scholarly journals Towards Molecular-Level Understanding of Electrocatalytic Hydrogenation. A Comparison of Cyclic Voltammetric Behavior of Benzene Adsorption at Pt(111) Single Crystal Electrodes in Aqueous HClO4 and H2SO4

2008 ◽  
Keyword(s):  
Single Crystal ◽  
Molecular Level ◽  
Benzene Adsorption ◽  
Electrocatalytic Hydrogenation ◽  
Cyclic Voltammetric ◽  
Voltammetric Behavior

Cyclic Voltammetric Behavior and Some Surface Characteristics of the Lead Electrode in Aqueous NaI Solutions

1992 ◽  
Vol 65 (6) ◽  
pp. 1608-1616 ◽  
Author(s):  
A. Mohamed Abd El-Halim ◽  
Mohamed Hossam Fawzy ◽  
Sayed Sabet Abd El Rehim ◽  
Abd El Kader Saty
Keyword(s):  
Surface Characteristics ◽  
Cyclic Voltammetric ◽  
Lead Electrode ◽  
Voltammetric Behavior

scholarly journals Direct evidence for 2-fold to 3-fold change of interpenetration in a MOF

2014 ◽  
Vol 70 (a1) ◽  
pp. C636-C636
Author(s):  
Himanshu Aggarwal ◽  
Prashant Bhatt ◽  
Charl Benzuidenhout ◽  
Leonard Barbour
Keyword(s):  
Single Crystal ◽  
Crystal Engineering ◽  
Molecular Level ◽  
Metal Organic Framework ◽  
Structural Rearrangement ◽  
Structure Property ◽  
Ambient Conditions ◽  
Physical Conditions ◽  
Structure Property Relationships ◽  
Metal Organic

Single-crystal to single-crystal transformations has recently received much attention in the field of crystal engineering. Such transformations not only provide insight into the changes taking place within the crystal at the molecular level, but they also aid our understanding of the structure-property relationships. Discrete crystals have been shown to tolerate considerable dynamic behavior at the molecular level while maintaining their single-crystal character. Examples that are common in the literature include bond formation/cleavage,[1] guest uptake,[2] release or exchange as well as polymorphic phase transformations. However, there are rare examples of the structural transformations on the host framework initiated by removal of guest or change in physical conditions such as temperature or pressure. We have investigated a known doubly-interpenetrated metal organic framework with the formula [Zn2(ndc)2(bpy)] which possesses minimal porosity when activated. We have shown not only that the material converts to its triply-interpenetrated analogue upon desolvation, but that the transformation occurs in a single-crystal to single-crystal manner under ambient conditions.[3] This contribution probes the limits to which a single-crystal material can undergo structural rearrangement while still maintaining the macroscopic integrity of the crystal as a discrete entity.

scholarly journals Crystal Structure and Cyclic Voltammetric Studies on the Metal Complexes of N-(Dimethylcarbamothioyl)-4-fluorobenzamide

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Gun Binzet ◽  
Ersan Turunc ◽  
Ulrich Flörke ◽  
Nevzat Külcü ◽  
Hakan Arslan
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Analysis Data ◽  
Complex Compounds ◽  
Planar Geometry ◽  
Cyclic Voltammetric ◽  
Bond Lengths ◽  
H Nmr ◽  
Cyclic Voltammetric Studies ◽  
Oxygen Atoms

We synthesized N-(dimethylcarbamothioyl)-4-fluorobenzamide compound and its copper(II) and nickel(II) complexes. The structures of compounds have been characterized by elemental analysis and spectral data (IR, 1H NMR). Furthermore, crystal and molecular structure of the synthesized complexes have been identified by using single crystal X-ray diffraction data. In the complexes formation the metal atom was coordinated via two sulfur atoms and two oxygen atoms. The single crystal structure of copper(II) and nickel(II) complex exhibits slightly distorted square planar geometry. The oxygen atoms are in a cis configuration. It appeared that the lengths of the thiocarbonyl and carbonyl bonds are longer than the average for C=S and C=O; meanwhile the C‐N bonds in the complex ring appeared to be shorter than the average for C‐N single bonds. These data show that C-O, C-S, and C-N bond lengths of the complexes suggest considerable electronic delocalization in the chelate ring. All bond lengths and angles obtained as a result of the analyses are found to be within experimental error limits. The obtained crystal analysis data shows that the structure of complex compounds is compatible with similar compounds in literature. Electrochemical behavior of complexes has been investigated by cyclic voltammetry technique in aprotic media. From the cyclic voltammetric investigation, both of the complexes have demonstrated electroactive properties.

Steric distortion of planar NiP2N2 chromophores: a spectral, cyclic voltammetric and single crystal X-ray structural study

2012 ◽  
Vol 37 (3) ◽  
pp. 265-270 ◽  
Author(s):  
K. Ramalingam ◽  
R. Thiruneelakandan ◽  
G. Bocelli ◽  
L. Righi
Keyword(s):  
Single Crystal ◽  
Structural Study ◽  
Cyclic Voltammetric ◽  
X Ray

scholarly journals Clip-off Chemistry: Synthesis by Programmed Disassembly of Reticular Materials

2021 ◽  
Author(s):  
Yunhui Yang ◽  
Anna Broto-Ribas ◽  
Borja Ortín-Rubio ◽  
Inhar Imaz ◽  
Felipe Gándara ◽  
...  
Keyword(s):  
Single Crystal ◽  
Organic Synthesis ◽  
Molecular Level ◽  
Bond Breaking ◽  
Synthetic Approach ◽  
Synthetic Control ◽  
Chemical Transformations ◽  
Design And Synthesis ◽  
Liquid Phases ◽  
Natural And Synthetic

<p><a>Bond-breaking is an essential process in natural and synthetic chemical transformations. Accordingly, the ability for researchers to strategically dictate which bonds in a given system are broken translates to greater synthetic control, as historically evidenced in fields such as organic synthesis. Here, we report extending the concept of selective bond-breaking to reticular materials, in a new synthetic approach that we call Clip-off Chemistry. We show that bond-breaking in these structures can be controlled at the molecular level; is periodic, quantitative and selective; is effective in reactions performed in either solid or liquid phases</a>; and can occur in a single-crystal-to-single crystal fashion involving the entire bulk precursor sample. Clip-off Chemistry opens the door to programmed disassembly of reticular materials and thus, to the design and synthesis of new molecules and materials.</p><p><br></p><br><div><br></div>

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