perylenetetracarboxy-3,4:9,10-diimides, bearing 2,6-diisopropylphenyl groups at the imide positions and 4-(R-ethynyl)phenoxy moieties (R = 4,7-di(2-thienyl)benzo[c][1,2,5]thiadiazole (P2), pyrene (P3) or pyrene-CH2OCH2 (P4)) at the four bay positions, were prepared, along with the known related derivative (R = phenyl (P1)), and well characterized. They have large two-photonabsorption (TPA) cross-sections (σ2),
三个新的per四羧基-3,4:9,10-二酰亚胺,在酰亚胺位置带有2,6-二异丙基苯基和4-(R-乙炔基)苯氧基部分(R = 4,7-二(2-噻吩基)苯并[制备了四个间隔位置的c ] [1,2,5]噻二唑(P2),pyr(P3)或pyr-CH 2 OCH 2(P4)),以及已知的相关衍生物(R =苯基(P1)),并具有良好的特征。它们具有大的双光子吸收(TPA)截面(σ 2),如由Z扫描技术确定的,被与达到最高值P2其带有一个平面π-离域供体部分。P3的特征在于较高的σ 2个不是两个值P1,如预期的施主芘部分相对于苯基,具有较高的π共轭P4,由于柔性和非共轭CH存在2 OCH 2之间桥compound和乙炔基片段在后一个化合物中。通过DFT模型对P1-P4的分子几何结构进行了优化,显示出在P2和P3中,由于bay和噻吩基团的π-π相互作用,海湾取代基被堆叠起来。P1–P4的LUMO原子具有
Platinum(II)-Bis(aryleneethynylene) Complexes for Solution-Processible Molecular Bulk Heterojunction Solar Cells
small‐molecularplatinum(II)–bis(aryleneethynylene) complexes consisting of benzothiadiazole as the electron acceptor and triphenylamine and/or thiophene as the electron donor were conveniently synthesized and characterized by physicochemical and computational methods, and utilized as the electron‐donor materials in the fabrication of solution‐processed bulkheterojunction (BHJ) solarcells. The effect
方便地合成了四种新的可溶液处理的小分子铂(II)-双(亚芳基乙炔)配合物,它们由苯并噻二唑作为电子受体,三苯胺和/或噻吩作为电子供体,并通过理化和计算方法进行了表征,并被用作溶液处理体异质结(BHJ)太阳能电池制造中的电子给体材料。还检查了这些小分子中不同的电子给体基团对光电和光伏特性的影响。光学和随时间变化的密度泛函理论研究表明,强电子给体基团的结合显着增强了配合物的太阳吸收能力。71丁酸甲酯(PC 70 BM)作为电子受体。在AM 1.5太阳能电池模拟器的照明下,开路电压为0.83 V,短路电流密度为7.10 mA cm -2且填充系数为0.40时,可实现2.37%的最佳功率转换效率。旋涂薄膜显示出p沟道场效应电荷传输,这些分子的空穴迁移率高达2.4×10 -4 cm 2 V -1 s -1。本工作阐明了定义明确的有机金属络合物在开发捕光小分子以实现有机光伏发电中高效发电方面的潜力。
Synthesis and photovoltaic properties of new ruthenium(II)-bis(aryleneethynylene) complexes
作者:Qian Liu、Cheuk-Lam Ho、Nianyong Zhu、Yingying Fu、Zhiyuan Xie、Lixiang Wang、Pierre D. Harvey、Wai-Yeung Wong
DOI:10.1016/j.jorganchem.2017.06.026
日期:2017.10
A new series of small-molecular ruthenium(II)-diynes trans-Ru(dppe)2(C≡CAr)2 (D1−D4) (dppe = Ph2CH2CH2Ph2; Ar = aromatic moiety) have been successfully designed, synthesized and characterized by photophysical, electrochemical and computational methods, and complexes D1 and D3 were crystallographically characterized. The optical and time-dependent density functional theory studies showed that the absorption
Synthesis and Characterization of Luminescent Cyclometalated Platinum(II) Complexes with Tunable Emissive Colors and Studies of Their Application in Organic Memories and Organic Light-Emitting Devices
series of luminescent cyclometalated N^C^N [N^C^N = 1,3-bis(N-alkylbenzimidazol-2'-yl)benzene]platinum(II) alkynyl and carbazolyl complexes has been prepared. The structure of one platinum(II) carbazolyl complex has been characterized by X-ray crystallography. The corresponding electrochemical and photophysical properties have been explored and analyzed. The N^C^N platinum(II) complexes displayed rich
已经制备了一系列发光的环金属化 N^C^N [N^C^N = 1,3-双(N-烷基苯并咪唑-2'-基)苯]铂(II)炔基和咔唑基配合物。一种铂 (II) 咔唑基配合物的结构已通过 X 射线晶体学表征。已经探索和分析了相应的电化学和光物理性质。N^C^N 铂 (II) 配合物在脱气二氯甲烷溶液中显示出丰富的发光,其发射曲线取决于配位的炔基和咔唑基配体。它们的发射能量与炔基和咔唑基配体的电子特性相关。在计算研究的支持下,通过改变炔基和咔唑基配体的电子特性,可以微调发射能量以覆盖广泛的可见光谱。供体-受体铂 (II) 复合物已被用于制造具有低工作电压、高开/关比和长保留时间的二元存储器性能的存储器件。已基于另一种铂 (II) 咔唑基配合物制造了可溶液加工的 OLED,其最大外量子效率高达 7.2%,与基于小分子对应物的真空沉积器件的效率相当,说明含铂 (II) 材料的多功能性。
Cell imaging using red fluorescent light-up probes based on an environment-sensitive fluorogen with intramolecular charge transfer characteristics
作者:Guangxue Feng、Jie Liu、Ruoyu Zhang、Bin Liu
DOI:10.1039/c4cc04654d
日期:——
We report a general strategy to design and synthesize red fluorescent light-upprobes for cellular imaging based on a fluorogen with intramolecular charge transfer characteristics.