In:
Dalton Transactions, Royal Society of Chemistry (RSC), Vol. 52, No. 34 ( 2023), p. 11913-11921
Abstract:
Polymorphic layered lanthanide coordination polymers provide opportunities to study the effect of intralayer and interlayer interactions on their magnetic dynamics. Herein we report a series of layered lanthanide phosphonates, namely, α-Ln(2-qpH)(SO 4 )(H 2 O) 2 (Ln = Sm) (α-Ln), β-Ln(2-qpH)(SO 4 )(H 2 O) 2 (Ln = Pr, Nd, Sm) (β-Ln) and γ-Ln(2-qpH)(SO 4 )(H 2 O) 2 (Ln = La, Ce, Pr, Nd, Sm) (γ-Ln) (2-qpH 2 = 2-quinolinephosphonic acid), which crystallize in monoclinic P 2 1 / c (α-Ln), triclinic P 1̄ (β-Ln) and orthorhombic Pbca (γ-Ln) space groups, respectively. The structural differences between the β- and γ-phases lie not only in the intralayer but also in the interlayer. Within the layers, the Ln 2 O 2 dimers are aligned parallel in the β-phase, but are non-parallel in the γ-phase. In the interlayer, there are π–π interactions between the quinoline groups in the α- and β-phases but not in the γ-phase. Magnetic studies reveal a field-induced slow relaxation of the magnetisation at low temperatures for compounds γ-Ce, β-Nd, and γ-Nd, and the impact of polymorphism on the magnetic dynamics of Nd( iii ) compounds is discussed.
Type of Medium:
Online Resource
ISSN:
1477-9226
,
1477-9234
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
1472887-4
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