Novel π-extended porphyrin derivatives for use in dye-sensitized solar cells
摘要:
成功合成了两种新型供体-π-受体(D-π-A 型)卟啉染料,并将其用于染料敏化太阳能电池(DSSC)。这两种卟啉的分子结构都是由相同的二烷基取代二苯基氨基单元作为供体部分,并在 5,15-meso 位置上有两个双烷氧基苯基取代基。受体部分由不同的乙炔连接π-延伸桥和作为锚定基团的氰基丙烯酸(染料 I)或羧基苯基(染料 II)组成。为了研究在卟啉和受体单元之间加入π-延伸桥的效果,我们采用了两种不同的π-延伸桥,如 2,2′-噻吩和 2-(苯乙炔基)-噻吩。其中,染料 II 在供体取代的卟啉和羧酸基团之间含有两个三键。这些修饰可能会减少染料在 TiO 2 表面的聚集。在所有测得的偏置电位范围内,含有染料 II 的电池的电荷重组电阻和扩散长度都相对较高,这意味着当染料 II 分子吸附在 TiO 2 表面时,注入电子的电子重组损耗被高度抑制。最终,在 AM 1.5 照明(100 mW.cm-2)条件下,在 0.46 cm2 的光活性区域内,含有 2,2′-噻吩 π-间隔物并通过羧基苯基锚定的染料 II 比通过氰基丙烯酸基锚定 2-(苯乙炔基)噻吩(PCE = 3.5%)的染料 I 显示出更高的功率转换效率,达到 6.7%。
一类新的含卟啉的聚酰亚胺的,ZnPor-小号-DSDA,ZnPor-吨-DSDA,卟小号-DSDA和卟吨-DSDA,从含卟啉的二胺和3,3合成',4,4' -二苯砜四羧酸二酐用于电阻型存储器应用。通过电化学,分子模拟和记忆行为研究了连接键和锌金属的作用。具有不同保留时间的存储设备源自聚合物ZnPor- s -DSDA(WORM,> 3 h)和ZnPor- t -DSDA(DRAM,30秒)证明的联动效应的重要性,和聚酰亚胺的绝缘性卟小号-DSDA和卟吨-DSDA通过金属螯合也暗示了至关重要的记忆行为。
Anchoringgroups are extremely important in controlling the performance of dye‐sensitized solarcells (DSCs). The design and characterization of sensitizers with new anchoringgroups, in particular non‐carboxylic acid groups, has become a recent focus of DSC research. Herein, new donorπacceptor zincporphyrin dyes with a pyridinering as an anchoringgroup have been designed and synthesized for applications
锚固基团对于控制染料敏化太阳能电池(DSC)的性能极为重要。具有新的锚定基团,特别是非羧酸基团的敏化剂的设计和表征,已成为DSC研究的重点。在此,新的供体 π 受体锌卟啉染料与吡啶环作为锚固基团已经被设计和用于在DSC的应用合成。光物理和电化学研究表明,吡啶环可有效用作卟啉敏化剂的锚定基团。基于这些新卟啉的DSC在充满阳光的条件下(AM 1.5G,100 mW cm -2)表现出约4.0%的总功率转换效率。
Fluorous hydrophobic fluorescent (E)-Stilbene derivatives for application on security paper
作者:Albert Granados、Adelina Vallribera
DOI:10.1016/j.dyepig.2019.107597
日期:2019.11
(E)-Stilbene hydrophobic fluorophores possessing long perfluorinated or hydrocarbonated chains have been prepared through a stereoselective Wittig-Schlosser reaction. When covalently grafted upon paper, they give rise to a fluorescent-labeled paper upon irradiation with UV light. The hydrophobicity and oleophobicity of the fluorous (E)-stilbene derivative furnish self-cleaning properties. Application in the detection of money counterfeiting is envisioned.
Double Fence Porphyrins that are Compatible with Cobalt(II/III) Electrolyte for High‐Efficiency Dye‐Sensitized Solar Cells
作者:Ching‐Chin Chen、Jia‐Sian Chen、Vinh Son Nguyen、Tzu‐Chien Wei、Chen‐Yu Yeh
DOI:10.1002/anie.202013964
日期:2021.2.23
remarkable cell performance of doublefenceporphyrinsensitizers can be attributed to reduced dye aggregation and a decreased charge‐recombination rate. Notably, porphyrins bJS2 and bJS3 exhibit better efficiency than the benchmark YD2‐o‐C8 (9.83 % in this work), demonstrating that the doublefence structure is a promising design strategy for efficient porphyrinsensitizers in high‐performance DSSCs
Analogs of platelet activating factor. 6. Mono- and bis-aryl phosphate antagonists of platelet activating factor
作者:A. Wissner、M. L. Carroll、K. E. Green、S. S. Kerwar、W. C. Pickett、R. E. Schaub、L. W. Torley、S. Wrenn、C. A. Kohler
DOI:10.1021/jm00087a023
日期:1992.5
A series of aryl phosphoglyceride (3, 19-6 1) and bis-aryl phosphate (67-135) antagonists of platelet activating factor (PAF) were prepared. A group of four bifunctional phosphorus reagents (5a-c and 7) were developed that allowed the preparation of these aryl phosphates in which the position of aromatic substitution can be varied. These compounds were examined for their ability to inhibit PAF-induced platelet aggregation of rabbit platelets. Selected compounds were also evaluated for their ability to displace [H-3]PAF from its receptor on rabbit platelets. These in vitro data were compared to similar data obtained for a number of known PAF antagonists. The compounds were evaluated in vivo, in both the mouse and rabbit, for their ability to prevent death induced by a lethal challenge of PAF. The relationships between the biological activity and the nature, lipophilicity, and position of substituents of the aromatic rings were studied. Compound 105 (CL 184005) has been selected to undergo further development as a potential therapeutic agent for the treatment of septic shock in man.