Insight into structural and π–magnesium bonding characteristics of the X2Mg⋯Y (X = H, F; Y = C2H2, C2H4and C6H6) complexes

Li, Siyi; Wu, Di; Li, Ying; Yu, Dan; Liu, Jiayuan; Li, Zhi‐Ru

doi:10.1039/c6ra23368f

Cited by 235 publications

(352 citation statements)

References 40 publications

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“…Furthermore, it is well known that some alloying elements (such as Sr and P) can affect crystal morphology, and have been specifically shown to change the morphology of Mg 2 Si. 2,13,14) However, in the present study, Cu addition does not cause a transition from faceted behavior to nonfaceted. Previous literature has also reported that pure Al, pure Si and pure Mg were used as raw materials to prepare Al-Mg 2 Si alloys.…”

Section: Non-faceted and Faceted Growth Of Primary Mg 2 Sicontrasting

confidence: 40%

The Formation and Characterization of the Primary Mg2Si Dendritic Phase in Hypereutectic Al-Mg2Si Alloys

Qin

Li²

2016

Mater. Trans.

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The formation of a primary Mg 2 Si dendritic phase in hypereutectic Al-Mg 2 Si alloys is investigated using melt-spinning techniques. The results indicate that, at the initial stage, the primary Mg 2 Si crystal rapidly grows in a non-faceted manner, forming a smooth dendritic or fluted structure. As the undercooling of the process is varied, the growth behavior transitions from non-faceted to faceted. Subsequently, Mg 2 Si crystals grow preferentially along the [100] direction producing growth hillocks and forming stable branches. The morphology of the primary Mg 2 Si crystal exhibits angular facets. Furthermore, if V ½100 =V ½111 ¼ ffiffi ffi 3 p , the crystal grows as a perfect octahedral dendrite (the dendrite is composed of octahedrons), and if V ½100 =V ½111 < ffiffi ffi 3 p , the crystal grows with imperfect octahedral subunits. Lastly, the growth process of the primary Mg 2 Si dendrites is discussed.

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Section: Non-faceted and Faceted Growth Of Primary Mg 2 Sicontrasting

confidence: 40%

The Formation and Characterization of the Primary Mg2Si Dendritic Phase in Hypereutectic Al-Mg2Si Alloys

Qin

Li²

2016

Mater. Trans.

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“…However, so far, the distinct three stages of the current oscillation or voltage oscillation have not been elucidated via the field-assisted dissolution and the 'plastic flow' models. [7][8][9][12][13][14][15][16][17][18] For example, the increase of current in Figure 8d and the drop of voltage (decrease of current efficiency) in Figure 8e are both controversial. 18,30 Diggle et al 30 indicated that the mechanism of oxide dissolution is chemical in nature.…”

Section: Resultsmentioning

confidence: 99%

“…[4][5][6] Several interesting mechanisms of ATNTs have been reported in many famous journals in recent years. [4][5][6][7][8][9][10] The general accepted mechanism is a field-assisted dissolution (or fluoride effect ([TiF 6 ] 2− )) process for the pore formation in anodic titania films, [8][9][10] similar to that in porous anodic alumina (PAA) films, [11][12][13] despite a lack of direct experimental evidence to confirm this expectation.…”

mentioning

confidence: 93%

Formation Mechanism of Gaps and Ribs Around Anodic TiO₂Nanotubes and Method to Avoid Formation of Ribs

Chong

Gao

et al. 2015

J. Electrochem. Soc.

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Anodic TiO 2 nanotubes (ATNTs) have been studied extensively for many years. However, their mysterious formation mechanism still remains unclear. The formation of gaps and ribs around the nanotubes has not been elucidated. Here, various surface and cross-section morphologies of ATNTs obtained under different anodizing conditions and their evolution process have been investigated in detail. Based on many experimental facts, new explanations for the gaps and ribs are presented. An entire surface layer covered on the nanotubes plays a primary role on the formation of gaps and ribs. The gaps result from the radial distribution of the electric field at the pore bottom. No newly-formed oxide will exist along the gap direction, because the electric filed along the gap is the minimum. The ribs result from the electrolyte entering into the wider gaps among the ATNTs due to the rupture of the entire surface layer. The rings or ribs on the outer wall of ATNTs are formed at the electrolyte/Ti interface due to the discontinuous existence of a small amount of electrolyte within the gap base. The present viewpoint was demonstrated by an original micro-dam, which can block the electrolyte entering into the gaps and avoid the formation of ribs.

