Syntheses, X-ray crystal structures, and emission properties of diprotonated tetrapyridylpyrazine and triprotonated terpyridine

2015 ◽  
Vol 29 (6) ◽  
pp. 269-275 ◽  
Author(s):  
Naokazu Yoshikawa ◽  
Shinichi Yamabe ◽  
Nobuko Kanehisa ◽  
Tsuyoshi Inoue ◽  
Hiroshi Takashima
Keyword(s):  
Crystal Structures ◽  
X Ray ◽  
Emission Properties

Syntheses, X-ray crystal structures, and emission properties of protonated tripyridyltriazines and their ruthenium(II) complexes

2017 ◽  
Vol 31 (3) ◽  
pp. e3777 ◽  
Author(s):  
Naokazu Yoshikawa ◽  
Shoko Yamazaki ◽  
Hiroko Kimura ◽  
Nobuko Kanehisa ◽  
Tsuyoshi Inoue ◽  
...  
Keyword(s):  
Crystal Structures ◽  
X Ray ◽  
Emission Properties

Syntheses, X-Ray Crystal Structures, Emission Properties and DFT Calculations of Monoprotonated Polypyridines

2019 ◽  
Vol 4 (1) ◽  
pp. 59-65
Author(s):  
Naokazu Yoshikawa ◽  
Shoko Yamazaki ◽  
Natsumi Kato ◽  
Akari Kubota ◽  
Mika Sawai ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Crystal Structures ◽  
X Ray ◽  
Emission Properties

Silver complexes stabilized by large silanethiolate ligands – crystal structures and luminescence properties

2017 ◽  
Vol 46 (33) ◽  
pp. 11097-11107 ◽  
Author(s):  
Anna Ciborska ◽  
Zbigniew Hnatejko ◽  
Katarzyna Kazimierczuk ◽  
Agnieszka Mielcarek ◽  
Aleksandra Wiśniewska ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Luminescence Properties ◽  
Silver Complexes ◽  
X Ray ◽  
Emission Properties

Emission properties of silanethiolates Ag(SR)2− and Ag3(SR)3 are discussed with reference to their molecular (X-ray) and electronic (DFT) structures.

Syntheses, characterization, X-ray crystal structures and emission properties of five oxovanadium(V) complexes with pyridyl/pyrimidyl–pyrazole derived ditopic ligands

Polyhedron ◽  
2011 ◽  
Vol 30 (9) ◽  
pp. 1595-1603 ◽  
Author(s):  
Tarak Nath Mandal ◽  
Somnath Roy ◽  
Samik Gupta ◽  
Bijan Kumar Paul ◽  
Ray J. Butcher ◽  
...  
Keyword(s):  
Crystal Structures ◽  
X Ray ◽  
Emission Properties

Transmission electron microscope studies in special ceramics

1978 ◽  
Vol 36 (1) ◽  
pp. 268-269
Author(s):  
A. Zangvil ◽  
L.J. Gauckler ◽  
G. Schneider ◽  
M. Rühle
Keyword(s):  
Phase Diagrams ◽  
Crystal Structures ◽  
Thin Foil ◽  
Limited Extent ◽  
Complex Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Electron Microscopes ◽  
Lattice Resolution

The use of high temperature special ceramics which are usually complex materials based on oxides, nitrides, carbides and borides of silicon and aluminum, is critically dependent on their thermomechanical and other physical properties. The investigations of the phase diagrams, crystal structures and microstructural features are essential for better understanding of the macro-properties. Phase diagrams and crystal structures have been studied mainly by X-ray diffraction (XRD). Transmission electron microscopy (TEM) has contributed to this field to a very limited extent; it has been used more extensively in the study of microstructure, phase transformations and lattice defects. Often only TEM can give solutions to numerous problems in the above fields, since the various phases exist in extremely fine grains and subgrain structures; single crystals of appreciable size are often not available. Examples with some of our experimental results from two multicomponent systems are presented here. The standard ion thinning technique was used for the preparation of thin foil samples, which were then investigated with JEOL 200A and Siemens ELMISKOP 102 (for the lattice resolution work) electron microscopes.

Crystal Structures of Fragments D and Double-D from Fibrinogen and Fibrin

1999 ◽  
Vol 82 (08) ◽  
pp. 271-276 ◽  
Author(s):  
Glen Spraggon ◽  
Stephen Everse ◽  
Russell Doolittle
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Crystal Structures ◽  
Structure And Function ◽  
X Ray ◽  
Long Period ◽  
And Function

IntroductionAfter a long period of anticipation,1 the last two years have witnessed the first high-resolution x-ray structures of fragments from fibrinogen and fibrin.2-7 The results confirmed many aspects of fibrinogen structure and function that had previously been inferred from electron microscopy and biochemistry and revealed some unexpected features. Several matters have remained stubbornly unsettled, however, and much more work remains to be done. Here, we review several of the most significant findings that have accompanied the new x-ray structures and discuss some of the problems of the fibrinogen-fibrin conversion that remain unresolved. * Abbreviations: GPR—Gly-Pro-Arg-derivatives; GPRPam—Gly-Pro-Arg-Pro-amide; GHRPam—Gly-His-Arg-Pro-amide

Synthesis of Sulfoquinovose and Sulfoquinovosyl Diacylglycerides, and a Fluorogenic Substrate for Sulfoquinovosidases

2019 ◽  
Author(s):  
Yunyang Zhang ◽  
Janice Mui ◽  
Thimali Arumaperuma ◽  
James P. Lingford ◽  
ETHAN GODDARD-BORGER ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Fluorogenic Substrate ◽  
Potassium Salts ◽  
X Ray ◽  
Sulfoquinovosyl Diacylglycerol ◽  
Sodium And Potassium

<p>The sulfolipid sulfoquinovosyl diacylglycerol (SQDG) and its headgroup, the sulfosugar sulfoquinovose (SQ), are estimated to harbour up to half of all organosulfur in the biosphere. SQ is liberated from SQDG and related glycosides by the action of sulfoquinovosidases (SQases). We report a 10-step synthesis of SQDG that we apply to the preparation of saturated and unsaturated lipoforms. We also report an expeditious synthesis of SQ and (<sup>13</sup>C<sub>6</sub>)SQ, and X-ray crystal structures of sodium and potassium salts of SQ. Finally, we report the synthesis of a fluorogenic SQase substrate, methylumbelliferyl a-D-sulfoquinovoside, and examination of its cleavage kinetics by two recombinant SQases.</p>

Sign in / Sign up

Export Citation Format

Share Document