Synthesis of Highly Distorted π-Extended [2.2]Metacyclophanes by Intermolecular Double Oxidative Coupling
作者:Yutaro Koyama、Satoru Hiroto、Hiroshi Shinokubo
DOI:10.1002/anie.201301180
日期:2013.5.27
A strained relationship: Oxidation of dihydroxy‐substituted acenes provides face‐to‐face [2.2]metacyclophane‐like dimers (see scheme; O red, Si of iPr3Si groups blue). The products exhibited highly distorted structures caused by steric repulsion. UV/Vis and electrochemical analysis revealed that the HOMO–LUMO gap was decreased upon dimerization.
Substituent Effects in Pentacenes: Gaining Control over HOMO−LUMO Gaps and Photooxidative Resistances
作者:Irvinder Kaur、Wenling Jia、Ryan P. Kopreski、Selvapraba Selvarasah、Mehmet R. Dokmeci、Chandrani Pramanik、Nicol E. McGruer、Glen P. Miller
DOI:10.1021/ja804515y
日期:2008.12.3
A combined experimental and computational study of a series of substitutedpentacenes including halogenated, phenylated, silylethynylated and thiolated derivatives is presented. Experimental studies include the synthesis and characterization of six new and six known pentacenederivatives and a kinetic study of each derivative under identical photooxidative conditions. Structures, HOMO-LUMO energies
n-Doping of Organic Electronic Materials Using Air-Stable Organometallics: A Mechanistic Study of Reduction by Dimeric Sandwich Compounds
作者:Song Guo、Swagat K. Mohapatra、Alexander Romanov、Tatiana V. Timofeeva、Kenneth I. Hardcastle、Kada Yesudas、Chad Risko、Jean-Luc Brédas、Seth R. Marder、Stephen Barlow
DOI:10.1002/chem.201202591
日期:2012.11.12
Several 19‐electron sandwich compounds are known to exist as “2×18‐electron” dimers. Recently it has been shown that, despite their air stability in the solid state, some of these dimers act as powerful reductants when co‐deposited from either the gas phase or from solution and that this behavior can be useful in n‐doping materials for organic electronics, including compounds with moderate electron affinities
已知几种19电子夹心化合物以“ 2×18电子”二聚体的形式存在。最近的研究表明,尽管它们在固态下具有空气稳定性,但其中一些二聚体在从气相或溶液中共沉积时仍可作为强还原剂,这种行为可用于有机有机物的n掺杂材料中。电子学,包括具有中等电子亲和力的化合物,例如6,13-双[三(异丙基)甲硅烷基乙炔基]并五苯(3)。本文探讨了1,2,3,4,5-戊甲基罗丹烯(1 b 2),(五甲基环戊二烯基)(1,3,5-三烷基苯)钌(烷基= Me,2 a 2 ;烷基= Et,2 b 2)和(五甲基环戊二烯基)(苯)铁(2 c 2)在溶液中与3反应。可见/近红外和NMR光谱和X-射线晶体学表明,这些溶液反应的产物是3克.-单体夹层阳离子的盐。第8组二聚体的Vis / NIR动力学研究与从二聚体到3的负电子转移随后快速裂解二聚体阳离子的机理是一致的。使用部分氘代衍生物的NMR交叉实验表明,1 b 2二聚体中的CC键比2
Functionalized Pentacene: Improved Electronic Properties from Control of Solid-State Order
作者:John E. Anthony、James S. Brooks、David L. Eaton、Sean R. Parkin
DOI:10.1021/ja0162459
日期:2001.9.1
two-fold: First, the substituents should impart solubility to the acene, to simplify purification and processing. Second, the substituents should induce some capability for self-assembly of the aromatic moieties into ﷿-stacked arrays to enhance intermolecular orbital overlap. We anticipated that both of these goals could be accomplished by exploiting a rigid spacer to hold the necessarily bulky solubilizing
Fluorous Biphase Synthesis of a Poly(p-phenyleneethynylene) and its Fluorescent Aqueous Fluorous-Phase Emulsion
作者:Jeewoo Lim、Timothy M. Swager
DOI:10.1002/anie.201003111
日期:——
highly fluorinated compound with a rigid three‐dimensional architecture was synthesized as a monomer for poly(p‐phenyleneethynylene)s (PPEs). Fluorousbiphase reactions were applied for the synthesis of a PPE that is soluble only in fluorous solvents. A fluorous solution of the polymer could be processed into aqueous emulsions that display high fluorescence quantum yields (see picture).