Self-Assembly Assisted Tandem Sensing of Pd2+ and CN by a Perylenediimide-Peptide Conjugate

Bapan Pramanik, Sahnawaz Ahmed, Nilotpal Singha, Debapratim Das

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


A tandem sensor for Pd2+ and CN ions based on perylenediimide-peptide conjugate is reported. The probe showed high selectivity toward Pd2+ ion over other metal cations and the sensitivity was observed to be 0.55 ppb, significantly lower than other similar chemosensors. Binding with Pd2+ leads to aggregation of the ligand and consequently results in quenching of its emission. The quenched emission can be turned on in presence of CN ions as the cyanides form stronger complex with Pd2+ leading to disaggregation of the aggregated system. The system was found to be extremely selective to CN and the detection limit in this case was calculated to be as low as 0.226 ppb. The sensor is also utilized to construct a practical and simple TLC based tool to sense these two ions efficiently.

Original languageEnglish
Pages (from-to)10061-10066
Number of pages6
Issue number31
StatePublished - 31 Oct 2017
Externally publishedYes


  • Cyanide
  • Palladium
  • Perylenediimide
  • Self-aggregation
  • Sensor

ASJC Scopus subject areas

  • General Chemistry


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