A novel donor–acceptor receptor for selective detection of Pb2+and Fe3+ ions

• We have revised manuscript taking account into both the reviewer comments.
• Scheme 1, has been revised.
• Figure 6. New figure is added to show plausible mechanism for both the cations.
• We also incorporate new references suggested by reviewer 1.
• An English correction has been made.

An efficient and highly selective colorimetric and fluorescent receptor DTPDA has been synthesized for sensitive detection of Pb2+ and Fe3+ cations. The sensor DTPDA produces a facile, cost-effective and naked eye sensing platform to determine trace amounts of Pb2+ and Fe3+ metal ions by complexation with pendent S-termini of thiophenes, which commonly coordinates to central N-termini of pyridine.

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