Molecularly "clicking" active moieties to germanium-based inorganic 2D materials

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Two-dimensional (2D) materials beyond graphene, such as germanene (2D-Ge), are crucial for advanced electronic and optical applications.
• Current fabrication methods for functionalizing 2D-Ge face limitations due to a restricted range of precursors, hindering versatile material design.

Purpose of the Study:

• To introduce a novel, versatile chemical strategy for the on-demand synthesis of functionalized 2D-Ge derivatives.
• To overcome the limitations of existing deintercalation methods for 2D-Ge functionalization.
• To enable the development of task-specific 2D-Ge materials with tunable physicochemical properties.

Main Methods:

• A "one-pot" synthetic strategy utilizing photoinduced thiol-ene click chemistry was employed.
• Commercially available allyl 2D-Ge (2D-Ge-CH2CH CH2) was covalently functionalized with thiol-rich molecular components (R -SH).

Main Results:

• The click chemistry approach successfully yielded functional 2D-Ge derivatives (2D-Ge-CH2CH2CH2S-R ).
• This method allows for the covalent assembly of diverse molecular components onto the 2D-Ge surface.
• The synthesized derivatives exhibit tunable (supra)molecular responsiveness.

Conclusions:

• The developed click chemistry method provides a versatile and innovative pathway for functionalizing germanene.
• This approach facilitates the creation of a new family of smart 2D-Ge materials with tailored properties.
• The strategy offers a universal method for the functionalization of 2D germanane, advancing the field beyond current limitations.