{
  "abstract": "A simple pyrazole-based colorimetric chemosensor, 4( E )-1-(4-((2-(2,4-dinitrophenyl)hydrazinylidene)methyl)phenyl)-1H-pyrazole ( PY-09 ), was developed for the selective detection of arsenate (AsO 4 3− ) and cyanide (CN − ) ions through distinct optical responses. The free probe exhibited a yellow colour, which changed to magenta upon interaction with either AsO 4 3− or CN − , enabling rapid naked-eye detection. UV–Vis absorption studies revealed a bathochromic shift from 403 nm to 507 nm for AsO 4 3− and to 508 nm for CN − . The probe demonstrated high sensitivity, with detection limits of 0.99 μM for AsO 4 3− and 0.29 μM for CN − . Job's plot analysis indicated binding stoichiometries of 1:1 for both AsO 4 3− and CN − , while the corresponding association constants were determined to be 2.14 × 10 5 M −1 and 4.4 × 10 4 M −1 , respectively. The sensing process was reversible upon the addition of trifluoroacetic acid (TFA). Furthermore, hydrogen peroxide was successfully employed as a masking agent to selectively eliminate cyanide interference, enabling the specific detection of arsenate ions. The practical applicability of PY-09 was validated through successful analysis of real water samples, demonstrating excellent recovery and reliability. These findings highlight PY-09 as a simple, sensitive, and cost-effective colorimetric chemosensor, demonstrating its potential for colorimetric arsenate detection in water samples.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India",
    "Corresponding author."
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "U. Mithra"
    },
    {
      "affs": [
        0
      ],
      "name": "V. Vijayakumar"
    },
    {
      "affs": [
        1
      ],
      "name": "S. Sarveswari"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/74zf26m8jwxa9.bib",
  "cited_by": 0,
  "doi": "10.1016/j.rechem.2026.104052",
  "fulltext_url": "http://www.sciencedirect.com/science/article/pii/S221171562601026X",
  "id": "74zf26m8jwxa9",
  "issns": [
    "2211-7156"
  ],
  "landing_url": "https://doi.org/10.1016/j.rechem.2026.104052",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "QD1-999"
    ],
    [
      "openalex",
      "1607|Molecular Sensors and Ion Detection"
    ]
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  "openalex": "W7225403345",
  "pdf_url": "https://www.sciencedirect.com/science/article/pii/S221171562601026X/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-09",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/74zf26m8jwxa9.ris",
  "sources": [
    {
      "first_seen": "2026-11-09T14:21:32Z",
      "native_id": "085ace9cbd6e41b0a0213706988d48d5",
      "source": "doaj",
      "url": "https://doi.org/10.1016/j.rechem.2026.104052"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1607|Molecular Sensors and Ion Detection",
      "subfield": "physical"
    }
  ],
  "title": "A pyrazole-based colorimetric chemosensor for selective arsenate detection in the presence of cyanide interference",
  "title_text": "A pyrazole-based colorimetric chemosensor for selective arsenate detection in the presence of cyanide interference",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T14:21:32Z",
  "url": "https://research.draconitic.com/paper/74zf26m8jwxa9",
  "venue": "Results in Chemistry",
  "versions": []
}