution and in the solid state showed that the P‐containing PAHs exhibit properties expected for an emitter in white organic light‐emitting diodes (WOLEDs). 相似文献
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Marcus Richter Sebastian Hahn Dr. Evgenia Dmitrieva Dr. Frank Rominger Dr. Alexey Popov Prof. Dr. Uwe H. F. Bunz Prof. Dr. Xinliang Feng Dr. Reinhard Berger 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(5):1345-1352
Polycyclic aromatic azomethine ylides (PAMYs) are powerful building blocks in the bottom-up synthesis of internally nitrogen-containing polycyclic aromatic hydrocarbons (N-PAHs) through 1,3-cycloaddition reactions. In this work, the cycloaddition reaction of PAMYs to asymmetric ortho-quinones is presented, which, in contrast to the addition to symmetric para-quinones, facilitates subsequent condensation reactions and allows the synthesis of three helical N-PAHs with ullazine-quinoxaline ( UQ - 1 – 3 ) backbones. UQ - 1 and UQ - 2 possess two helical centers; however, single-crystal X-ray analysis together with the computational modeling of UQ - 3 elucidate the formation of only the thermodynamically most stable geometry with four helical centers in a (P,P,M,M) configuration. For the series UQ - 1 – 3 , the number of redox steps is directly correlated with the number of ullazine or quinoxaline units incorporated into the targeted molecular backbones. A detailed investigation of the spectroscopic and magnetic properties of the radical cation and anion as well as the dication and dianion species by in situ EPR/UV/Vis-NIR spectroelectrochemistry is provided. The excellent optical and redox properties combined with helical geometries render them possibly applicable as chiral emitter or ambipolar charge transport material in organic electronics. 相似文献
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Boron‐Containing Polycyclic Aromatic Hydrocarbons: Facile Synthesis of Stable,Redox‐Active Luminophores 下载免费PDF全文
M. Sc. Valentin M. Hertz Dr. Michael Bolte Dr. Hans‐Wolfram Lerner Prof. Dr. Matthias Wagner 《Angewandte Chemie (International ed. in English)》2015,54(30):8800-8804
Herein we show that replacing the two meso carbon atoms of the polycyclic aromatic hydrocarbon (PAH) bisanthene by boron atoms transforms a near‐infrared dye into an efficient blue luminophore. This observation impressively illustrates the impact of boron doping on the frontier orbitals of PAHs. To take full advantage of this tool for the targeted design of organic electronic materials, the underlying structure–property relationships need to be further elucidated. We therefore developed a modular synthesis sequence based on a Peterson olefination, a stilbene‐type photocyclization, and an Si–B exchange reaction to substantially broaden the palette of accessible polycyclic aromatic organoboranes and to permit a direct comparison with their PAH congeners. 相似文献
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Valentin M. Hertz Michael Bolte Hans‐Wolfram Lerner Matthias Wagner 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2015,127(30):8924-8928
Herein we show that replacing the two meso carbon atoms of the polycyclic aromatic hydrocarbon (PAH) bisanthene by boron atoms transforms a near‐infrared dye into an efficient blue luminophore. This observation impressively illustrates the impact of boron doping on the frontier orbitals of PAHs. To take full advantage of this tool for the targeted design of organic electronic materials, the underlying structure–property relationships need to be further elucidated. We therefore developed a modular synthesis sequence based on a Peterson olefination, a stilbene‐type photocyclization, and an Si–B exchange reaction to substantially broaden the palette of accessible polycyclic aromatic organoboranes and to permit a direct comparison with their PAH congeners. 相似文献
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Andrew S. S. Wilson Chiara Dinoi Michael S. Hill Mary F. Mahon Laurent Maron Emma Richards 《Angewandte Chemie (International ed. in English)》2020,59(3):1232-1237
A molecular calcium hydride effects the two electron reduction of polyaromatic hydrocarbons, including naphthalene (E0=?3.1 V). 相似文献
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Yijing Chen Weinan Chen Yanjun Qiao Prof. Dr. Gang Zhou 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(39):9326-9338
A series of polycyclic aromatic hydrocarbons (PAHs), consisting of two pairs of BN units, have been designed and their synthesis has been achieved by electrophilic C−H borylation. Two conjugation extension directions can be found in these B2N2-embedded PAHs. The B2N2-containing backbone with shorter effective conjugation length is isoelectronic with diaryl-fused anthracene, whereas the second derivative, with longer effective conjugation length, is isoelectronic with bis(trans-arylvinyl)benzene. By incorporating different aryl groups, i.e., furyl, thienyl, benzo[b]furyl, and benzo[b]thienyl groups, into the two crossed directions of the B2N2-embedded PAHs, their electronic and optical properties have been comparatively investigated by photophysical, electrochemical, and theoretical approaches. It is found that both the substituents and their conjugation extension directions have significant effects on the aromatic and photophysical properties of the B2N2-embedded PAHs. The conjugation extension in the shorter backbone is more pronounced on the effective conjugation length than the longer backbone. Moreover, all the B2N2-embedded PAHs behave as both Lewis acids and Lewis bases, and reversible photoluminescence switching can be observed by simply neutralizing the added Lewis acid or Lewis base. 相似文献