Volume 137, Issue 8 e202420257
Forschungsartikel

Unexpected Magnetic Moments in Manganese-Doped (CdSe)13 Nanoclusters: Role of Ligands

Guo-Lun Huang

Guo-Lun Huang

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

These authors contributed equally.

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Ko.-Yu Ting

Ko.-Yu Ting

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

These authors contributed equally.

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Dr. Nagaraju Narayanam

Dr. Nagaraju Narayanam

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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Dong-Rong Wu

Dong-Rong Wu

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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Tzung-En Hsieh

Tzung-En Hsieh

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

Department of Interface Design, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Berlin, 12489 Germany

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Kai-Chih Tsai

Kai-Chih Tsai

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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Da-Wei Yang

Da-Wei Yang

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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Qi-Xun Tang

Qi-Xun Tang

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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Bo-Kai Su

Bo-Kai Su

Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, 80424 Taiwan, ROC

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Yu-Ting Kang

Yu-Ting Kang

Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, 80424 Taiwan, ROC

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Shing-Jong Huang

Shing-Jong Huang

Department of Chemistry, National Taiwan University, Taipei, 10617 Taiwan, ROC

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Ching-Hsiang Chen

Ching-Hsiang Chen

Sustainable Energy Development Center, National Taiwan University of Science & Technology, Taipei, 10673 Taiwan, ROC

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Yuan-Pin Chang

Yuan-Pin Chang

Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, 80424 Taiwan, ROC

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Lan-Sheng Yang

Lan-Sheng Yang

Department of Physics, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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Yu-Chiang Chao

Yu-Chiang Chao

Department of Physics, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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Prof. Dr. Elise Yu-Tzu Li

Corresponding Author

Prof. Dr. Elise Yu-Tzu Li

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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Prof. Dr. Yi-Hsin Liu

Corresponding Author

Prof. Dr. Yi-Hsin Liu

Department of Chemistry, National Taiwan Normal University, Taipei, 11677 Taiwan, ROC

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First published: 06 December 2024

Abstract

This study explores the enhancement in magnetic and photoluminescence properties of Mn2+-doped (CdSe)13 nanoclusters, significantly influenced by the introduction of paramagnetic centers through doping, facilitated by optimized precursor chemistry and precisely controlled surface ligand interactions. Using a cost-effective and scalable synthesis approach with elemental Se and NaBH4 (Se-NaBH4) in n-octylamine, we tailored bonding configurations (Cd−O, Cd−N, and Cd−Se) on the surface of nanoclusters, as confirmed by EXAFS analysis. These bonding configurations allowed for tunable Mn2+-doping with tetrahedral coordination, further stabilized by hydrogen-bonded acetate ligands, as evidenced by 13C NMR and IR spectroscopy. Mulliken charge analysis indicates that the charge redistribution on Se2− suggests electron transfer between surface ligands and the nanocluster, contributing to spin fluctuations. These tailored configurations markedly increased the nanoclusters′ magnetic susceptibility and photoluminescence efficiency. The resulting nanoclusters demonstrated a clear concentration-dependent response in emission lifetimes and intensities upon exposure to magnetic field effects (MFE) and spin-spin coupling, alongside a large magnetic moment exceeding 40 μB at 180 K. These findings highlight the potential of these nanoclusters for magneto-optical devices and spintronic applications, showcasing their tunable magnetic properties and exciton dynamics.

Conflict of Interests

The authors declare no competing financial interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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