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Single-molecule magnet behavior in 2,2'-bipyrimidine-bridged dilanthanide complexes.

ABSTRACT: A series of 2,2'-bipyrimidine-bridged dinuclear lanthanide complexes with the general formula [Ln(tmhd)3]2bpm (tmhd = 2,2,6,6-tetramethyl-3,5-heptanedionate, bpm = 2,2'-bipyrimidine, Ln = Gd(III), 1; Tb(III), 2; Dy(III), 3; Ho(III), 4 and Er(III), 5) has been synthesized and characterized. Sublimation of [Tb(tmhd)3]2bpm onto a Au(111) surface leads to the formation of a homogeneous film with hexagonal pattern, which was studied by scanning tunneling microscopy (STM). The bulk magnetic properties of all complexes have been studied comprehensively. The dynamic magnetic behavior of the Dy(III) and Er(III) compounds clearly exhibits single molecule magnet (SMM) characteristics with an energy barrier of 97 and 25 K, respectively. Moreover, micro-SQUID measurements on single crystals confirm their SMM behavior with the presence of hysteresis loops.

SUBMITTER: Yu W

PROVIDER: S-EPMC4734418 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature

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Single-molecule magnet behavior in 2,2'-bipyrimidine-bridged dilanthanide complexes.

Yu Wen W Schramm Frank F Pineda Eufemio Moreno EM Lan Yanhua Y Fuhr Olaf O Chen Jinjie J Isshiki Hironari H Wernsdorfer Wolfgang W Wulfhekel Wulf W Ruben Mario M

Beilstein journal of nanotechnology 20160128

A series of 2,2'-bipyrimidine-bridged dinuclear lanthanide complexes with the general formula [Ln(tmhd)3]2bpm (tmhd = 2,2,6,6-tetramethyl-3,5-heptanedionate, bpm = 2,2'-bipyrimidine, Ln = Gd(III), 1; Tb(III), 2; Dy(III), 3; Ho(III), 4 and Er(III), 5) has been synthesized and characterized. Sublimation of [Tb(tmhd)3]2bpm onto a Au(111) surface leads to the formation of a homogeneous film with hexagonal pattern, which was studied by scanning tunneling microscopy (STM). The bulk magnetic properties ...[more]

PMID: 26925361

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