Improving the molecular spin qubit performance in zirconium MOF composites by mechanochemical dilution and fullerene encapsulation

Vujević, Lucija; Karadeniz, Bahar; Cindro, Nikola; Krajnc, Andraž; Mali, Gregor; Mazaj, Matjaž; Avdoshenko, Stanislav M.; Popov, Alexey A.; Žilić, Dijana; Užarević, Krunoslav; Ilakovac Kveder, Marina (2023) Improving the molecular spin qubit performance in zirconium MOF composites by mechanochemical dilution and fullerene encapsulation. Chemical science, 14 (35). pp. 9389-9399. ISSN 2041-6520

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Abstract

Enlarging the quantum coherence times and gaining control over quantum effects in real systems are fundamental for developing quantum technologies. Molecular electron spin qubits are particularly promising candidates for realizing quantum information processing due to their modularity and tunability. Still, there is a constant search for tools to increase their quantum coherence times. Here we present how the mechanochemical introduction of active spin qubits in the form of 10% diluted copper(II)-porphyrins in the diamagnetic PCN-223 and MOF-525 zirconium-MOF polymorph pair can be achieved. Furthermore, the encapsulation of fullerene during the MOF synthesis directs the process exclusively toward the rare PCN-223 framework with a controllable amount of fullerene in the framework channels. In addition to the templating role, the incorporation of fullerene increases the electron spin–lattice and phase-memory relaxation times, T1 and Tm. Besides decreasing the amount of nuclear spin-bearing solvent guests in the non-activated qubit frameworks, the observed improved relaxation times can be rationalized by modulating the phonon density of states upon fullerene encapsulation.

Item Type:	Article
Uncontrolled Keywords:	metal-organic frameworks ; MOF ; molecular spin qubit ; copper(II)-porphyrin ; EPR ; ESR ; coherence ; Rabi oscillations ; relaxation time
Subjects:	NATURAL SCIENCES > Physics NATURAL SCIENCES > Chemistry > Physical Chemistry
Divisions:	Division of Physical Chemistry
Projects:	Project title Project leader Project code Project type Studija važnosti spinskih međudjelovanja kao osnova za nove pristupe u istraživanju materijala-SPES Marina Ilakovac-Kveder IP-2018-01-3168 HRZZ Mehanokemijske i bezotopinske strategije za sintezu funkcionalnih poroznih materijala s naprednim fizičko-kemijskim i katalitičkim svojstvima-MECHADVANCE Krunoslav Užarević PZS-2019-02-4129 HRZZ
Depositing User:	Lucija Vujević
Date Deposited:	27 Sep 2023 11:10
URI:	http://fulir.irb.hr/id/eprint/8169
DOI:	10.1039/D3SC03089J

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