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A series of 3d–4f heterometallic complexes, namely [Ln2Co2(2,3‐DCB)10(phen)2] [Ln=Nd (1), Sm (2), Eu (3), Gd (4), Tb (5), Dy (6), Er (7)], were obtained through the self‐assembly reactions of Ln(NO3)3 ⋅ nH2O, Co(NO3)2 ⋅ 6H2O, 2,3‐dichlorobenzoic acid (2,3‐HDCB), NaOH and 1,10‐phenanthroline (phen) under solvothermal conditions. Their crystal structures were determined by single‐crystal X‐ray diffraction. They were also characterized by elemental analysis, FT‐IR, powder X‐ray diffraction (PXRD) and thermogravimetric analysis (TGA) and differential thermoanalysis (DTA). These seven complexes have the same molecular formula but different crystal structures. Complexes 1–3, 4 and 5 as well as 6 and 7 are crystallographically isomorphous, respectively. They all exhibit zero‐dimensional (0D) linear tetranuclear cluster structures. These 0D linear tetranuclear clusters can be further connected into a two‐dimensional (2D) supramolecular network via the extensive intermolecular π–π interactions between 2,3‐DCB and phen. The photoluminescent properties of 3, 5 and 6 and the magnetic properties of 1–2 and 4–7 were investigated. Complex 6 shows a slow magnetic relaxation behavior. [ABSTRACT FROM AUTHOR]

A new Dy2-dimer-based two-dimensional network Dy(L)(HL)(phen) (1-Dy) has been synthesized by a hydrothermal method. 1-Dy displays an obvious single-molecule magnet (SMM) behavior with a high Ueff value of approximately 160 K under a zero dc field. [ABSTRACT FROM AUTHOR]

Two sorts of 2,4-dichlorobenzoate-based lanthanide coordination polymers tuned by 4,4′-bipyridine have been successfully synthesized and structurally characterized. Their photoluminescent and magnetic properties have been investigated. • Eight 2,4-dichlorobenzoate-based lanthanide coordination polymers tuned by 4,4′-bipyridine are prepared. • The Eu/Tb(III)-containing coordination polymers exhibit the photoluminescent properties. • A Dy(III)-containing coordination polymer shows a slow magnetic relaxation behavior. Ln(NO 3) 3 · n H 2 O reacted with 2,4-dichlorobenzoic acid (2,4-HDCB) and NaOH under solvothermal conditions of water and ethanol to yield four lanthanide-organic coordination polymers (CPs) [Eu(2,4-DCB) 3 (CH 3 CH 2 OH) 2 (1) and [Ln(2,4-DCB) 3 (H 2 O)] [Ln = Gd (2), Tb (3), Dy (4)]. The second ligand 4,4′-bipyridine (4,4′-bpy) was introduced into the above reaction systems to provide four new lanthanide-organic CPs [Ln 2 (2,4-DCB) 6 (4,4′-bpy)(H 2 O) 2 [Ln = Eu (5), Gd (6), Tb (7), Dy (8)]. Single-crystal and powder X-ray diffraction analyses reveal that CPs 1 and 2 possess similar one-dimensional (1D) structures, and CPs 2 – 4 and 5 – 8 are isostructural, respectively. In 1 – 4 , the 2,4-DCB anions bridge the Ln(III) ions to form a 1D chain. In 5 – 8 , six 2,4-DCB anions link two Ln(III) ions into a binuclear Ln 2 (2,4-DCB) 6 unit, and the Ln 2 (2,4-DCB) 6 units are further connected by the 4,4′-bpy co-ligands to generate a 1D chain. The photoluminescent and magnetic properties of 1 – 8 were investigated. [ABSTRACT FROM AUTHOR]

A new Dy2-dimer-based two-dimensional network Dy(L)(HL)(phen) (1-Dy) has been synthesized by a hydrothermal method. 1-Dy displays an obvious single-molecule magnet (SMM) behavior with a high Ueff value of approximately 160 K under a zero dc field.

Three series of copper-lanthanide/lanthanide coordination polymers (CPs) Ln(III) Cu(II) Cu(I) (bct)3 (H2 O)2 [Ln=La (1), Ce (2), Pr (3), Nd (4), Sm (5), Eu (6), Gd (7), Tb (8), Dy (9), Er (10), Yb (11), and Lu (12), H2 bct=2,5-bis(carboxymethylmercapto)-1,3,4-thiadiazole acid], Ln(III) Cu(I) (bct)2 [Ln=Ce (2 a), Pr (3 a), Nd (4 a), Sm (5 a), Eu (6 a), Gd (7 a), Tb (8 a), Dy (9 a), Er (10 a), Yb (11 a), and Lu (12 a)], and Ln(III) 2 (bct)3 (H2 O)5 [Ln=La (1 b), Ce (2 b), Pr (3 b), Nd (4 b), Sm (5 b), Eu (6 b), Gd (7 b), Tb (8 b), and Dy (9 b)] have been successfully constructed under hydrothermal conditions by modulating the reaction time. Structural characterization has revealed that CPs 1-12 possess a unique one-dimensional (1D) strip-shaped structure containing two types of double-helical chains and a double-helical channel. CPs 2 a-12 a show a three-dimensional (3D) framework formed by Cu(I) linking two types of homochiral layers with double-helical channels. CPs 1 b-9 b exhibit a 3D framework with single-helical channels. CPs 6 b and 8 b display visible red and green luminescence of the Eu(III) and Tb(III) ions, respectively, sensitized by the bct ligand, and microsecond-level lifetimes. CP 8 b shows a rare magnetic transition between short-range ferromagnetic ordering at 110 K and long-range ferromagnetic ordering below 10 K. CPs 9 a and 9 b display field-induced single-chain magnet (SCM) and/or single-molecule magnet (SMM) behaviors, with Ueff values of 51.7 and 36.5 K, respectively., (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)