Dual-Property Supramolecular H-Bonded 15-Crown-5 Ln(III) Chains: Joint Magneto-Luminescence and ab Initio Studies
authors Al Hareri, M; Ali, ZR; Regier, J; Gavey, EL; Carlos, LD; Ferreira, RAS; Pilkington, M
nationality International
journal INORGANIC CHEMISTRY
keywords SINGLE-MOLECULE MAGNETS; ION MAGNET; SLOW RELAXATION; CROWN-ETHERS; DY-III; ANISOTROPY; COMPLEXES; SYMMETRY; MAGNETIZATION; TEMPERATURE
abstract Two complexes comprising 9-coordinate capped square antiprismatic [Ln(NO3)(3)(OH2)(2)(MeOH)] units [Ln(III) Dy 6; Tb 7] are reported in which the metal complexes are hydrogen-bonded to 15C5 (15-crown-5) macrocydes to form supramolecular chains, {[Ln(NO3)(3) (OH2)(2)(MeOH)] (15C5)}(n). Alternating current magnetic susceptibility measurements supported by ab initio studies show field-induced SMM (single molecule magnet) behavior for 6, but rapid relaxation of the magnetization for 7. because of the presence of dominant quantum tunneling processes as evidenced by the presence of a significant calculated tunnel splitting within the ground-state multiplet. Modeling the high-resolution emission spectra for 6 afforded energies of 37 +/- 5 and 28 +/- 5 cm(-1) for the first-excited-state Stark sublevels of the two crystallographically independent Dy1 and Dy2 ions, in excellent agreement with the calculated values of 31 and 21 cm(-1) for Delta E-1 derived from ab initio studies.
publisher AMER CHEMICAL SOC
issn 0020-1669
isbn 1520-510X
year published 2017
volume 56
issue 13
beginning page 7344
ending page 7353
digital object identifier (doi) 10.1021/acsinorgchem.7b00089
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000405056400008
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 4.700
5 year journal impact factor 4.513
category normalized journal impact factor percentile 90.000
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg