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Eight-Electron Copper Nanoclusters for Photothermal Conversion.

Xueli Sun¹, Bingzheng Yan¹, Xuekun Gong¹

¹College of Energy Materials and Chemistry, Inner Mongolia University, College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot, 010021, China.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|March 12, 2024

Summary

Atomically precise copper nanoclusters show promise for photothermal conversion. Novel [SCu54Cl12(tBuS)20(NO3)12] clusters exhibit efficient solar-driven heat generation, making them potent for solar energy applications.

Keywords:

copper eight electrons nanocluster photothermal conversion structure

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Area of Science:

Materials Science
Nanotechnology
Photochemistry

Background:

Atomically precise copper nanoclusters are gaining interest due to unique physicochemical properties.
There is an urgent need to explore novel applications for copper cluster nanomaterials.
Existing research highlights the potential of copper nanoclusters in various fields.

Purpose of the Study:

To synthesize and characterize novel copper nanoclusters with enhanced photothermal conversion properties.
To investigate the structural and electronic properties of the synthesized copper nanoclusters.
To evaluate the efficiency of these nanoclusters in converting light energy into heat, particularly under solar irradiation.

Main Methods:

One-pot synthesis of copper nanoclusters.
Characterization using ultraviolet-visible spectroscopy (UV-vis), electrospray ionization mass spectrometry (ESI-MS), and X-ray photoelectron spectroscopy (XPS).
Single crystal X-ray diffraction analysis (SCXRD) for structural determination.

Main Results:

Novel copper nanoclusters [XCu54Cl12(tBuS)20(NO3)12] (X=S or none) were successfully synthesized.
The molecular structure revealed a unique concentric three-shell Russian doll arrangement (X@Cu14@Cl12@Cu40).
The [SCu54Cl12(tBuS)20(NO3)12] cluster is the first eight-electron copper nanocluster stabilized by thiolates, exhibiting efficient photothermal conversion (71°C increase in ~50s) under blue light and simulated sunlight.

Conclusions:

The synthesized copper nanoclusters possess excellent photothermal conversion capabilities.
Their unique structure and electronic properties contribute to their high performance.
These nanoclusters demonstrate significant potential for solar energy utilization and other photothermal applications.