scholarly journals Structure of the endoperoxides derived from vitamin D derivatives by dye sensitized photo-oxidation: X-ray crystal structure of 6,19-epidioxy-9,10-seco-5(10),7,22-ergostatrien-3.BETA.-ol benzoate.

1979 ◽  
Vol 27 (8) ◽  
pp. 1949-1950 ◽  
Author(s):  
SACHIKO YAMADA ◽  
KEIKO NAKAYAMA ◽  
HIROAKI TAKAYAMA ◽  
AKIKO ITAI ◽  
YOICHI IITAKA
Keyword(s):  
Crystal Structure ◽  
Vitamin D ◽  
X Ray ◽  
Photo Oxidation ◽  
Dye Sensitized

scholarly journals Single crystal structure and photocatalytic behavior of grafted uranyl on the Zr-node of a pyrene-based metal–organic framework

CrystEngComm ◽  
2020 ◽  
Vol 22 (11) ◽  
pp. 2097-2102 ◽  
Author(s):  
Julia G. Knapp ◽  
Xuan Zhang ◽  
Tatyana Elkin ◽  
Laura E. Wolfsberg ◽  
Sylvia L. Hanna ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Metal Organic Framework ◽  
Uranyl Ion ◽  
Single Crystal Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photo Oxidation ◽  
Metal Organic ◽  
Organic Framework

The zirconium MOF NU-1000 was post-synthetically modified through solvothermal deposition to include the uranyl ion and characterized via single-crystal X-ray diffraction; photo-oxidation was also performed.

Structural and Morphological Studies of Porous ZnO for Dye-Sensitized Solar Cell Applications

2009 ◽  
Vol 293 ◽  
pp. 67-70
Author(s):  
Abdullah Huda ◽  
P.A. Nugroho
Keyword(s):  
Crystal Structure ◽  
Electron Microscope ◽  
Crystal Structure Analysis ◽  
Dye Sensitized Solar Cell ◽  
Random Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Sensitized ◽  
Morphological Studies ◽  
Scanning Electron

Porous nanoflake ZnO has been successfully synthesized via a pyrolitic process of chemical bath deposition (CBD). The latter produced nanoflakes of Zn5(CO3)2(OH)6 as an intermediate product, which transformed to ZnO at 300°C. The microstructure has been investigated by surface morphology observation using a scanning electron microscope (SEM) and crystal-structure analysis using X-ray diffraction (XRD). A random structure of 40nm-thick flakes, grown perpendicularly on the substrate, has been obtained.

scholarly journals Biological activity of the endoperoxides derived from vitamin D derivatives by dye-sensitized photo-oxidation.

1979 ◽  
Vol 25 (5) ◽  
pp. 455-458 ◽  
Author(s):  
Sachiko MORIUCHI ◽  
Fukiko TSURUKI ◽  
Yoko OTAWARA ◽  
Norimasa HOSOYA ◽  
Sachiko YAMADA ◽  
...  
Keyword(s):  
Vitamin D ◽  
Biological Activity ◽  
Photo Oxidation ◽  
Dye Sensitized

A study on α-RuCl3 crystal structure by scanning tunneling microscopy

1989 ◽  
Vol 47 ◽  
pp. 30-31
Author(s):  
H.-J. Cantow ◽  
H. Hillebrecht ◽  
S. Magonov ◽  
H. W. Rotter ◽  
G. Thiele
Keyword(s):  
Crystal Structure ◽  
Density Distribution ◽  
Scanning Tunneling Microscopy ◽  
Electron Density ◽  
Structure Determination ◽  
Electron Density Distribution ◽  
Scanning Tunneling ◽  
Monoclinic Space Group ◽  
Tunneling Microscopy ◽  
X Ray

From X-ray analysis, the conclusions are drawn from averaged molecular informations. Thus, limitations are caused when analyzing systems whose symmetry is reduced due to interatomic interactions. In contrast, scanning tunneling microscopy (STM) directly images atomic scale surface electron density distribution, with a resolution up to fractions of Angstrom units. The crucial point is the correlation between the electron density distribution and the localization of individual atoms, which is reasonable in many cases. Thus, the use of STM images for crystal structure determination may be permitted. We tried to apply RuCl3 - a layered material with semiconductive properties - for such STM studies. From the X-ray analysis it has been assumed that α-form of this compound crystallizes in the monoclinic space group C2/m (AICI3 type). The chlorine atoms form an almost undistorted cubic closed package while Ru occupies 2/3 of the octahedral holes in every second layer building up a plane hexagon net (graphite net). Idealizing the arrangement of the chlorines a hexagonal symmetry would be expected. X-ray structure determination of isotypic compounds e.g. IrBr3 leads only to averaged positions of the metal atoms as there exist extended stacking faults of the metal layers.

X-ray Crystal Structure of ?9-THC-tosylate

Planta Medica ◽  
2008 ◽  
Vol 74 (03) ◽  
Author(s):  
W Gul ◽  
P Carvalho ◽  
D Slade ◽  
M Avery ◽  
JR Duchek ◽  
...  
Keyword(s):  
Crystal Structure ◽  
X Ray

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

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