• 한국산학기술학회논문지
• /
• 제12권10호
• /
• pp.4696-4703
• /
• 2011

본 연구에서는 메리필드펩타이드 수지가 치환된 테트라아자거대고리 화합물인 1,4,8,11-tetraazacyclotetradecane bonded Merrifield peptide resin(TDM)과 1,4,8,12-tetraazacyclopentadecane bonded Merrifield peptide resin(TPM)을 합성 하였다. 합성된 이온교환수지의 이온교환용량을 측정하였고, 또한 여러 농도의 염화암모늄용액에서 마그네슘이온의 분포계수를 측정하였다. 새롭게 합성한 테트라아자거대고리 화합물(TDM, TPM)을 가지고 컬럼크로마토그래피법을 이용하여 마그네슘 동위원소를 분리하고 그 효용성을 논의하였다.

• Bulletin of the Korean Chemical Society
• /
• 제28권3호
• /
• pp.451-456
• /
• 2007

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, 6Li was enriched in the resin phase, while the heavier isotope, 7Li in the solution phase. The ion radius of lighter isotope, 6Li was shorter than the heavier isotope, 7Li. The hydration number of lithium ion with the same charge became small as mass number was decreased. Because 6Li was more strongly retained in the resin than 7Li, the isotopes of lithium were separated with subsequent enrichment in the resin phase.