Slow Magnetic Relaxation in Silver(II) Macrocyclic Systems
Joan Serra,
Mercè Font-Bardia,
Albert Escuer
et al.
Abstract:The spin–lattice relaxation time has been studied
trough
alternating-current susceptometry and ultralow-frequency Raman spectroscopy
in a family of silver(II)-derived molecular systems with spin 1/2 and formulas [AgII(m-CTH)(NO3)2] (1) and [AgII(m-CTH)(ClO4)2] (2), where CTH = meso-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane.
The combination of both techniques demonstrates the occurrence of
slow spin magnetic relaxation induced by spin–phonon interaction.
The magnetic behavior of these silver(I… Show more
“…The past thirty years have witnessed great efforts and significant progress in the research of single-molecule magnets (SMMs or called single-ion magnets (SIMs) for mononuclear complexes), driven primarily by the envisioned applications of such molecule-based materials for high-density storage and quantum processing of information. 1–4 Metal ions with unpaired electrons including those of the transition metals 5–7 and the f-elements 8–15 have been applied as spin centers for SMMs. Of particular note are Dy( iii )-containing SMMs with which large energy barriers over 1800 K 16–20 and high blocking temperatures up to 80 K 18,19 have been achieved.…”
Herein the synthesis, structural characterization, and magnetic properties of a Pr(IV) complex [Pr(OSiPh3)4(L)] (1, L = 4,4’-dimethoxy-2,2’-bipyridine) are reported. The stability of the Pr(IV) complex has been significantly enhanced with...
“…The past thirty years have witnessed great efforts and significant progress in the research of single-molecule magnets (SMMs or called single-ion magnets (SIMs) for mononuclear complexes), driven primarily by the envisioned applications of such molecule-based materials for high-density storage and quantum processing of information. 1–4 Metal ions with unpaired electrons including those of the transition metals 5–7 and the f-elements 8–15 have been applied as spin centers for SMMs. Of particular note are Dy( iii )-containing SMMs with which large energy barriers over 1800 K 16–20 and high blocking temperatures up to 80 K 18,19 have been achieved.…”
Herein the synthesis, structural characterization, and magnetic properties of a Pr(IV) complex [Pr(OSiPh3)4(L)] (1, L = 4,4’-dimethoxy-2,2’-bipyridine) are reported. The stability of the Pr(IV) complex has been significantly enhanced with...
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