Copper(I) and Silver(I) Complexes of 1,3-Diphosphacyclobutadiene Sandwich Anions: Synthesis, Crystal Structures, and Solution and Solid-State NMR Spectroscopic Characterization

2013 ◽  
Vol 2014 (10) ◽  
pp. 1638-1651 ◽  
Author(s):  
Jennifer Malberg ◽  
Thomas Wiegand ◽  
Hellmut Eckert ◽  
Michael Bodensteiner ◽  
Robert Wolf
Keyword(s):  
Solid State ◽  
Crystal Structures ◽  
Solid State Nmr ◽  
Spectroscopic Characterization

Gallium-containing Heusler phases ScRh2Ga, ScPd2Ga, TmRh2Ga and LuRh2Ga – magnetic and solid state NMR-spectroscopic characterization

2017 ◽  
Vol 72 (8) ◽  
pp. 609-615
Author(s):  
Lukas Heletta ◽  
Stefan Seidel ◽  
Christopher Benndorf ◽  
Hellmut Eckert ◽  
Rainer Pöttgen
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Spectroscopic Characterization ◽  
Structural Disorder ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Phase Purity ◽  
X Ray ◽  
Arc Melting ◽  
Pauli Paramagnetism

AbstractThe gallium-containing Heusler phases ScRh2Ga, ScPd2Ga, TmRh2Ga and LuRh2Ga have been synthesized by arc-melting of the elements followed by different annealing sequences to improve phase purity. The samples have been studied by powder X-ray diffraction. The structures of Lu0.97Rh2Ga1.03 (Fm3̅m, a=632.94(5) pm, wR2=0.0590, 46 F2 values, seven variables) and Sc0.88Rh2Ga1.12 (a=618.91(4) pm, wR2=0.0284, 44 F2 values, six variables) have been refined from single crystal X-ray diffractometer data. Both gallides show structural disorder through Lu/Ga and Sc/Ga mixing. Temperature dependent magnetic susceptibility measurements showed Pauli paramagnetism for ScRh2Ga, ScPd2Ga, and LuRh2Ga and Curie-Weiss paramagnetism for TmRh2Ga. 45Sc and 71Ga solid state MAS NMR spectroscopic investigations of the Sc containing compounds confirmed the site mixing effects typically observed for Heusler phases. The data indicate that the effect of mixed Sc/Ga occupancy is significantly stronger in ScRh2Ga than in ScPd2Ga.

Syntheses, crystal structures, and solid state NMR investigations of K4M2P6S25 and K3M2P5S18 (M=Ti, Sn)

2002 ◽  
Vol 4 (5) ◽  
pp. 731-745 ◽  
Author(s):  
Volkmar Derstroff ◽  
Wolfgang Tremel ◽  
Guido Regelsky ◽  
Jörn Schmedt auf der Günne ◽  
Hellmut Eckert
Keyword(s):  
Solid State ◽  
Crystal Structures ◽  
Solid State Nmr

Enantiotropically-related polymorphs of {4-(4-chloro-3-fluorophenyl)-2-[4-(methyloxy)phenyl]-1,3-thiazol-5-yl} acetic acid: Crystal structures and multinuclear solid-state NMR

2008 ◽  
Vol 97 (11) ◽  
pp. 4756-4782 ◽  
Author(s):  
Frederick G. Vogt ◽  
Lee M. Katrincic ◽  
Stacey T. Long ◽  
Ronald L. Mueller ◽  
Robert A. Carlton ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Solid State ◽  
Crystal Structures ◽  
Solid State Nmr ◽  
Acid Crystal

Lithium transition metal pnictides – structural chemistry, electrochemistry, and function

2015 ◽  
Vol 35 (1) ◽  
pp. 1-24 ◽  
Author(s):  
Florian Winter ◽  
Rainer Pöttgen ◽  
Magnus Greiwe ◽  
Tom Nilges
Keyword(s):  
Solid State ◽  
Transition Metal ◽  
Crystal Structures ◽  
Chemical Bonding ◽  
Electrochemical Behavior ◽  
Solid State Nmr ◽  
Structural Chemistry ◽  
Covalently Bonded ◽  
Interesting Class ◽  
And Function

AbstractLithium-transition metal (T)-pnictides (Pn=P, As, Sb, Bi) are an interesting class of materials with greatly differing crystal structures. The transition metal and pnictide atoms build up covalently bonded networks that leave cavities or channels for the lithium atoms. Depending on the bonding of lithium to the polyanionic network, one observes mobility of the lithium atoms. The crystal chemistry, chemical bonding, 7Li solid-state NMR, and the electrochemical behavior of the pnictides are reviewed. The structural chemistry is compared with related tetrelides.

Spectroscopic characterization of silica aerogels prepared using several precursors – effect on the formation of molecular clusters

2017 ◽  
Vol 41 (14) ◽  
pp. 6742-6759 ◽  
Author(s):  
A. Borba ◽  
J. P. Vareda ◽  
L. Durães ◽  
A. Portugal ◽  
P. N. Simões
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Spectroscopic Characterization ◽  
Spectroscopic Properties ◽  
Silica Aerogels ◽  
Molecular Clusters

The structural and spectroscopic properties of silica aerogels were studied using complementary approaches, such as Fourier transform infrared spectroscopy and solid-state NMR spectroscopy.

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