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MLCT based colorimetric probe for iron having D–A–D type architecture of benzo[2,1,3]thiadiazole acceptor and thiophene donor with azomethine pendant arm

Authors
Journal
Inorganic Chemistry Communications
1387-7003
Publisher
Elsevier
Volume
39
Identifiers
DOI: 10.1016/j.inoche.2013.10.042
Keywords
  • Donor–Acceptor
  • Intramolecular Charge Transfer
  • Mlct
  • Iron Sensor
  • Azomethine

Abstract

Abstract A new chemosensor 3 having D–A–D type architecture of benzo[2,1,3]thiadiazole acceptor and thiophene donor with azomethine pendant arm was synthesized and its metal recognition capability was studied over the first row transition metal series. Compound 3 showed colorimetric sensitivity and selectivity towards for Fe(II) and Fe(III). Change in the strength of intramolecular charge transfer (ICT) due to metal to ligand charge transfer (MLCT) is responsible for color change. It has been established using CV and NMR titration. The sensitivity of 3 is in the range of μM concentration that leads to the visual detection by changing color from yellow to orange.

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