scholarly journals Structure Determination: Structural Determination of Ordered Porous Solids by Electron Crystallography (Adv. Funct. Mater. 2/2014)

2014 ◽  
Vol 24 (2) ◽  
pp. 173-173 ◽  
Author(s):  
Tom Willhammar ◽  
Yifeng Yun ◽  
Xiaodong Zou
Keyword(s):  
Structure Determination ◽  
Porous Solids ◽  
Structural Determination ◽  
Electron Crystallography ◽  
Ordered Porous

Structural Determination of a Metastable Ag27 Nanocluster and Its Transformations into Ag8 and Ag29 Nanoclusters

2021 ◽  
Author(s):  
Chen Zhu ◽  
Tenfei Duan ◽  
Hao Li ◽  
Xiao Wei ◽  
Xi Kang ◽  
...  
Keyword(s):  
Structure Determination ◽  
Structural Determination ◽  
To Receive

Research on nanocluster transformation has generally focused on stable nanoclusters, while analysis on structure evolutions of metastable nanoclusters just began to receive attention recently. Herein, we reported the structure determination...

Electron crystallography applied to the structure determination of Nb(Cu,Al,X)2Laves phases

2006 ◽  
Vol 223 (3) ◽  
pp. 253-255
Author(s):  
M. GIGLA ◽  
J. LELA̧TKO ◽  
M. KRZELOWSKI ◽  
H. MORAWIEC
Keyword(s):  
Structure Determination ◽  
Electron Crystallography

scholarly journals Double-Helix Supramolecular Nanofibers Assembled from Negatively Curved Nanographenes

2020 ◽  
Author(s):  
Kenta Kato ◽  
Kiyofumi Takaba ◽  
Saori Maki-Yonekura ◽  
Nobuhiko Mitoma ◽  
Yusuke Nakanishi ◽  
...  
Keyword(s):  
Self Assembly ◽  
Negative Curvature ◽  
Double Helix ◽  
Three Dimensional ◽  
Structural Determination ◽  
Dimensional Electron ◽  
Electron Crystallography ◽  
One Dimensional ◽  
Negatively Curved

The layered structures of graphite and related nanographene molecules play key roles in their physical and electronic functions. However, the stacking modes of negatively curved nanographenes remains unclear, owing to the lack of suitable nanographene molecules. Herein we report the synthesis and one-dimensional supramolecular self-assembly of negatively curved nanographenes without any assembly-assisting substituents. This curved nanographene self-assembles in various organic solvents and acts as an efficient gelator. The formation of nanofibers was confirmed by microscopic measurements, and an unprecedented double-helix assembly by continuous π-π stacking was uncovered by three-dimensional electron crystallography. This work not only reports the discovery of an all-sp<sup>2</sup>-carbon supramolecular π-organogelator with negative curvature, but also demonstrates the power of three-dimensional electron crystallography for the structural determination of submicrometer-sized molecular alignment.

scholarly journals Structure determination of the zeolite IM-5 using electron crystallography

2010 ◽  
Vol 225 (2-3) ◽  
Author(s):  
Junliang Sun ◽  
Zhanbing He ◽  
Sven Hovmöller ◽  
Xiaodong Zou ◽  
Fabian Gramm ◽  
...  
Keyword(s):  
Structure Determination ◽  
Electron Crystallography

Structure of Membrane Proteins Revealed by Electron Crystallography

2000 ◽  
Vol 6 (S2) ◽  
pp. 234-235
Author(s):  
K. Mitsuoka
Keyword(s):  
Membrane Proteins ◽  
Structure Determination ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
Electron Crystallography ◽  
Aquaporin 1 ◽  
Diffraction Patterns ◽  
2D Crystals

Because membrane proteins are localized in a continuous lipid bilayer in the native environment, the situation of membrane proteins in the two-dimensional (2D) crystals is quite similar to the environment in vivo. Thus, electron crystallography using 2D crystals is one of the suitable techniques for structure determination of membrane proteins at atomic or near-atomic resolution. Here we describe the structures of the two membrane proteins, bacteriorhodopsin and aquaporin-1, which were solved by electron crystallography at 2.5 and 4.0 Å resolution, respectively.Bacteriorhodopsin (bR) is a light-driven proton pump found in Halobacterium salinarium. The atomic model of the protein was first proposed by electron crystallography and we improved the resolution of the structure determination up to 3.0 Å by collecting 366 electron diffraction patterns and 129 images. The resulted map showed not only a bR molecule but also eight surrounding lipids in the asymmetric unit.

Metallkomplexe mit funktionalisierten Schwefelliganden, V Ruthenium(II)-Alkyl- und -Arylthiosulfinato-Komplexe. Kristallstrukturanalyse von CpRu(PPh3)(CO)[S-S(O)-CH2-C6H5] / Metal Complexes of Functionalized Sulfur Containing Ligands, V Ruthenium(II)-Alkyl-and -Arylthiosulfinato Complexes. X-Ray Structure Determination of CpRu(PPh3)(CO)[S-S(O)-CH2-C6H5]

1993 ◽  
Vol 48 (5) ◽  
pp. 627-635 ◽  
Author(s):  
Wolfgang Weigand ◽  
Gabriele Bosl ◽  
Christian Robl ◽  
Jürgen Kroner
Keyword(s):  
Bond Length ◽  
Structure Determination ◽  
Spectroscopic Data ◽  
Structural Determination ◽  
Chiral Complexes ◽  
X Ray ◽  
Extended Hückel Calculations ◽  
Sulfur Containing ◽  
Sulfur Bond

Compounds of the type CpRu(PPh3)(L)(SH) [L = PPh3 (2), CO (4)] react with N-alkyl and -arylsulfinyl phthalimides 3a-f to give the chiral complexes CpRu(PPh3)(L)[S-S(O)-R] (L = PPh3, 5a: R = C4H9,5b: R = C12H25,5d: R = C18H37,5e: R = Tol; L = CO, 6a: R = C4H9,6b: R = C12H25,6c: R = C16H33,6d: R = C18H37,6f: R = CH2Ph). With 6a-c diastereoselectivities of 5:2, with 6d 5:1, and with 6f 10:3, respectively, are observed. The compounds 5,6 are characterized by their spectroscopic data; the X-ray structural determination of u-6f shows a sulfur-sulfur bond length of 208,6 (3) pm, the dihedral angle Ru-S(1)-S(2)-C(25) is 170,8°. Extended Hückel calculations give information about the rotational barrier around the S-S(O) axis.

Structural Determination of the InSb(110) Surface by the Automated Tensor LEED Program

1998 ◽  
Vol 05 (01) ◽  
pp. 241-247 ◽  
Author(s):  
E. A. Soares ◽  
V. E. De Carvalho ◽  
C. M. C. De Castilho
Keyword(s):  
Surface Structure ◽  
Debye Temperature ◽  
Structure Determination ◽  
Structural Determination

The InSb(110) surface structure has been re-examined using the tensor LEED approach. A refinement of the structure as well as the influence of the Debye temperature on the structure determination is presented.

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