A Direct Synthesis of Selenophenes by Cu-Catalyzed One-Pot Addition of a Selenium Moiety to (E,E)-1,3-Dienyl Bromides and Subsequent Nucleophilic Cyclization
摘要:
An efficient protocol for the synthesis of selenophenes and selanyl selenophenes has been achieved by a simple one-pot reaction of 1,3-dienyl bromides and 1,3-dienyl-gem-dibromides respectively with KSeCN catalyzed by CuO nanoparticles. Several aryl, alkenyl, heteroaryl, and alkyl substituted selenophenes were obtained with a broad array of functional group tolerance. This is found to be a general methodology for chalcogenophenes being effective for the synthesis of thiophenes too.
Conjugated Polymers with Repeated Sequences of Group 16 Heterocycles Synthesized through Catalyst-Transfer Polycondensation
作者:Chia-Hua Tsai、Andria Fortney、Yunyan Qiu、Roberto R. Gil、David Yaron、Tomasz Kowalewski、Kevin J. T. Noonan
DOI:10.1021/jacs.6b01916
日期:2016.6.1
the materials. Grazing incidence wide-angleX-rayscattering of the thiophene-selenophene copolymers indicated that the π-stacking distance increased with incorporation of the larger heteroatom (from ∼3.7-4.0 Å), while the lamellar spacing decreased (from ∼15.8-15.2 Å). The study also revealed that periodic sequences allow electronic properties to be tuned while retaining nanofibrillar morphologies
Controlling Phase Separation and Optical Properties in Conjugated Polymers through Selenophene−Thiophene Copolymerization
作者:Jon Hollinger、Ashlee A. Jahnke、Neil Coombs、Dwight S. Seferos
DOI:10.1021/ja103191u
日期:2010.6.30
Selenophene-thiophene blockcopolymers were synthesized and studied. The properties of these novel blockcopolymers are distinct from those of statistical copolymers prepared from the same monomers with a similar composition. Specifically, the blockcopolymers exhibit broad and red-shifted absorbance features and phase-separated domains in the solid state. Scanning transmission electron microscopy
Homogeneous Synthesis of Monodisperse Sequence‐Defined Conjugated Oligomers by Temperature Cycling
作者:Hao Xu、Shuyang Ye、Ruyan Zhao、Dwight S. Seferos
DOI:10.1002/anie.202210340
日期:2022.9.26
well-defined macromolecules has been one of the ultimate goals and challenges for polymer chemists for decades. This work reports the first homogeneous synthesis of monodisperse sequence-defined conjugated oligomers. The synthesis is supported by catalyst transfer polymerization and a custom Python-based automated program.
Regioregular poly(3-hexyl)selenophene: a low band gap organic hole transporting polymer
作者:Martin Heeney、Weimin Zhang、David J. Crouch、Michael L. Chabinyc、Sergey Gordeyev、Rick Hamilton、Simon J. Higgins、Iain McCulloch、Peter J. Skabara、David Sparrowe、Steve Tierney
DOI:10.1039/b712398a
日期:——
The synthesis of regioregular poly(3-hexyl)selenophene is reported, and its optical and electrical properties are compared to those of regioregular poly(3-hexyl)thiophene.
Synthesis, Characterization, and Field Effect Transistor Properties of Regioregular Poly(3-alkyl-2,5-selenylenevinylene)
作者:Mohammed Al-Hashimi、Mohammed A. Baklar、Florian Colleaux、Scott E. Watkins、Thomas D. Anthopoulos、Natalie Stingelin、Martin Heeney
DOI:10.1021/ma200910a
日期:2011.7.12
Here we report the synthesis of novel poly(3-alkyl-2,5-selenylenevinylene)s (PSV) by the polymerization of 2,5-dibromo-3-alkylselenophene and (E)-1,2-bis(tributylstannyl)ethylene under microwave-assisted Stille coupling conditions. Polymers containing hexyl and decyl side chains were prepared. The decyl-substituted polymer exhibited good solubility in common organic solvents, and 1H NMR analysis indicated
在这里我们报告了通过2,5-二溴-3-烷基硒烯和(E)-1,2-双(三丁基锡烷基)乙烯的聚合反应合成新型聚(3-烷基-2,5-亚硒基亚乙烯基)(PSV)在微波辅助的Stille耦合条件下。制备了含有己基和癸基侧链的聚合物。癸基取代的聚合物在常见的有机溶剂中显示出良好的溶解性,1 H NMR分析表明侧链区域规则性超过90%。该聚合物在溶液中在621 nm处显示最大吸收,成膜时吸收有明显的红移。由PSV制成的薄膜晶体管表现出的空穴载流子迁移率高达0.01 cm 2/(V s)。当将不含羟基的有机电介质用作栅极绝缘体时,聚合物显示出平衡的双极性性能。