Peculiar intensity distribution in the Raman spectra of copper organoacetylides

Garbuzova, I. A.; Gol'ding, I. R.; Schegolikhin, A. N.

doi:10.1002/jrs.1250260602

Cited by 10 publications

(11 citation statements)

References 10 publications

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“…Upon heating (at 100 °C for 2 h), a shoulder appears at ca . 460 nm which can be attributed to a charge transfer transition . The intensity of this absorption notably increased in the presence of morpholine, acting as a base, in relation to the SPR band, preserving the solution a red‐orange color, in clear contrast with the behavior of phenylethynylcopper(I) in the presence of morpholine.…”

Section: Resultsmentioning

confidence: 99%

Making Copper(0) Nanoparticles in Glycerol: A Straightforward Synthesis for a Multipurpose Catalyst

et al. 2017

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Dedicatedt ot he Laboratoire HØtØrochimieF ondamentale et AppliquØeo nt he occasiono fi ts 50 th anniversary.Supporting information for this article is availableunder https://doi.org/10.1002/adsc.201700535.Abstract: Small zero-valent copper nanoparticles (CuNPs) have been straightforwardly preparedf rom Cu(I) andC u(II) precursors in glycerol andi nt he presence of polyvinylpyrrolidone as stabilizer. Thanks to the negligible vaporp ressure of the solvent, these original nano-systems could be directly characterized in glycerol as well as in the solids tate, exhibiting relevantly homogeneous colloidal dispersions,a lso evena fter catalysis. CuNPs coming from the well-defined coordinationc omplex di-m-hydroxobis[(N,N,N',N'-tetramethylethylenediamine)copper(II)] chloride {[Cu(k 2 -N,N-TMEDA)(m-OH)] 2 Cl 2 } have been highly efficient in C-C andC -heteroatom bond formation processes. This newc atalytic system has proved its performance in C-Nc ouplings and in the synthesis of differently substitutedp ropargylic amines throughc ross-dehydrogenative couplings, multi-component reactions such as A 3 (aldehydealkyne-amine) and KA 2 (ketone-alkyne-amine) couplings,a sw ell as in the formationo fh eterocycles such as benzofurans,i ndolizines,a nd quinolines under smoothc onditions.N os ignificant copper amount was detected in the extracted organic compounds from the catalytic phase by inductively coupled plasma-atomic emission spectroscopic (ICP-AES)analyses,p roving ah ighly efficient immobilization of copper nanoparticles in glycerol. From am echanisticp oint of view,s pectroscopic data (infrareda nd ultraviolet-visible spectra) agreew ith asurface-like catalytic reactivity.

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Section: Resultsmentioning

confidence: 99%

Making Copper(0) Nanoparticles in Glycerol: A Straightforward Synthesis for a Multipurpose Catalyst

et al. 2017

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“…The Cu‐acetylide in the first step is considered as the key intermediates for the second step, however its kinetic activity will be sharply declined once being solidified. [ 19,21 ] Then, to reveal the factors which impact the formation and activity of Cu‐acetylide on the Cu substrate is essential to understand the primary reasons interrupting the ordered growth of GDY nanofilm.…”

Section: Methodsmentioning

confidence: 99%

Spontaneously Splitting Copper Nanowires into Quantum Dots on Graphdiyne for Suppressing Lithium Dendrites

Zuo

Wang

et al. 2020

Advanced Materials

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Because the homocoupling reaction follows a multistep route, the conversion of the precursor with six terminal alkynes (hexaethynylbenzene, HEB) to GDY nanosheet is speculated to be complicated. It has been reported that the Cu elements, including the Cu (I) ions, Cu (II) ions, and Cu (0) clusters, [18-20] are the potential reactants which can chemically interact with the terminal alkynes under alkaline condition. More complicated, the growth of GDY on the Cu substrates is a new twophase (solid-liquid) inhomogeneous reaction, rather than a homogenous reaction in solution. Thus, to simplify this study here, the growth of GDY is mainly divided into two steps: I) the formation of the Cu-acetylide intermediates and II) their subsequent cross coupling reaction. The Cu-acetylide in the first step is considered as the key intermediates for the second step, however its kinetic activity will be sharply declined once being solidified. [19,21] Then, to reveal the factors which impact the formation and activity of Cu-acetylide on the Cu substrate is essential to understand the primary reasons interrupting the ordered growth of GDY nanofilm. Herein, we analyzed and investigated the influence of the crystal structure in the growth of GDY. We find that the crystal boundary is the origin of the reaction activity, affecting the formation of intermediate Cu-acetylide, thus the GDY nanosheets are able to split polycrystalline CuNWs (P-CuNW) into Cu quantum dots (CuQD, about 3 nm) in the growth process. The large number of CuQDs is one of the main reasons for blocking the ordered growth of GDY. The CuQDs well dispersed on the GDY are the ideal substrates for uniform lithium plating and can efficiently suppress lithium dendrites in lithium metal batteries. Based on this interesting reaction phenomenon, a new method can be developed for the one-step preparation of CuQDs simultaneously anchored on GDY, and many promising applications of CuQDs can be explored. Our previous report mentioned an interesting phenomenon that the growth of GDY nanosheets can chemically etch the Cu substrates. [14] To further reveal the reasons for this phenomenon, it is crucial to study the relationship between the crystal structure of the Cu and the growth of GDY (Scheme S1, Supporting Information). It is very interesting if this unique growth phenomenon of GDY can be used to prepare smallsized Cu nanoparticles simultaneously anchoring on the GDY nanosheets (Scheme 1a). Up to now, the graphene preparation using different Cu substrates has already provided us some valuable inspirations. [22,23] For easily finding out the influence

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“…We first prepared the monomeric ( 27 , 28 ) copper complex 1 Cu a (figs. S7 and S8) by reacting lithium phenylacetylide with (CAAC)CuOAc (figs.…”

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confidence: 99%

Isolation of bis(copper) key intermediates in Cu-catalyzed azide-alkyne “click reaction”

et al. 2015

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Peculiar intensity distribution in the Raman spectra of copper organoacetylides

Cited by 10 publications

References 10 publications

Making Copper(0) Nanoparticles in Glycerol: A Straightforward Synthesis for a Multipurpose Catalyst

Making Copper(0) Nanoparticles in Glycerol: A Straightforward Synthesis for a Multipurpose Catalyst

Spontaneously Splitting Copper Nanowires into Quantum Dots on Graphdiyne for Suppressing Lithium Dendrites

Isolation of bis(copper) key intermediates in Cu-catalyzed azide-alkyne “click reaction”

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