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Boron nitride nanotubes (BNNTs) are wide bandgap one-dimensional nanomaterials that are promising hosts for defect-based luminescent material development. Herein, we report the formation and wavelength modulation of luminescent color centers (CCs) in BNNTs through reductive arylation. Phenyl-functionalized BNNTs exhibited new defect-related CC photoluminescence (PL) at 368 and 453 nm, respectively. Spectroscopic analyses revealed that arylation selectively formed B–C bonds, resulting in the introduction of sp³ boron defects within the BN framework for luminescent CC formation. The emission properties were modulated by the defect density: increasing the degree of aryl functionalization enhanced the contribution of longer-wavelength emission, suggesting the formation of lower-energy defect states at proximal sp³ boron defects. In addition, the CC PL wavelengths were further tuned by the electronic properties of para-substituents on the aryl groups, with electron donating substituents inducing red-shifted PL. Density functional theory calculations supported these experimental observations, showing that aryl functionalization narrows the band gap of BNNTs and that closely spaced sp³ boron defects generate lower-energy CC levels. These results demonstrate that reductive arylation provides a molecular defect-engineering strategy for controlling CC emission in BNNTs, offering a promising route toward chemically tunable nanoscale light sources based on functionalized boron nitride nanomaterials.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: arylation, boron nitride nanotube, color center, defect, photoluminescence

刊行年月日: 2026-10-15

出版者: Wiley

掲載誌:

• ChemPhotoChem (ISSN: 23670932) vol. 10 issue. 10 e70316

研究助成金:

• Japan Society for the Promotion of Science JP25K22300
• Japan Society for the Promotion of Science JPJSBP120249003
• Japan Science and Technology Agency CREST JPMJCR25A
• Japan Association for Chemical Innovation JACI Prize for Outstanding Achievements
• Japan Society for the Promotion of Science JP23K23178
• Japan Society for the Promotion of Science JP24H01198
• Japan Society for the Promotion of Science JP24K01279

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/cptc.70316

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更新時刻: 2026-10-16 15:12:08 +0900

MDRでの公開時刻: 2026-10-19 12:32:28 +0900