scholarly journals A thermophysical and structural characterization of ionic liquids with alkyl and perfluoroalkyl side chains

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 65337-65350 ◽  
Author(s):  
N. S. M. Vieira ◽  
P. M. Reis ◽  
K. Shimizu ◽  
O. A. Cortes ◽  
I. M. Marrucho ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Structural Characterization ◽  
Side Chains

Novel fluorinated ionic liquids composed of 1-alkyl-3-methylimidazolium cations and perfluoroalkylsulfonates or perfluoroalkylcarboxylates anions were investigated from thermodynamic, thermophysical and simulation perspectives.

Structural characterization of folded and extended conformations in peptides containing γ amino acids with proteinogenic side chains: crystal structures of γn, (αγ)n and γγδγ sequences

2015 ◽  
Vol 39 (5) ◽  
pp. 3319-3326 ◽  
Author(s):  
Madhusudana M. B. Reddy ◽  
K. Basuroy ◽  
S. Chandrappa ◽  
B. Dinesh ◽  
B. Vasantha ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Crystal Structures ◽  
Structural Characterization ◽  
Side Chains ◽  
Amino Acid Residues

γn amino acid residues can be incorporated into structures in γn and hybrid sequences containing folded and extended α and δ residues.

Synthesis and structural characterization of a series of uranyl-betaine coordination complexes

2018 ◽  
Vol 233 (7) ◽  
pp. 507-513 ◽  
Author(s):  
Philip A. Smith ◽  
Tyler L. Spano ◽  
Peter C. Burns
Keyword(s):  
Ionic Liquids ◽  
Structural Characterization ◽  
Coordination Complexes ◽  
Structural Chemistry

Abstract Trimethylglycine and betainium class ionic liquids were employed in synthesizing six uranyl-betaine coordination complexes: [(μ2-(CH3)N2C3H3(CH2COO))2 (UO2(Cl)((CH3)N2C3H3(CH2COO)))2] 2[N(SO2CF3)2] (1), [K][UO2(Cl)3((CH3)3NCH2COO)] (2), [(CH3)3NCH2COOH][UO2(Cl)3((CH3)3NCH2COO)]⋅H2O (3), [LiUO2(μ2-(CH3)3NCH2COO)4] 3[N(SO2CF3)2] (4) {(μ2-(CH3)3NCH2COO)UO2(NO3)2((CH3)3NCH2COO)}2 UO2(NO3)2, UO2(NO3)2(H2O)2⋅H2O (5), and UO2(Cl)2(H2O)(μ2-(CH3)3NCH2COO) (6). These complexes expound upon the variability of monocarboxyl-functionalized uranyl coordination complexes, providing an enhanced framework for investigations into the structural chemistry of analogous actinyl systems.

Synthesis, crystallization, X-ray structural characterization and solid-state assembly of a cyclic hexapeptoid with propargyl and methoxyethyl side chains

2017 ◽  
Vol 73 (3) ◽  
pp. 399-412 ◽  
Author(s):  
Consiglia Tedesco ◽  
Eleonora Macedi ◽  
Alessandra Meli ◽  
Giovanni Pierri ◽  
Giorgio Della Sala ◽  
...  
Keyword(s):  
Solid State ◽  
Hydrogen Bonds ◽  
Structural Characterization ◽  
Crystal Form ◽  
Side Chains ◽  
Crystal Forms ◽  
Hydrate Crystal ◽  
The Stability ◽  
Efficient Packing

The synthesis and the structural characterization of a cyclic hexapeptoid with four methoxyethyl and two propargyl side chains have disclosed the presence of a hydrate crystal form [form (I)] and an anhydrous crystal form [form (II)]. The relative amounts of form (I) and form (II) in the as-purified product were determined by Rietveld refinement and depend on the purification procedures. In crystal form (I), peptoid molecules assemble in a columnar arrangement by means of side-chain-to-backbone C=CH...OC hydrogen bonds. In the anhydrous crystal form (II), cyclopeptoid molecules form ribbons by means of backbone-to-backbone CH2...OC hydrogen bonds, thus mimicking β-sheet secondary structures in proteins. In both crystal forms side chains act as joints among the columns or the ribbons and contribute to the stability of the whole solid-state assembly. Water molecules in the hydrate crystal form (I) bridge columns of cyclic peptoid molecules, providing a more efficient packing.

scholarly journals Physical Properties and Structural Characterization of Ionic Liquids and Solid Electrolytes Utilizing the Carbamoylcyano(nitroso)methanide Anion

ChemPlusChem ◽  
2013 ◽  
Vol 78 (6) ◽  
pp. 468-468
Author(s):  
Judith Janikowski ◽  
Mohd R. Razali ◽  
Craig M. Forsyth ◽  
Kate M. Nairn ◽  
Stuart R. Batten ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Physical Properties ◽  
Structural Characterization ◽  
Solid Electrolytes

Physical Properties and Structural Characterization of Ionic Liquids and Solid Electrolytes Utilizing the Carbamoylcyano(nitroso)methanide Anion

ChemPlusChem ◽  
2013 ◽  
Vol 78 (6) ◽  
pp. 486-497 ◽  
Author(s):  
Judith Janikowski ◽  
Mohd R. Razali ◽  
Craig M. Forsyth ◽  
Kate M. Nairn ◽  
Stuart R. Batten ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Physical Properties ◽  
Structural Characterization ◽  
Solid Electrolytes

Structural characterization of a peptoid with lysine-like side chains and biological activity using NMR and computational methods

2013 ◽  
Vol 11 (4) ◽  
pp. 640-647 ◽  
Author(s):  
Ulrich Sternberg ◽  
Esther Birtalan ◽  
Igor Jakovkin ◽  
Burkhard Luy ◽  
Ute Schepers ◽  
...  
Keyword(s):  
Biological Activity ◽  
Computational Methods ◽  
Structural Characterization ◽  
Side Chains

scholarly journals Synthesis and structural characterization of imidazolium based dicationic ionic liquids

2020 ◽  
Author(s):  
Nassima Medjahed ◽  
Mensour DEBDAB ◽  
Boumediene HADDAD ◽  
El-habib BELARBI ◽  
Zahira KIBOU ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Structural Characterization ◽  
Dicationic Ionic Liquids
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