2489-03-4Relevant articles and documents
On-surface synthesis of graphyne nanowires through stepwise reactions
Yu, Xin,Cai, Liangliang,Bao, Meiling,Sun, Qiang,Ma, Honghong,Yuan, Chunxue,Xu, Wei
, p. 1685 - 1688 (2020)
From an interplay of high-resolution UHV-STM imaging and DFT calculations, we have achieved on-surface synthesis of graphyne nanowires through stepwise reactions involving two different types of dehalogenative homocoupling reactions (i.e., C(sp3/sup
Direct Formation of C?C Triple-Bonded Structural Motifs by On-Surface Dehalogenative Homocouplings of Tribromomethyl-Substituted Arenes
Sun, Qiang,Yu, Xin,Bao, Meiling,Liu, Mengxi,Pan, Jinliang,Zha, Zeqi,Cai, Liangliang,Ma, Honghong,Yuan, Chunxue,Qiu, Xiaohui,Xu, Wei
supporting information, p. 4035 - 4038 (2018/03/21)
On-surface synthesis shows significant potential in constructing novel nanostructures/nanomaterials, which has been intensely studied in recent years. The formation of acetylenic scaffolds provides an important route to the fabrication of emerging carbon nanostructures, including carbyne, graphyne, and graphdiyne, which feature chemically vulnerable sp-hybridized carbon atoms. Herein, we designed and synthesized a tribromomethyl-substituted compound. By using a combination of high-resolution scanning tunneling microscopy, non-contact atomic force microscopy, and density functional theory calculations, we demonstrated that it is feasible to convert these compounds directly into C?C triple-bonded structural motifs by on-surface dehalogenative homocoupling reactions. Concurrently, sp3-hybridized carbon atoms are converted into sp-hybridized ones, that is, an alkyl group is transformed into an alkynyl moiety. Moreover, we achieved the formation of dimer structures, one-dimensional molecular wires, and two-dimensional molecular networks on Au(111) surfaces, which should inspire further studies towards two-dimensional graphyne structures.
Catalytic halodefluorination of aliphatic carbon-fluorine bonds
Goh, Kelvin K.K.,Sinha, Arup,Fraser, Craig,Young, Rowan D.
, p. 42708 - 42712 (2016/05/19)
A variety of halosilanes, in conjunction with aluminum catalysts, convert fluorocarbons into higher halocarbons. Bromination and iodination of fluorocarbons are more effective than chlorination in terms of yield and activity. The mechanism for the reaction is investigated utilizing experimental and computational evidence and preliminary results suggest an alternate mechanism to that reported for the related hydrodefluorination reaction.
