Solution and co-ordination enthalpies (solid state) of lithium and sodium macrocycle (ethyl p-tert-butylcalix(4)arene tetraethanoate, cryptand 222 and crown ethers) systems

1998 ◽  
Vol 94 (20) ◽  
pp. 3111-3115 ◽  
Author(s):  
Angela F. Danil de Namor ◽  
Lupe E. Pulcha Salazar ◽  
Margot A. Llosa Tanco ◽  
Dorota Kowalska ◽  
Jose Villanueva Salas ◽  
...  
Keyword(s):  
Solid State ◽  
Crown Ethers ◽  
Cryptand 222

Solvent Extraction of Amino Acids With Crown Ethers and Cryptand 222

1995 ◽  
Vol 28 (5) ◽  
pp. 835-843 ◽  
Author(s):  
Lucia Mutihac ◽  
Daniela Oana Popescu ◽  
Raluca-Ioana Stefan
Keyword(s):  
Amino Acids ◽  
Solvent Extraction ◽  
Crown Ethers ◽  
Cryptand 222

scholarly journals Polyhalides as scaffolds for supramolecular, ion-conducting crown ether stacks

2014 ◽  
Vol 70 (a1) ◽  
pp. C634-C634
Author(s):  
Katharina Fromm ◽  
Aurélien Crochet ◽  
Cyrille Dagri ◽  
Yvens Chérémond
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Crown Ethers ◽  
Halogen Bonding ◽  
Building Blocks ◽  
Channel Formation ◽  
One Dimensional ◽  
Naoh Solution ◽  
Ion Conducting

"Crown ethers, such as dibenzo-18-crown-6 (DB18C6) are in principle perfect building blocks to be stacked on top of each other for one-dimensional (1D) channel formation. However, in the more than 1000 publications on crown ethers in the solid state, only one case was of channel formation described, but not as main focus of research.[1] We now present a way to systematically induce the stacking of DB18C6 with the help of polyhalides, which play the roles of scaffolds via halogen bonding.[2] These compounds can be considered as ""supramolecular straws"". Using for example potassium as couter ion for triiodide for example, we obtained a solid which contains three differently filled, parallel channels in the solid state, which are arranged between the polyhalide anions. Exchanging potassium with sodium by immersion of a single crystal into NaOH solution leads to a single-crystal-to-single-crystal transformation into a compound with two channel types. This transition from a system crystallizing initially in the P2-space group to yield a compound in Pccn is only possible under these very special conditions. We will further present how the ion transport through these channels can be quantified and which process is involved in ion exchange. The role of the polyhalide anions, which cannot be replaced by other linear anions, will be emphasized as well. "

Sodium and potassium benzeneazophosphonate complexes with crown ethers: Solid-state microwave synthesis, characterization and biological activity

Polyhedron ◽  
2009 ◽  
Vol 28 (16) ◽  
pp. 3449-3458 ◽  
Author(s):  
Ljerka Tušek-Božić ◽  
Christophe Pannecouque ◽  
Erik De Clercq ◽  
Jan Balzarini
Keyword(s):  
Biological Activity ◽  
Solid State ◽  
Crown Ethers ◽  
Microwave Synthesis ◽  
Sodium And Potassium

New Fluorescent Calix Crown Ethers, Part II: Synthesis and Complex Formation in Solution and the Solid State

2008 ◽  
Vol 2008 (31) ◽  
pp. 5231-5238 ◽  
Author(s):  
Ion Stoll ◽  
Ralf Brodbeck ◽  
Sebastian Wiegmann ◽  
Jens Eberhard ◽  
Silke Kerruth ◽  
...  
Keyword(s):  
Solid State ◽  
Complex Formation ◽  
Crown Ethers

Potential of polymethacrylate pseudo crown ethers as solid state polymer electrolytes

2017 ◽  
Vol 53 (51) ◽  
pp. 6899-6902 ◽  
Author(s):  
S. Moins ◽  
J. C. Martins ◽  
A. Krumpmann ◽  
V. Lemaur ◽  
J. Cornil ◽  
...  
Keyword(s):  
Solid State ◽  
Dft Calculations ◽  
Crown Ethers ◽  
Polymer Electrolytes ◽  
Kinetic Studies

The association of kinetic studies, DFT calculations and 1H–7Li NMR analyses allowed the control of the cyclo-ATRP of PEG9DMA and the production of polymethacrylate pseudo crown-ethers of various molar masses.

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