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.

Orthoamide und Iminiumsalze, IC. Synthese und Reaktionen von N,N,N′,N′,N′′-Pentaalkyl-N′′-[2-(N,N,N′,N′,N′′-pentaalkylguanidinio)ethyl]-guanidiniumsalzen

2020 ◽  
Vol 75 (6-7) ◽  
pp. 685-695
Author(s):  
Willi Kantlehner ◽  
Ioannis Tiritiris ◽  
Wolfgang Frey ◽  
Ralf Kreß
Keyword(s):  
Crystal Structure ◽  
Guanidinium Salt ◽  
Guanidinium Salts

AbstractBis[bis(dibutylamino)methylen]hydrazine 8 is prepared from N,N,N′,N′-tetrabutylchloroformamidinium chloride (4c) and hydrazine. Bromine transforms 8 to the heterocyclic guanidinium salt 15a which is isolated as tetraphenylborate. From N,N,N′,N′-tetraalkylchloroformamidiniumchlorides and ethylendiamine the diguanidines are prepared which are alkylated to give diguanidinium salts, From these salts guanidinium salts can be prepared by anion metathesis with tetraphenylborate-, iodide-, hexafluorphosphate-, trifluoromethansulfonat-, bis(trifluormethansulfonyl)imide and tricyanmethanide as counteranions. The structure of the compounds 15 and 17b is confirmed by crystal structure analyses.

Polyoxometalate driven dendrite-free zinc electrodes with synergistic effects of cation and anion cluster regulation

2021 ◽  
Vol 9 (11) ◽  
pp. 7025-7033
Author(s):  
Hai-Yang Wu ◽  
Xingxing Gu ◽  
Peng Huang ◽  
Chuang Sun ◽  
Hai Hu ◽  
...  
Keyword(s):  
Synergistic Effects ◽  
Electrolyte Additives ◽  
Highly Efficient ◽  
Anion Cluster ◽  
Free Zinc ◽  
Anions And Cations

Dendrite-free Zn anodes are achieved by using the highly efficient electrolyte additives based on polyoxometalate. Both of the anions and cations of polyoxometalate play important roles in inhibiting the growth Zn dendrites.

Simultaneous ion chromatographic separation of anions and cations on poly(aspartic acid) functionalized silica

The Analyst ◽  
2001 ◽  
Vol 126 (12) ◽  
pp. 2119-2123 ◽  
Author(s):  
Maria G. Kiseleva ◽  
Pavel A. Kebets ◽  
Pavel N. Nesterenko
Keyword(s):  
Aspartic Acid ◽  
Chromatographic Separation ◽  
Functionalized Silica ◽  
Anions And Cations

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

Multimodal Optical Nanoprobe for Advanced In-Situ Electron Microscopy

2012 ◽  
Vol 20 (6) ◽  
pp. 32-37 ◽  
Author(s):  
Y. Zhu ◽  
M. Milas ◽  
M.-G. Han ◽  
J.D. Rameau ◽  
M. Sfeir
Keyword(s):  
Electron Microscopy ◽  
Driving Forces ◽  
Atomic Scale ◽  
Magnetic Domains ◽  
Photovoltaic Devices ◽  
Electromagnetic Devices ◽  
In Situ Electron Microscopy ◽  
Electric And Magnetic Fields ◽  
Anions And Cations

In-situ electron microscopy has gained considerable attention in recent years. It provides a “live” view of a material or device under study at various length scales. For example, by heating or cooling a sample one can study structural change at the atomic scale to understand the driving forces and mechanisms of phase transitions. By applying electric and magnetic fields on a ferroelectric or magnetic architecture in operation, one can directly observe how electric and magnetic domains switch, how anions and cations shift their positions, and how spins change their configuration across a domain wall, aiding the development of better electromagnetic devices. In the study of photovoltaic devices and junctions, a major challenge is to directly correlate light-induced electric currents with local structural inhomogeneities and dynamics. Such a capability would allow us to evaluate the performance of individual p-n junctions and to improve optoelectronic efficiency.

High-resolution ion mobility measurements for silicon cluster anions and cations

1999 ◽  
Vol 111 (17) ◽  
pp. 7865-7870 ◽  
Author(s):  
Robert R. Hudgins ◽  
Motoharu Imai ◽  
Martin F. Jarrold ◽  
Philippe Dugourd
Keyword(s):  
High Resolution ◽  
Ion Mobility ◽  
Silicon Cluster ◽  
Cluster Anions ◽  
Anions And Cations
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