ChemInform Abstract: Crystal Structure, Raman and Resonance Raman Spectroscopic Studies of the Dimethyl Diquaternary Salt of 2,2′-Dicyano-4,4′-bipyridine and Its Radical Monocation

ChemInform ◽  
1989 ◽  
Vol 20 (8) ◽  
Author(s):  
J. S. BUCKLETON ◽  
G. R. CLARK ◽  
C. E. F. RICKARD ◽  
R. P. COONEY ◽  
D. J. BARKER ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Resonance Raman ◽  
Spectroscopic Studies ◽  
Raman Spectroscopic

Na2La4(NH2)14·NH3, a lanthanum-rich intermediate in the ammonothermal synthesis of LaN and the effect of ammonia loss on the crystal structure

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sebastian Kunkel ◽  
Rainer Niewa
Keyword(s):  
Crystal Structure ◽  
Liquid Ammonia ◽  
Spectroscopic Studies ◽  
Ammonia Loss ◽  
Raman Spectroscopic ◽  
Sodium Cations ◽  
Retrograde Solubility ◽  
Third Dimension ◽  
Supercritical Ammonia ◽  
Similar Unit

Abstract Single crystals of Na2La4(NH2)14·NH3 were obtained from supercritical ammonia under ammonobasic conditions at a temperature of 573 K and 120 MPa pressure. It represents a lanthanum-rich intermediate in the ammonothermal synthesis of LaN. Upon aging, the title compound loses the crystal ammonia, resulting in pale crystals of Na2La4(NH2)14, the original space group P212121 being retained in a very similar unit cell. However, the crystal structure reacts to subtle changes in the composition as well as to the modified coordination of particularly the sodium cations interconnecting lanthanum amide layers within a third dimension. Results of Raman spectroscopic studies are reported. The observations of thermal analysis measurements indicating the formation of lanthanum nitride, in combination with the observed retrograde solubility in liquid ammonia, contribute to the knowledge of the ammonothermal crystal growth of lanthanum nitride.

scholarly journals Electrochemical and Resonance Raman Spectroscopic Studies of Water-Oxidizing Ruthenium Terpyridyl-Bipyridyl Complexes

ChemSusChem ◽  
2016 ◽  
Vol 10 (3) ◽  
pp. 551-561 ◽  
Author(s):  
Anke Keidel ◽  
Isidoro López ◽  
Jana Staffa ◽  
Uwe Kuhlmann ◽  
Fernando Bozoglian ◽  
...  
Keyword(s):  
Resonance Raman ◽  
Spectroscopic Studies ◽  
Raman Spectroscopic
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