scholarly journals Detection of alkali metal ions in DNA crystals using state-of-the-art X-ray diffraction experiments

2001 ◽  
Vol 29 (5) ◽  
pp. 1208-1215 ◽  
Author(s):  
V. Tereshko
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
State Of The Art ◽  
Alkali Metal Ions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dna Crystals

The influence of alkali-metal ions on the molecular and supramolecular structure of manganese(II) complexes with tetrachlorophthalate ligands

2015 ◽  
Vol 70 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Hong-Dan Wang ◽  
Ming-Yang He ◽  
Qun Chen ◽  
Sheng-Chun Chen
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Supramolecular Structure ◽  
Critical Role ◽  
Alkali Metal Ions ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Space Groups ◽  
Dinuclear Structure

AbstractIn our efforts to investigate the influence of alkali-metal ions on the formation of metal complexes with polyhalogen-substituted benzenedicarboxylates, two manganese(II) complexes of tetrachlorophthalic acid (1,2-H2BDC-Cl4), [Mn2(1,2-BDC-Cl4)2(H2O)9]·H2O (1) and [MnK2(1,2-BDC-Cl4)2(H2O)4]n (2), were synthesized and structurally characterized. Single-crystal X-ray diffraction studies have revealed that complexes 1 and 2 crystallize in space groups P1̅ and Pbcn, respectively. Complex 1 shows a discrete dinuclear structure, while complex 2 features a two-dimensional heterometallic framework containing rare Mn–O–K linkages. The results clearly suggest that the introduction of alkali metal ions does play a critical role in the construction of complexes 1 and 2 with distinct dimensionality and connectivity. Their spectroscopic, thermal, and fluorescence properties have also been studied briefly.

scholarly journals Alkali Metal Intercalation in Curved Carbon Networks: X-Ray Structural Studies

2014 ◽  
Vol 70 (a1) ◽  
pp. C986-C986
Author(s):  
Natalie Sumner ◽  
Sarah Spisak ◽  
Alexander Zabula ◽  
Alexander Filatov ◽  
Andrey Rogachev ◽  
...  
Keyword(s):  
Energy Storage ◽  
Alkali Metal ◽  
Metal Ions ◽  
Anode Materials ◽  
Materials Science ◽  
Polyaromatic Hydrocarbons ◽  
Earth Metal ◽  
Alkali Metal Ions ◽  
X Ray ◽  
Carbon Networks

The intercalation of alkali metal ions into carbon-based aromatic systems is of great interest in materials science due to the increased need for stable anode materials with high capacity of energy storage. Currently, graphite, a sp2-hybirdized carbon network, is the key anode component in rechargeable Li-ion batteries. Carbon allotropes with nonplanar π-surfaces, ranging from fullerenes to nanotubes, are now under investigation as prospective anode materials. The curved carbon networks of fullerenes and nanotubes are often modeled by open bowl-shaped polyaromatic hydrocarbons, such as the smallest curved fullerene fragment, corannulene (C20H10). One of the most fascinating properties of such bowl-shaped polyarenes and fullerenes is their ability to reversibly uptake and delocalize extra electrons upon multi-electron reduction without significant rearrangement and deformation of their carbon framework [1,2]. Notably, the anode material fabricated from corannulene shows a high reversible lithium capacity (602 mAh/g). This is almost twice as high as the theoretical capacity of the commonly used fully lithiated planar graphite material (LiC6, 372 mAh/g). In our work, we target the X-ray structural elucidation of metal intercalation patterns of carbon-rich curved polyarenes with light alkali metal ions, such as Li and Na, and compare those with extended planar polyaromatic systems. Recently, we expanded this study to the light alkaline earth metal, Mg, as its atomic radius is very close to that of Li. In addition, magnesium is cost effective and abundant, and thus presents great interest in the emerging energy storage technologies.

Single crystal X-ray structure of Lawsone anion: Evidence for coordination of alkali metal ions and formation of naphthosemiquinone radical in basic media

2012 ◽  
Vol 1010 ◽  
pp. 38-45 ◽  
Author(s):  
Sunita Salunke-Gawali ◽  
Laxmi Kathawate ◽  
Yogesh Shinde ◽  
Vedavati G. Puranik ◽  
Thomas Weyhermüller
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Single Crystal ◽  
Alkali Metal Ions ◽  
X Ray

Revisiting the High-Pressure Properties of the Metal-Organic Frameworks ZIF-8 and ZIF-67

2020 ◽  
Author(s):  
Pia Vervoorts ◽  
Stefan Burger ◽  
Karina Hemmer ◽  
Gregor Kieslich
Keyword(s):  
High Pressure ◽  
State Of The Art ◽  
Energy Landscape ◽  
Structural Flexibility ◽  
Zeolitic Imidazolate Frameworks ◽  
Stimuli Responsive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Open Questions ◽  
Metal Organic

The zeolitic imidazolate frameworks ZIF-8 and ZIF-67 harbour a series of fascinating stimuli responsive properties. Looking at their responsitivity to hydrostatic pressure as stimulus, open questions exist regarding the isotropic compression with non-penetrating pressure transmitting media. By applying a state-of-the-art high-pressure powder X-ray diffraction setup, we revisit the high-pressure behaviour of ZIF-8 and ZIF-67 up to <i>p</i> = 0.4 GPa in small pressure increments. We observe a drastic, reversible change of high-pressure powder X-ray diffraction data at <i>p</i> = 0.3 GPa, discovering large volume structural flexibility in ZIF-8 and ZIF-67. Our results imply a shallow underlying energy landscape in ZIF-8 and ZIF-67, an observation that might point at rich polymorphism of ZIF-8 and ZIF-67, similar to ZIF-4(Zn).<br>

Revisiting the High-Pressure Properties of the Metal-Organic Frameworks ZIF-8 and ZIF-67

2020 ◽  
Author(s):  
Pia Vervoorts ◽  
Stefan Burger ◽  
Karina Hemmer ◽  
Gregor Kieslich
Keyword(s):  
High Pressure ◽  
State Of The Art ◽  
Energy Landscape ◽  
Structural Flexibility ◽  
Zeolitic Imidazolate Frameworks ◽  
Stimuli Responsive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Open Questions ◽  
Metal Organic

The zeolitic imidazolate frameworks ZIF-8 and ZIF-67 harbour a series of fascinating stimuli responsive properties. Looking at their responsitivity to hydrostatic pressure as stimulus, open questions exist regarding the isotropic compression with non-penetrating pressure transmitting media. By applying a state-of-the-art high-pressure powder X-ray diffraction setup, we revisit the high-pressure behaviour of ZIF-8 and ZIF-67 up to <i>p</i> = 0.4 GPa in small pressure increments. We observe a drastic, reversible change of high-pressure powder X-ray diffraction data at <i>p</i> = 0.3 GPa, discovering large volume structural flexibility in ZIF-8 and ZIF-67. Our results imply a shallow underlying energy landscape in ZIF-8 and ZIF-67, an observation that might point at rich polymorphism of ZIF-8 and ZIF-67, similar to ZIF-4(Zn).<br>

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