Furthermore, we provide a fully optimized synthesis and systematic variations towards redox‐matched, broadly and intensely absorbing, cyclometalated ruthenium(II) complexes. Most of them show a weak room‐temperature emission and a prolonged excited‐state lifetime. They display a broad absorption up to 700 nm and high molar extinctioncoefficients up to 20 000 M−1 cm−1 of the metal‐to‐ligand charge transfer
合成了一系列系统性的单击衍生的1,3-双(1,2,3-三唑-4-基)苯N ^ C ^ N配位配体的双(三齿)钌(II)配合物,并通过单晶X射线衍射,通过光化学和电化学方法进行研究,并通过计算方法进行研究。提出的全面表征可以更详细地了解无辐射失活机理。此外,我们提供了针对氧化还原匹配,广泛且强烈吸收的环金属化钌(II)配合物的完全优化的合成方法和系统的变化。它们中的大多数显示出较弱的室温发射和延长的激发态寿命。它们显示出高达700 nm的宽吸收性和高达20,000 M -1 cm的高摩尔消光系数 -1的金属-配体电荷转移带,导致黑色。因此,该络合物在染料敏化太阳能电池的应用中显示出巨大的潜力。
An Alternative Role for Acetylenes: Activation of Fluorobenzenes toward Nucleophilic Aromatic Substitution
作者:Nicholas P. Bizier、Jay Wm. Wackerly、Eric D. Braunstein、Mengfei Zhang、Stephen T. Nodder、Stephen M. Carlin、Jeffrey L. Katz
DOI:10.1021/jo400668v
日期:2013.6.21
aspect of arylacetylene reactivity by utilizing alkynes as electron-withdrawing groups (EWG) for promoting nucleophilicaromaticsubstitution (SNAr) reactions. Reaction rates for the substitution of 4-(fluoroethynyl)benzenes by p-cresol were determined by 1H NMR spectroscopy, and these rate data were used to determine substituent (Hammett) constants for terminal and substituted ethynyl groups. The synthetic
Single Step Synthesis of Acetylene-Substituted Oxacalix[4]arenes
作者:Jay Wm. Wackerly、Mengfei Zhang、Stephen T. Nodder、Stephen M. Carlin、Jeffrey L. Katz
DOI:10.1021/ol5010627
日期:2014.6.6
Oxacalixarenes bearing acetylene groups are synthesized in a single step by nucleophilic aromatic substitution reactions of orcinol with various 1,5-diethynyl-2,4-difluorobenzenes. Thermodynamic equilibration of the cyclooligomer mixtures was accomplished for arylethynyl activating groups, leading to increased yields of the corresponding oxacalix[4]arenes. A 1,3-alternate macrocycle conformation is observed in the solid state, presenting a large V-shaped pi-surface.