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“…4. As previously reported, the sulphur-containing aliphatic carboxylic acids form well-organized monolayers on the bare gold electrode [34,62]. Most probably, such a structure ensures easier migration of reactants through the alkane chains to the electrode surface.…”

Section: Resultsmentioning

confidence: 56%

New self-assembled layers composed with gold nanoparticles, cysteamine and dihydrolipoic acid deposited on bare gold template for highly sensitive and selective simultaneous sensing of dopamine in the presence of interfering ascorbic and uric acids

Łuczak

Osińska

2016

J Solid State Electrochem

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A gold bare template modified with self-assembled layers (SAMs) composed of gold nanoparticles and organic Scontaining compound: cysteamine and dihydrolipoic acid were prepared. The electrode with SAMs endowed with gold nanoparticles gave a high catalytic effect for dopamine electrooxidation alone and in the presence of biogenic interfering compounds: ascorbic acid and uric acid in solution at pH 7. For this novel sensor, a linear relationship between the current response of dopamine at the potential of peak maximum (j p ) and the concentration of this compound in solution (c DA ) was found over the range 0.1 μM to 0.85 mM with the detection limit of 0.023 μM.

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Insight into structural and π–magnesium bonding characteristics of the X₂Mg⋯Y (X = H, F; Y = C₂H₂, C₂H₄and C₆H₆) complexes

Abstract: Quantum chemical calculations have been performed to study the nature of interaction of complexes formed by MgX2(X = H, F) molecules with acetylene, ethylene, and benzene.

Cited by 235 publications

References 40 publications

The Formation and Characterization of the Primary Mg<sub>2</sub>Si Dendritic Phase in Hypereutectic Al-Mg<sub>2</sub>Si Alloys

The Formation and Characterization of the Primary Mg<sub>2</sub>Si Dendritic Phase in Hypereutectic Al-Mg<sub>2</sub>Si Alloys

Formation Mechanism of Gaps and Ribs Around Anodic TiO₂Nanotubes and Method to Avoid Formation of Ribs

New self-assembled layers composed with gold nanoparticles, cysteamine and dihydrolipoic acid deposited on bare gold template for highly sensitive and selective simultaneous sensing of dopamine in the presence of interfering ascorbic and uric acids

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Insight into structural and π–magnesium bonding characteristics of the X2Mg⋯Y (X = H, F; Y = C2H2, C2H4and C6H6) complexes

Abstract: Quantum chemical calculations have been performed to study the nature of interaction of complexes formed by MgX2(X = H, F) molecules with acetylene, ethylene, and benzene.

Cited by 235 publications

References 40 publications

The Formation and Characterization of the Primary Mg<sub>2</sub>Si Dendritic Phase in Hypereutectic Al-Mg<sub>2</sub>Si Alloys

The Formation and Characterization of the Primary Mg<sub>2</sub>Si Dendritic Phase in Hypereutectic Al-Mg<sub>2</sub>Si Alloys

Formation Mechanism of Gaps and Ribs Around Anodic TiO2Nanotubes and Method to Avoid Formation of Ribs

New self-assembled layers composed with gold nanoparticles, cysteamine and dihydrolipoic acid deposited on bare gold template for highly sensitive and selective simultaneous sensing of dopamine in the presence of interfering ascorbic and uric acids

Contact Info

Product

Resources

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Insight into structural and π–magnesium bonding characteristics of the X₂Mg⋯Y (X = H, F; Y = C₂H₂, C₂H₄and C₆H₆) complexes

Formation Mechanism of Gaps and Ribs Around Anodic TiO₂Nanotubes and Method to Avoid Formation of Ribs