{
  "abstract": "The energy transfer mechanism between organic ligands and lanthanide-based near-infrared emitters, such as ytterbium ions (Yb3+), is of great photophysical interest. In recent years, lanthanides have attracted attention for their capacity for both up-and down-conversion for a range of applications. While lanthanides generally have extremely small absorption cross-sections, their light-matter interaction can be complemented by an appropriate choice of chromophore ligand. Here, we investigate intramolecular ligand-to-Yb3+ triplet energy transfer in ytterbium tris(8-hydroxyquinoline) (YbQ3) molecule as well as the intermolecular sensitization of Yb3+ by palladium(II) octaethylporphyrin (PdOEP). We find that the intramolecular sensitization leads to a Yb3+ photoluminescence quantum yield (PLQY) of (9.7 ± 1.0)% and and that the local ligand environment results in a relatively short lanthanide emission lifetime of 12.1 ± 0.1 µs. As for the intermolecular energy transfer mechanism in the YbQ3/PdOEP mixture, this is governed by a dynamic quenching of the phosphorescence from PdOEP. Despite the relatively weak collisional probability of energy transfer, requiring ∼ 400 collision events in solution, the PLQY of Yb3+ emission in the mixture was (4.5 ± 0.7)% for selective PdOEP excitation. These results indicate that while triplets can be effective sensitizers for near-infrared lanthanide emission, careful design of the sensitization pathway is required.",
  "abstract_shown": true,
  "affiliations": [
    "School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, NSW 2052, Australia",
    "School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Syed Hamad Ullah Shah"
    },
    {
      "affs": [
        1
      ],
      "name": "Ben P. Carwithen"
    },
    {
      "affs": [
        1
      ],
      "name": "Cameron M. Gould"
    },
    {
      "affs": [
        1
      ],
      "name": "Damon M. de Clercq"
    },
    {
      "affs": [
        1
      ],
      "name": "Liam L. Gotley"
    },
    {
      "affs": [
        0
      ],
      "name": "Irfan M. Khan"
    },
    {
      "affs": [
        1
      ],
      "name": "Scott A. Sulway"
    },
    {
      "affs": [
        1
      ],
      "name": "Timothy W. Schmidt"
    },
    {
      "affs": [
        0
      ],
      "name": "Michael P. Nielsen",
      "orcid": "0000-0002-0457-7208"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/95d813n91j2es.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009357/v1",
  "fulltext_url": null,
  "id": "95d813n91j2es",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009357/v1",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|Lanthanide and Transition Metal Complexes"
    ]
  ],
  "openalex": "W7214083339",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15009357/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/95d813n91j2es.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:21Z",
      "native_id": "10.26434/chemrxiv.15009357",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009357/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Lanthanide and Transition Metal Complexes",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Photophysics and Triplet Sensitization of the Molecular Lanthanide YbQ3",
  "title_text": "Photophysics and Triplet Sensitization of the Molecular Lanthanide YbQ3",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:21Z",
  "url": "https://research.draconitic.com/paper/95d813n91j2es",
  "venue": "ChemRxiv",
  "versions": []
}