Evidence map›Paper›PMID 42489848›Full record

ArticlePhotochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology2026

Synthesis and photophysical properties of quaternaphthalenes: topology-dependent radiative dynamics in deep-blue emitters.

Minoru Yamaji, Kengo Suzuki, Hideki Okamoto

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Article in Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

3 authors.

Minoru YamajiDivision of Molecular Science, Graduate School of Science and Engineering, Gunma University, Ota, Gunma, 373-0057, Japan. yamaji@gunma-u.ac.jp.ORCID https://orcid.org/0000-0001-9963-2136
Kengo SuzukiHamamatsu Photonics K.K., Joko-cho, Hamamatsu, Shizuoka, 431-3196, Japan.
Hideki OkamotoDepartment of Chemistry, Faculty of Environment, Life, Natural Sciences and Technology, Okayama University, Okayama, Okayama, 700-8530, Japan.

Funding

Grant-in-Aids for Scientific Research from the Japan Society for the Promotion of Science (JSPS) JP18H02043, JP20K05648 and JP23K04877Grant-in-Aids for Scientific Research (JP18H02043, JP20K05648 and JP23K04877) from the Japan Society for the Promotion of Science (JSPS) JP18H02043, JP20K05648 and JP23K04877
6 · The paper itself

Abstract

A series of quaternaphthalenes (QNps) containing four naphthalene chromophores were synthesized and investigated as all-hydrocarbon multi-chromophore emitters. The QNps exhibited near-UV to deep-blue fluorescence in solution and retained emission in the solid state. The negligible solvent dependence of the fluorescence spectra supports locally excited π-π* emissive states rather than intramolecular charge-transfer states. Photophysical analysis revealed that the fluorescence behavior is governed primarily by naphthalene connectivity. Several QNps, especially 126151 and 126261, showed high fluorescence quantum yields and large radiative rate constants, whereas 126272 exhibited a smaller radiative rate and a longer fluorescence lifetime, indicating suppression of the radiative transition probability by a specific linkage topology. TD-DFT calculations showed that highly emissive QNps possess large oscillator strengths and mainly HOMO-LUMO-based S

Indexed as

Deep-blue fluorescenceDensity functional theory (DFT)Multi-chromophore systemRadiative rateSolid-state emissionStructure-property relationship

Identifiers

PMID42489848

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