Syntheses and separating properties of triazacrown and AM18C6 bonded Merrifield peptide resins

Kim, Dong Won; Lee, Nam Soo; Kim, Chang Suk; Ryu, Hai Il; Kim, Jong Seung; Kang, Byung Moo; Jeon, Young Shin

doi:10.1016/s0014-3057(02)00083-6

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…Because macrocyclic compound could make complex compound with many ions, the ion exchange capacity of complex compound was related in ion size and cavity of macrocyclic compound. 5,17 As in the result, tetraazacycloes tethered to Merrifield peptide resin (DTDM and TTTM) were showed to the high ion exchange capacity.…”

Section: Resultsmentioning

confidence: 81%

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Separation of Lithium Isotopes by Tetraazamacrocycles Tethered to Merrifield Peptide Resin

Jeon¹,

Jang²,

Kang³

et al. 2007

Bulletin of the Korean Chemical Society

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Tetraazamacrocyclic ion exchangers tethered to Merrifield peptide resin (DTDM, TTTM) were prepared and the ion exchange capacity of these was characterized. The isotope separation of lithium was determined using breakthrough method of column chromatography. The isotope separation coefficient was strongly dependent on the ligand structure by Glueckauf's theory. We found that the isotope separation coefficients were increased as the values of distribution coefficients were increased. In this experiment the lighter isotope, 6 Li was enriched in the resin phase, while the heavier isotope, 7 Li in the solution phase. The ion radius of lighter isotope, 6 Li was shorter than the heavier isotope, Li. The hydration number of lithium ion with the same charge became small as mass number was decreased. Because 6 Li was more strongly retained in the resin than 7 Li, the isotopes of lithium were separated with subsequent enrichment in the resin phase.

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Section: Resultsmentioning

confidence: 81%

“…They reported a wide study of various isotope separation condition. [4][5][6][7] Ion exchange effect of lithium ion in an aqueous NH4Cl solution, measurement of distribution coefficient, separation factor would be performed. We try to find the efficiency of lithium isotope separation.…”

Section: Introductionmentioning

confidence: 99%