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Synthesis, crystal structures, luminescence and magnetic property of two complexes based on 5-nitroisophthalic acid
Ist Teil von
Transition metal chemistry (Weinheim), 2022-01, Vol.47 (1), p.11-18
Ort / Verlag
Cham: Springer International Publishing
Erscheinungsjahr
2022
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Based on 5-nitroisophthalic acid (5-H
2
nip) and bis(4-pyridyl)amine (dpa), the complexes {[Cd
6
(5-nip)
6
(dpa)
4
]·EtOH}
n
(
1
) and [Co
5
(5-nip)
2
(dpa)
2
(OH)
2
(SO
4
)
2
(H
2
O)
2
]
n
(
2
) have been synthesized and characterized by elemental analysis, single-crystal X-ray diffraction, IR spectroscopy, thermal gravimetry analysis, fluorescence and magnetic susceptibility. The carboxylate groups of the 5-nip
2−
adopt three different bridging modes [
bis
(chelate-bidentate),
bis
(bidentate) and
bis
(monodentate)]. The 5-nip
2−
anions and dpa play as linkers, which connect Cd(II) or Co(II) ions to form the three-dimensional structures of
1
and
2
. Moreover,
1
exhibits intense solid-state luminescence emissions centered at 402 nm at room temperature, which mainly originates from the intraligand
π
–
π*
transitions of 5-nip
2−
. Magnetic susceptibility measurement indicates that
2
shows antiferromagnetic interactions between the Co(II) ions.