Rational Construction of Layered Two-Dimensional Conjugated Metal-Organic Frameworks with Room-Temperature Quantum...

Area of Science:

• Materials Science
• Quantum Computing
• Chemistry

Background:

• Two-dimensional conjugated metal-organic frameworks (2D c-MOFs) are promising quantum materials with tunable properties.
• Achieving long spin relaxation times at room temperature in 2D c-MOFs using bottom-up design remains a challenge.

Purpose of the Study:

• To develop a bottom-up design strategy for creating 2D c-MOFs with enhanced spin properties for quantum applications.
• To investigate the spin dynamics and temperature dependence of quantum phenomena in the designed 2D c-MOFs.

Main Methods:

• Design of a hexahydroxytrithiatruxene (HHTH) ligand to minimize nuclear spin influence and weaken d-π conjugation.
• Synthesis and characterization of the resulting Ni3HHTH2 2D c-MOFs.
• Experimental studies of spin dynamics, including quantum coherence and Rabi oscillations at room temperature.

Main Results:

• The designed Ni3HHTH2 2D c-MOFs exhibit quantum coherence and Rabi oscillations at room temperature.
• An unusual temperature-dependent Rabi frequency was observed in Ni3HHTH2.
• Coordination mode was found to influence spin-lattice relaxation via spin-phonon coupling.

Conclusions:

• The developed HHTH ligand and Ni3HHTH2 material provide a viable strategy for preserving spin centers in 2D c-MOFs.
• These findings offer a general guideline for designing high-performance quantum qubits based on 2D spin arrays.