{
  "abstract": "A novel terbium(III) complex, Tb(SAH) , derived from salicylic acid hydrazide ( SAH ), was successfully synthesized and fully characterized. Stoichiometric analysis confirmed a 1:2 metal-to-ligand ratio. X-ray diffraction and microscopic studies revealed a polycrystalline structure with micro- and nanodomain features. Photoluminescence investigations demonstrated intense monochromatic emissions: blue for SAH and green for Tb(SAH) , with relatively long excited-state lifetimes in dimethylformamide (DMF), solid state, and polymeric matrices (PVA (polyvinyl alcohol), PMMA (polymethyl methacrylate), and silica xerogel). An efficient ligand-to-metal energy transfer mechanism under ultraviolet (UV) excitation was confirmed, indicating a strong antenna effect responsible for enhanced luminescence. Both SAH and Tb(SAH) were successfully applied in latent fingerprint visualization, clearly resolving level I–III ridge details on diverse porous, non-porous, and multicolored substrates. Additionally, transparent luminescent security inks prepared from the compounds exhibited excellent storage stability and humidity resistance, highlighting their suitability for anti-counterfeiting applications. Biological evaluation revealed that Tb(SAH) exhibits significantly greater in vitro cytotoxicity against the hepatocellular carcinoma (HepG-2) cell line than the free ligand. Significant antioxidant activity was observed for SAH and Tb(SAH) (IC ₅₀ = 0.38 and 0.78 μM, respectively), surpassing ascorbic acid. The Tb(SAH) complex also exhibited improved antidiabetic activity (IC ₅₀ = 14 μg/mL) compared with SAH (IC ₅₀ = 44 μg/mL), with potency comparable to that of acarbose (IC ₅₀ = 35 μg/mL). Antimicrobial studies indicated marked enhancement upon Tb ³ ⁺ coordination, particularly against Staphylococcus aureus . Molecular docking against DNA gyrase B (PDB ID: 6TCK) supported strong binding interactions, corroborating the experimental antimicrobial findings.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "name": "H. Nasser"
    },
    {
      "name": "Ebtesam M. Abdelrhman"
    },
    {
      "name": "M. Saif"
    },
    {
      "name": "R. Kamal"
    },
    {
      "name": "Magdy Shebl"
    },
    {
      "name": "R. Fouad"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1gsfpctj1t0sv.bib",
  "cited_by": 0,
  "doi": "10.1038/s41598-026-71747-0",
  "fulltext_url": null,
  "id": "1gsfpctj1t0sv",
  "issns": [
    "2045-2322"
  ],
  "landing_url": "https://www.nature.com/articles/s41598-026-71747-0",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|Lanthanide and Transition Metal Complexes"
    ]
  ],
  "openalex": "W7221459516",
  "pdf_url": "https://www.nature.com/articles/s41598-026-71747-0.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-12",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/1gsfpctj1t0sv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:26Z",
      "native_id": "10.1038/s41598-026-71747-0",
      "source": "crossref",
      "url": "https://www.nature.com/articles/s41598-026-71747-0"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Lanthanide and Transition Metal Complexes",
      "subfield": "materials-polymers"
    }
  ],
  "title": "A multifunctional Tb3+–salicylic acid hydrazide phosphor for anti-counterfeiting, forensic fingerprint visualization, and biological applications",
  "title_text": "A multifunctional Tb3+–salicylic acid hydrazide phosphor for anti-counterfeiting, forensic fingerprint visualization, and biological applications",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:26Z",
  "url": "https://research.draconitic.com/paper/1gsfpctj1t0sv",
  "venue": "Scientific Reports",
  "versions": []
}