scholarly journals Guanidinium Cation

2020 ◽  
Author(s):  
Keyword(s):  
Guanidinium Cation

An NMR solid-echo Study of Guanidinium Cation Reorientation in [C(NH2)3]3Sb2Cl9

2004 ◽  
Vol 59 (11) ◽  
pp. 787-790
Author(s):  
P. Bilski ◽  
M. Olszewskia ◽  
N. A. Sergeev ◽  
J. Wa̻sicki
Keyword(s):  
Wide Temperature Range ◽  
Temperature Range ◽  
Temperature Dependences ◽  
Time Position ◽  
Nmr Solid ◽  
Guanidinium Cation

The NMR solid-echo polycrystalline tris-guanidinium nonachlorodiantimonate (III) has been studied in a wide temperature range. The temperature dependences of a time position and an amplitude of solid-echo are characterized by minima at ca. 143 K and 273 K, which are assigned to the reorientation of two dynamically inequivalent guanidinium cations [C(NH2)3]+. The motional parameters of the two types of guanidinium cations have been determined. -PACS: 64.70K; 76.60.E

scholarly journals Activation of R235A Mutant Orotidine 5′-Monophosphate Decarboxylase by the Guanidinium Cation: Effective Molarity of the Cationic Side Chain of Arg-235

Biochemistry ◽  
2010 ◽  
Vol 49 (5) ◽  
pp. 824-826 ◽  
Author(s):  
Shonoi A. Barnett ◽  
Tina L. Amyes ◽  
B. McKay Wood ◽  
John A. Gerlt ◽  
John P. Richard
Keyword(s):  
Side Chain ◽  
Monophosphate Decarboxylase ◽  
Effective Molarity ◽  
Guanidinium Cation

scholarly journals Anionic and cationic Hofmeister effects are non-additive for guanidinium salts

2017 ◽  
Vol 19 (15) ◽  
pp. 9724-9728 ◽  
Author(s):  
V. Balos ◽  
M. Bonn ◽  
J. Hunger
Keyword(s):  
Anions And Cations ◽  
Guanidinium Cation ◽  
Guanidinium Salts

The interaction of spherical anions and cations with a model amide is additive, except for salts containing the guanidinium cation.

1H and 19F NMR Study of Cation and Anion Motions in Guanidinium Fluoroantimonates

1995 ◽  
Vol 50 (8) ◽  
pp. 742-748 ◽  
Author(s):  
M. Grottel ◽  
A. Kozak ◽  
Z. Pająk
Keyword(s):  
Solid Phase ◽  
Relaxation Times ◽  
Activation Parameters ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Temperature Phase ◽  
Fluorine Nmr ◽  
Spin Lattice ◽  
Nmr Study ◽  
Guanidinium Cation

Abstract Proton and fluorine NMR linewidths, second moments, and spin-lattice relaxation times of polycrystalline [C(NH2)3]2SbF5 and C(NH2)3SbF6 were studied in a wide temperature range. For the pentafluoroantimonate, C3-reorientation of the guanidinium cation and C4-reorientation of the SbF5 anion were revealed and their activation parameters determined. The dynamical inequivalence of the two guanidinium cations was evidenced. For the hexafluoroantimonate, two solid-solid phase transitions were found. In the low temperature phase the guanidinium cation undergoes C3 reorien­ tation while the SbF6 anion reorients isotropically. The respective activation parameters were derived. At high temperatures new ionic plastic phases were evidenced.

Relaxing the Goldschmidt Tolerance Factor: Sizable Incorporation of the Guanidinium Cation into a Two-Dimensional Ruddlesden–Popper Perovskite

2020 ◽  
Vol 32 (9) ◽  
pp. 4024-4037
Author(s):  
Susana Ramos-Terrón ◽  
Alexander D. Jodlowski ◽  
Cristóbal Verdugo-Escamilla ◽  
Luis Camacho ◽  
Gustavo de Miguel
Keyword(s):  
Tolerance Factor ◽  
Two Dimensional ◽  
Guanidinium Cation
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