[Cu15(PPh3)6(PET)13]2+: a Copper Nanocluster with Crystallization Enhanced Photoluminescence

Saidkhodzha Nematulloev, Ren Wu Huang, Jun Yin, Aleksander Shkurenko, Chunwei Dong, Atanu Ghosh, Badriah Alamer, Rounak Naphade, Mohamed Nejib Hedhili, Partha Maity, Mohamed Eddaoudi, Omar F. Mohammed, Osman M. Bakr

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

Due to their atomically precise structure, photoluminescent copper nanoclusters (Cu NCs) have emerged as promising materials in both fundamental studies and technological applications, such as bio-imaging, cell labeling, phototherapy, and photo-activated catalysis. In this work, a facile strategy is reported for the synthesis of a novel Cu NCs coprotected by thiolate and phosphine ligands, formulated as [Cu15(PPh3)6(PET)13]2+, which exhibits bright emission in the near-infrared (NIR) region (≈720 nm) and crystallization-induced emission enhancement (CIEE) phenomenon. Single crystal X-ray crystallography shows that the NC possesses an extraordinary distorted trigonal antiprismatic Cu6 core and a, unique among metal clusters, “tri-blade fan”-like structure. An in-depth structural investigation of the ligand shell combined with density functional theory calculations reveal that the extended C-H···π and π-π intermolecular ligand interactions significantly restrict the intramolecular rotations and vibrations and, thus, are a major reason for the CIEE phenomena. This study provides a strategy for the controllable synthesis of structurally defined Cu NCs with NIR luminescence, which enables essential insights into the origins of their optical properties.

Original languageEnglish
Article number2006839
JournalSmall
Volume17
Issue number27
DOIs
Publication statusPublished - 8 Jul 2021

Keywords

  • copper nanoclusters
  • crystallization-induced emission enhancement
  • near-infrared luminescence
  • single crystals

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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