{
  "abstract": "Dual emissive materials are of particular importance in chemical and biological assays. Herein, we focus on a rod-shaped Au42(SCH2CH2Ph)32 nanocluster that exhibits dual emission at 875 and 1040 nm owing to fluorescence (FL) and phosphorescence (PH), respectively. Transient absorption analysis shows a slow intersystem crossing (ISC, ∼500 ps) from lowest singlet S1 to triplet T1 upon direct S1 excitation, leading to dual emission from both S1 and T1. However, upon excitation of the higher Sn state, we observe a metastable singlet state (S'). We rationalize two competing decay pathways from S': (i) internal conversion to S1 and (ii) ISC to high triplet Tn≥2. These processes alter the populations of the S1 and T1 states, which explains the excitation-wavelength-dependent dual emission and FL/PH ratios. The revealed excited-state mechanism and the dual emissive Au42 material will serve as a paradigm for future research on atomically precise nanoclusters.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania15213, United States.",
    "Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania16802, United States.",
    "Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York11973, United States.",
    "School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia30332, United States.",
    "Department of Chemistry, Georgia State University, Atlanta, Georgia30302, United States."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Guiying He",
      "orcid": "0000-0002-4009-2590"
    },
    {
      "affs": [
        0
      ],
      "name": "Lianshun Luo",
      "orcid": "0000-0001-6158-6672"
    },
    {
      "affs": [
        2
      ],
      "name": "Mircea Cotlet",
      "orcid": "0000-0002-5024-3540"
    },
    {
      "affs": [
        3
      ],
      "name": "Guoxiang Hu"
    },
    {
      "affs": [
        4
      ],
      "name": "Gangli Wang",
      "orcid": "0000-0001-9204-7807"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Rongchao Jin",
      "orcid": "0000-0002-2525-8345"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/36hng0vr3bhtd.bib",
  "cited_by": 0,
  "doi": "10.1021/acs.nanolett.6c04058",
  "fulltext_url": "https://europepmc.org/articles/PMC13693494",
  "id": "36hng0vr3bhtd",
  "issns": [
    "1530-6984",
    "1530-6992"
  ],
  "landing_url": "https://europepmc.org/article/MED/42905091",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|Nanocluster Synthesis and Applications"
    ]
  ],
  "openalex": "W7221529594",
  "pdf_url": "https://europepmc.org/articles/PMC13693494?pdf=render",
  "pmcid": "PMC13693494",
  "pmid": "42905091",
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/36hng0vr3bhtd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:57Z",
      "native_id": "MED:42905091",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42905091"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Nanocluster Synthesis and Applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Excitation-Wavelength-Dependent Dual Emission in Au42 Quantum Rods.",
  "title_text": "Excitation-Wavelength-Dependent Dual Emission in Au42 Quantum Rods.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:57Z",
  "url": "https://research.draconitic.com/paper/36hng0vr3bhtd",
  "venue": "Nano letters",
  "versions": []
}