Amending the anisotropy barrier and luminescence behavior of heterometallic trinuclear linear [M(II) -Ln(III) -M(II) ] (Ln(III) =Gd, Tb, Dy; M(II) =Mg/Zn) complexes by change from divalent paramagnetic to diamagnetic metal ions

Chemistry : a European Journal
Sourav DasVadapalli Chandrasekhar

Abstract

The sequential reaction of a multisite coordinating compartmental ligand [2-(2-hydroxy-3-(hydroxymethyl)-5-methylbenzylideneamino)-2-methylpropane-1,3-diol] (LH4 ) with appropriate lanthanide salts followed by the addition of [Mg(NO3 )2 ]⋅6 H2 O or [Zn(NO3 )2 ]⋅6 H2 O in a 4:1:2 stoichiometric ratio in the presence of triethylamine affords a series of isostructural heterometallic trinuclear complexes containing [Mg2 Ln](3+) (Ln=Dy, Gd, and Tb) and [Zn2 Ln](3+) (Ln=Dy, Gd, and Tb) cores. The formation of these complexes is demonstrated by X-ray crystallography as well as ESI-MS spectra. All complexes are isostructural possessing a linear trimetallic core with a central lanthanide ion. The comprehensive studies discussed involve the synthesis, structure, magnetism, and photophysical properties on this family of trinuclear [Mg2 Ln](3+) and [Zn2 Ln](3+) heterometallic complexes. [Mg2 Dy](3+) and [Zn2 Dy](3+) show slow relaxation of the magnetization below 12 K under zero applied direct current (dc) field, but without reaching a neat maximum, which is due to the overlapping with a faster quantum tunneling relaxation mediated through dipole-dipole and hyperfine interactions. Under a small applied dc field of 1000 Oe, the quantum tunn...Continue Reading

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Citations

Jan 6, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·He-Rui WenCai-Ming Liu
Jul 2, 2016·Chemical Communications : Chem Comm·Tulika Gupta, Gopalan Rajaraman
Oct 18, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Amit ChakrabortyVadapalli Chandrasekhar
Jun 21, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Amit ChakrabortyVadapalli Chandrasekhar
Jul 23, 2019·Chemistry, an Asian Journal·Atanu DeyVadapalli Chandrasekhar
Oct 9, 2019·The British Journal of Social Psychology·Simon M BuryLydia Woodyatt
Jul 22, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Pragya ShuklaMaheswaran Shanmugam
Jun 14, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Hongshan KeSanping Chen
Dec 1, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Matilde FondoCristina Nuñez
Jan 13, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Ahlem-Linda BoulkedidJoulia Larionova

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