Stability of porphyrin-calix[4]arene complexes analyzed by electrospray ionization mass spectrometry

Satoshi Arai, Shinsuke Ishihara, Shinji Takeoka, Haruki Ohkawa, Toshimichi Shibue, Hiroyuki Nishide

研究成果: Article査読

15 被引用数 (Scopus)

抄録

The stability of some porphyrin-calix[4]arene sodium-ion complexes were determined by a collision-activated decomposition (CAD) method utilizing electrospray ionization mass spectrometry (ESI-MS). Comparing the values of E1/2, the collision energy at which the relative intensity of the complex ion is 0.5, we found that the porphyrin-calix[4]arene complex with the higher value of E1/2 corresponded to that with the larger association constant (Kass), as measured by 1H-NMR in CDCl 3. Both our ESI-MS and NMR studies proved that the number of hydrogen bonds and the rigidity of the calix[4]arene stabilized the complex. The ESI-MS technique could be successful in screening the binding affinity in host-guest systems with a small amount of sample.

本文言語English
ページ(範囲)2065-2068
ページ数4
ジャーナルRapid Communications in Mass Spectrometry
18
18
DOI
出版ステータスPublished - 2004 9 24

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry

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