The complexation of alkali metal ions by crown ethers, aza crown ethers, and cryptands in propylene carbonate

1989 ◽  
Vol 7 (6) ◽  
pp. 581-588 ◽  
Author(s):  
Hans-J�rgen Buschmann
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Propylene Carbonate ◽  
Crown Ethers ◽  
Alkali Metal Ions ◽  
Aza Crown Ethers

Complexation of Alkali Metal Ions by the Cryptand 4,7,13,16-Tetraoxa-1,10-diazabicyclo[8.8.5]tricosane in Several Solvents

1994 ◽  
Vol 47 (1) ◽  
pp. 123 ◽  
Author(s):  
R Dhillon ◽  
SF Lincoln
Keyword(s):  
Stability Constant ◽  
Alkali Metal ◽  
Metal Ions ◽  
Potentiometric Titration ◽  
Propylene Carbonate ◽  
Alkali Metal Ions ◽  
Factors Affecting ◽  
The Stability ◽  
Titration Study ◽  
Complexation Process

A potentiometric titration study of the complexation of metal ions (M+) by 4,7,13,16- tetraoxa-1,10-diazabicyclo[8.8.5] tricosane (C22C5) at 298.2 K and I = 0.05 (NEt4ClO4) yields log(K/dm3 mol-1) =6.07 and 5.36, 7.55 and 5.95, 6.26 and 7.56, 5.5 and 6.66, 4.57 and 5.16, and 8.14 and 14.51 when M+ = Li+, Na+, K+, Rb +, Cs+ and Ag+, respectively, where the first and second magnitudes of each pair refer to the stability constant (K) for [M(C22C5)]+ in acetonitrile and ropylene carbonate solvent, respectively. A 7Li n.m.r. tudy yields kd (298.2 K) = 428 s-1, ∆ Hd ‡ = 24.7 kJ mol-1 and ∆ Sd ‡ = -111 J K-1 mol-1 for the monomolecular decomplexation of Li+ from [Li(C22C5)]+, and kc(298.2 K) = 9.83×107 dm3 mol-1 s-1 for the complexation process in propylene carbonate. These data are compared with those for related systems and are discussed in terms of the factors affecting cryptate stability and lability.

scholarly journals Detection of alkali metal ions by fluorescent signalling crown ethers

2002 ◽  
Vol 58 (s1) ◽  
pp. c311-c311
Author(s):  
J. F. Malone ◽  
A. Alves-Areias ◽  
A. P. deSilva ◽  
T. S. Moody
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Crown Ethers ◽  
Alkali Metal Ions

Effect of rigid fragments in the macrocycle on the adaptation of crown ethers to alkali-metal ions

1990 ◽  
Vol 26 (3) ◽  
pp. 332-336
Author(s):  
L. P. Trigub ◽  
V. E. Kuz'min ◽  
P. I. Kodachenko
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Crown Ethers ◽  
Alkali Metal Ions

Systematic Investigation of Alkali Metal Ions as Additives for Graphite Anode in Propylene Carbonate Based Electrolytes

2017 ◽  
Vol 250 ◽  
pp. 285-291 ◽  
Author(s):  
K.W.D. Kaveendi Chandrasiri ◽  
Cao Cuong Nguyen ◽  
Yuzi Zhang ◽  
Bharathy S. Parimalam ◽  
Brett L. Lucht
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Propylene Carbonate ◽  
Systematic Investigation ◽  
Graphite Anode ◽  
Alkali Metal Ions
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