Selective chromogenic response via regioselective binding of cations: a novel approach in chemosensor design

Ataman D., Akkaya E.

TETRAHEDRON LETTERS, cilt.43, sa.22, ss.3981-3983, 2002 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 43 Sayı: 22
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1016/s0040-4039(02)00725-6
  • Dergi Adı: TETRAHEDRON LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.3981-3983
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

A calixdiquinone bis-indoaniline derivative with two kinds of potential binding sites, discriminates cations according to their charge/size ratio. Harder and highly oxophilic Eu(III) preferentially interacts with the lower rim quinone oxygens; whereas Na(I) binds to the azacrown moieties. As a consequence of the chromogenic sensor s design, these two binding events result in two different responses, Eu(III) causes a remarkable auxochromic change, but Na(I) produces a significant anti-auxochromic effect. (C) 2002 Elsevier Science Ltd. All rights reserved.