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A soft phosphorus atom to "harden" an erbium(iii) single-ion magnet.

ABSTRACT: Beyond the lanthanide organometallic single-ion magnet (SIM) (Cp*)Er(COT)¹ ([Cp*]^- = pentamethylcyclopentadienide; COT^2- = cyclooctatetraenide) that has a good performance, we managed to replace one coordinated carbon atom on the [Cp*]^- ring by a soft phosphorus atom and obtained (Dsp)Er(COT) (CCDC No. ; 1835955; Dsp^- = 3,4-dimethyl-2,5-bis(trimethylsilyl)phospholyl) whose sandwich structure is reported here for the first time. This substitution results in a remarkable change of magnetic dynamics. It exhibits slow magnetic relaxation under a zero applied direct current (DC) magnetic field with an energy barrier (?/k _B) of 358 K and magnetic hysteresis up to 9 K, both of which are higher than those of (Cp*)Er(COT). With the descended local symmetry of (Dsp)Er(COT), the energy barrier and blocking temperature (T _B) both improve unexpectedly and are among the highest ones in Er(iii)-based single-molecule magnets (SMMs).

SUBMITTER: Chen SM

PROVIDER: S-EPMC6180309 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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A soft phosphorus atom to "harden" an erbium(iii) single-ion magnet.

Chen Shi-Ming SM Xiong Jin J Zhang Yi-Quan YQ Yuan Qiong Q Wang Bing-Wu BW Gao Song S

Chemical science 20180804 38

Beyond the lanthanide organometallic single-ion magnet (SIM) (Cp*)Er(COT)1 ([Cp*]- = pentamethylcyclopentadienide; COT2- = cyclooctatetraenide) that has a good performance, we managed to replace one coordinated carbon atom on the [Cp*]- ring by a soft phosphorus atom and obtained (Dsp)Er(COT) (CCDC No. ; 1835955; Dsp- = 3,4-dimethyl-2,5-bis(trimethylsilyl)phospholyl) whose sandwich structure is reported here for the first time. This substitu ...[more]

PMID: 30319754

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