11 Ion Analysis

Dibenzyl-14-crown-4

Dibenzyl-14-crown-4

Ionophore

  • Product code
    D043  Dibenzyl-14-crown-4
  • CAS No.
    106868-21-7
  • Chemical name
    6,6-Dibenzyl-1,4,8,11-tetraoxacyclotetradecane
  • MW
    C24H32O4=384.51
Unit size Price Item Code
50 mg $246.00 D043-10
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Discription

Dibenzyl-14-crown-4 is 200 times more selective for lithium than for sodium or potassium. Though Dibutyl-phenanthroline is 1,000 times more selective for lithium than sodium at a controlled pH, Dibenzyl-14-crown-4 is less pH-sensitive.

 

Chemical Structure

 

Technical info

LogKpot(Li/Na): -2.5, LogKpot(Li/K): -2.3, LogKpot(Li/Cs): -1.6, LogKpot(Li/Rb): -2.2, LogKpot(Li/NH4): -3.1, LogKpot(Li/H): -3.2, LogKpot(Li/Mg): -4.3, LogKpot(Li/Ca): -4.9, LogKpot(Li/Ba): -4.7, LogKpot(Li/Sr): -4.3 Formulation: Ionophore: 1%, NPOE: 70%, K-TCPB: 50 mol% of ionophore/PVC, THF

References

Open References

1. K. Kimura, et al., "Lithium Ion Selective Electrodes Based on Crown Ethers for Serum Lithium Assay." Anal Chem. 1987;59:2331-2334.
2. K. Kimura, et al., "Synthesis and Selectivity for Lithium of Lipophilic 14-Crown-4 Derivatives Bearing Bulky Substituents or an Additional Binding Site in the Side Arm." J Chem Soc Perkin Trans 2. 1986;12:1945-1951.

Handling and storage condition

Specification
Appearance: White crystalline powder
Solubility in Chloroform: To pass test (clear, colorless)
Purity (HPLC): ≧ 98.0 %
m.p.: 97 - 103°C
IR spectrum: Authentic
NMR spectrum: Authentic
Handling and storage condition
Ambient temperature
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Product Classification

Product Classification

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