Synthesis and characterization of a series of macrocyclic chelates containing oxygen and nitrogen donors: prospects for use as NMR shift agents for alkali-metal cations

1990 ◽  
Vol 29 (19) ◽  
pp. 3645-3649 ◽  
Author(s):  
R. Merritt Sink ◽  
Douglas C. Buster ◽  
A. Dean Sherry
Keyword(s):  
Alkali Metal ◽  
Metal Cations ◽  
Synthesis And Characterization ◽  
Alkali Metal Cations ◽  
Nitrogen Donors

scholarly journals Synthesis and characterization of novel optically active, poly(ester-imide)s bearing calix[4]arene and amino acid moieties: ionophoric properties and extraction abilities towards alkali-metal cations

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Abdol-Reza Hajipour ◽  
Sakineh Habibi
Keyword(s):  
Alkali Metal ◽  
Good Yield ◽  
Metal Cations ◽  
Optically Active ◽  
Alkali Metal Cations ◽  
Extraction Ability ◽  
Triethyl Amine ◽  
Chiral Amino Acids ◽  
Upper Rim

AbstractOptically active poly(ester-imide)s (PEIs) containing upper rim calix[4]arene were prepared in good yield by polycondensation reactions of distal calix[4]arene diol with some optically active diacid chlorides. Pyromellitic dianhydride (3) was reacted with chiral amino acids (4a-4e) to obtain the resulting imide-acids (6a-6e). The compounds (6a-6e) were converted into the corresponding diacid chlorides (7a-7e). The polycondensation reactions of calixarene diol with optically active compounds 7a-7e were carried out by two methods: bulk polycondensation under microwave irradiation and solution polycondensation in a system of triethyl amine (TEA)/dichloromethane (CH2Cl2). The optically active PEIs had good yield and moderate inherent viscosity ranging between 0.18-0.38 dL/g. The extraction ability measurements of PEIs towards alkali metal cations (Na+, K+, Cs+) and Ag+ showed a remarkable efficiency and selectivity toward Ag+.

scholarly journals The phenoxyl group-modulated interplay of cation–π and σ-type interactions in the alkali metal series

2020 ◽  
Vol 22 (46) ◽  
pp. 27105-27120
Author(s):  
Giacomo Prampolini ◽  
Marco d'Ischia ◽  
Alessandro Ferretti
Keyword(s):  
Alkali Metal ◽  
Noncovalent Interactions ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
Striking Effect

An extensive exploration of the interaction PESs of phenol and catechol complexes with alkali metal cations reveals a striking effect of –OH substitution on the balance between cation-π and σ-type noncovalent interactions.

Influence of Alkali Metal Cations on the Photodimerization of Bromo Cinnamates Studied by Solid-State NMR

2020 ◽  
Vol 124 (50) ◽  
pp. 27614-27620
Author(s):  
Marufa Zahan ◽  
He Sun ◽  
Sophia E. Hayes ◽  
Harald Krautscheid ◽  
Jürgen Haase ◽  
...  
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Solid State Nmr ◽  
Metal Cations ◽  
Alkali Metal Cations

Derivation of Class II Force Fields. 4. van der Waals Parameters of Alkali Metal Cations and Halide Anions

1997 ◽  
Vol 101 (39) ◽  
pp. 7243-7252 ◽  
Author(s):  
Zhengwei Peng ◽  
Carl S. Ewig ◽  
Ming-Jing Hwang ◽  
Marvin Waldman ◽  
Arnold T. Hagler
Keyword(s):  
Alkali Metal ◽  
Force Fields ◽  
Van Der Waals ◽  
Metal Cations ◽  
Class Ii ◽  
Alkali Metal Cations ◽  
Halide Anions

Fluorescence enhancement of dibenzo-18-crown-6 by alkali metal cations

1980 ◽  
Vol 84 (9) ◽  
pp. 994-999 ◽  
Author(s):  
Haruo Shizuka ◽  
Kiyoshi Takada ◽  
Toshifumi Morita
Keyword(s):  
Alkali Metal ◽  
Fluorescence Enhancement ◽  
Metal Cations ◽  
Alkali Metal Cations
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