Synthesis, crystal structure, optical properties and bactericidal activity of a new organic-inorganic hybrid: Benzyl triethylaminium tetrachloromanganate(II)

Abstract

In this work, a lead-free organic-inorganic hybrid crystal with dual functions of green-emission and bactericidal activity, benzyl triethylaminium tetrachloromanganate(II) ([BzTEA]₂[MnCl₄]), was synthesized by the slow evaporation solution growth technology and characterized by single-crystal and power X-ray diffraction, IR spectrum, Scanning Electron microscopy, and PL spectrum. The compound crystallized in the monoclinic space group P2₁/c. The thermal study revealed that the material showed good thermal stability and can be used for applications below 222.1 °C. The material had excellent optical properties as it fluoresced green under 350 nm UV light. The compound exhibited favorable bactericidal activity against Staphylococcus aureus and Escherichia coli.

Graphical abstract

Research Highlights

1. An inorganic-organic hybrid salt [BzTEA]₂[MnCl₄] was synthesized and characterized.

2. The salt shows green fluorescence emission at 534 nm in a solid state at room temperature.

3. The salt exhibited favorable thermal stability and could be used in applications below 222.1 °C.

4. The salt had an optical band gap of 1.66 eV and was a typical semiconductor material with good optical properties.

5. The as-synthesized salt exhibits good antibacterial activities against S. aureus and E. coli.

Keywords:

• Antibacterial activities
• crystal structure
• fluorescence
• organic-inorganic hybrid
• tetrachloromanganate(II)

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in the present paper.

Additional information

Funding

This work was supported by the Science and Technology Project (No. 2016A010103025) from Guangdong Science and Technology Department, and the undergraduates’ innovative training program (No. 2023105641081) from South China Agricultural University.