A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability

Xiaozhou Ma; Elizaveta A. Suturina; Siddhartha De; Philippe Négrier; Mathieu Rouzières; Rodolphe Clérac; Pierre Dechambenoit

doi:10.1002/anie.201803842

A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability

Xiaozhou Ma, Elizaveta A. Suturina, Siddhartha De, Philippe Négrier, Mathieu Rouzières, Rodolphe Clérac, Pierre Dechambenoit

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

49 Citations (SciVal)

Abstract

A dinuclear Co^II complex, [Co₂(tphz)(tpy)₂]ⁿ⁺ (n=4, 3 or 2; tphz: tetrapyridophenazine; tpy: terpyridine), has been assembled using the redox-active and strongly complexing tphz bridging ligand. The magnetic properties of this complex can be tuned from spin-crossover with T_1/2≈470 K for the pristine compound (n=4) to single-molecule magnet with an S_T=5/2 spin ground state when once reduced (n=3) to finally a diamagnetic species when twice reduced (n=2). The two successive and reversible reductions are concomitant with an increase of the spin delocalization within the complex, promoting remarkably large magnetic exchange couplings and high-spin species even at room temperature.

Original language	English
Pages (from-to)	7841-7845
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	57
Issue number	26
Early online date	30 Apr 2018
DOIs	https://doi.org/10.1002/anie.201803842
Publication status	Published - 25 Jun 2018

Keywords

molecular magnetism
multiswitchability
non-innocent ligands
radicals
spin delocalization

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1002/anie.201803842

Cite this

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title = "A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability",

abstract = "A dinuclear CoII complex, [Co2(tphz)(tpy)2]n+ (n=4, 3 or 2; tphz: tetrapyridophenazine; tpy: terpyridine), has been assembled using the redox-active and strongly complexing tphz bridging ligand. The magnetic properties of this complex can be tuned from spin-crossover with T1/2≈470 K for the pristine compound (n=4) to single-molecule magnet with an ST=5/2 spin ground state when once reduced (n=3) to finally a diamagnetic species when twice reduced (n=2). The two successive and reversible reductions are concomitant with an increase of the spin delocalization within the complex, promoting remarkably large magnetic exchange couplings and high-spin species even at room temperature.",

keywords = "molecular magnetism, multiswitchability, non-innocent ligands, radicals, spin delocalization",

author = "Xiaozhou Ma and Suturina, {Elizaveta A.} and Siddhartha De and Philippe N{\'e}grier and Mathieu Rouzi{\`e}res and Rodolphe Cl{\'e}rac and Pierre Dechambenoit",

year = "2018",

month = jun,

day = "25",

doi = "10.1002/anie.201803842",

language = "English",

volume = "57",

pages = "7841--7845",

journal = "Angewandte Chemie - International Edition",

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publisher = "WILEY-V C H VERLAG GMBH",

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TY - JOUR

T1 - A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability

AU - Ma, Xiaozhou

AU - Suturina, Elizaveta A.

AU - De, Siddhartha

AU - Négrier, Philippe

AU - Rouzières, Mathieu

AU - Clérac, Rodolphe

AU - Dechambenoit, Pierre

PY - 2018/6/25

Y1 - 2018/6/25

N2 - A dinuclear CoII complex, [Co2(tphz)(tpy)2]n+ (n=4, 3 or 2; tphz: tetrapyridophenazine; tpy: terpyridine), has been assembled using the redox-active and strongly complexing tphz bridging ligand. The magnetic properties of this complex can be tuned from spin-crossover with T1/2≈470 K for the pristine compound (n=4) to single-molecule magnet with an ST=5/2 spin ground state when once reduced (n=3) to finally a diamagnetic species when twice reduced (n=2). The two successive and reversible reductions are concomitant with an increase of the spin delocalization within the complex, promoting remarkably large magnetic exchange couplings and high-spin species even at room temperature.

AB - A dinuclear CoII complex, [Co2(tphz)(tpy)2]n+ (n=4, 3 or 2; tphz: tetrapyridophenazine; tpy: terpyridine), has been assembled using the redox-active and strongly complexing tphz bridging ligand. The magnetic properties of this complex can be tuned from spin-crossover with T1/2≈470 K for the pristine compound (n=4) to single-molecule magnet with an ST=5/2 spin ground state when once reduced (n=3) to finally a diamagnetic species when twice reduced (n=2). The two successive and reversible reductions are concomitant with an increase of the spin delocalization within the complex, promoting remarkably large magnetic exchange couplings and high-spin species even at room temperature.

KW - molecular magnetism

KW - multiswitchability

KW - non-innocent ligands

KW - radicals

KW - spin delocalization

UR - http://www.scopus.com/inward/record.url?scp=85048773496&partnerID=8YFLogxK

U2 - 10.1002/anie.201803842

DO - 10.1002/anie.201803842

M3 - Article

AN - SCOPUS:85048773496

SN - 1433-7851

VL - 57

SP - 7841

EP - 7845

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 26

ER -

A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability

Abstract

Keywords

ASJC Scopus subject areas

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Elizaveta Suturina

High Performance Computing (HPC) Facility

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A Redox-Active Bridging Ligand to Promote Spin Delocalization, High-Spin Complexes, and Magnetic Multi-Switchability

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

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Fingerprint

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Elizaveta Suturina

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High Performance Computing (HPC) Facility

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