scholarly journals A Conductance Study of the Complexation Reaction of Dibenzo-24-crown-8 with Alkali Metal Ions in Propylene Carbonate and Methanol

1980 ◽  
Vol 53 (6) ◽  
pp. 1720-1722 ◽  
Author(s):  
Yasuyuki Takeda ◽  
Hisao Yano
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Propylene Carbonate ◽  
Alkali Metal Ions ◽  
Complexation Reaction

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.

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

Ion–peptide interactions between alkali metal ions and a termini-protected dipeptide: modeling a portion of the selectivity filter in K+ channels

2019 ◽  
Vol 21 (2) ◽  
pp. 561-571 ◽  
Author(s):  
Shun-ichi Ishiuchi ◽  
Yuta Sasaki ◽  
James M. Lisy ◽  
Masaaki Fujii
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Selectivity Filter ◽  
Alkali Metal Ions ◽  
K Channels ◽  
Peptide Interactions

Differentiating K+ and Na+ binding patterns in peptide sequences.

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