Affordable Access

Publisher Website

Luminescent [CO2@Ag20(SAdm)10(CF3COO)10(DMA)2] nanocluster: synthetic strategy and its implication towards white light emission.

  • Biswas, Sourav1
  • Das, Anish Kumar1
  • Sardar, Avirup1
  • Manna, Surya Sekhar2
  • Mondal, Pradip Kumar3
  • Polentarutti, Maurizio3
  • Pathak, Biswarup2
  • Mandal, Sukhendu1
  • 1 School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695551, India. [email protected]. , (India)
  • 2 Department of Chemistry, Indian Institute of Technology Indore, Madhya Pradesh 453552, India. , (India)
  • 3 Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, Basovizza, Trieste 34149, Italy. , (Italy)
Published Article
The Royal Society of Chemistry
Publication Date
Apr 24, 2023
DOI: 10.1039/d3nr01107k
PMID: 37092574


Owing to the quantized size and associated discrete energy levels, atomically precise silver nanoclusters (Ag NCs) hold great potential for designing functional luminescent materials. However, the thermally activated non-radiative transition of Ag(I)-based NCs has faded the opportunities. To acquire the structurally rigid architecture of cluster nodes for constraining such transitions, a new synthetic approach is unveiled here that utilizes a neutral template as a cluster-directing agent to assemble twenty Ag(I) atoms that ensure the maximum number of surface-protecting ligand attachment possibilities in a particular solvent medium. The solvent polarity triggers the precise structural design to circumvent the over-reliance of the templates, which results in the formation of [CO2@Ag20(SAdm)10(CF3COO)10(DMA)2] NC (where SAdm = 1-adamantanethiolate and DMA = N,N-dimethylacetamide) exhibiting an unprecedented room-temperature photoluminescence emission. The high quantum yield of the generated blue emission ensures its candidature as an ideal donor for artificial light-harvesting system design, and it is utilized with the two-step sequential energy transfer process, which finally results in the generation of ideal white light. For implementing perfect white light emission, the required chromophores in the green and red emission regions were chosen based on their effective spectral overlap with the donor components. Due to their favorable energy-level distribution, excited state energy transfers occurred from the NC to β-carotene at the initial step, then from the conjugate of the NC and β-carotene to another chromophore, Nile Blue, at the second step via a sequential Förster resonance energy transfer pathway.

Report this publication


Seen <100 times