A Series of Lanthanide–Germanate Oxo Clusters Decorated by 1,10-Phenanthroline Chromophores

Abstract

A series of lanthanide-germanate oxo clusters, [Ln(phen)Ge(μ-O)T(HO)]·2HO [Ln = Dy (1a) and Er (1b); T = -CHCHCOO group; phen = 1,10-phenanthroline], [Ln(phen)Ge(μ-O)T(HO)]·2phen·16HO [Ln = Sm (2a), Eu (2b), and Gd (2c)], and [Ho(phen)Ge(μ-O)T(HO)]·2phen·13HO (3), have been hydrothermally synthesized from the reactions of bis(carboxyethylgermanium sesquioxide) and LnO with auxiliary phen chromophores. Compounds 1a and 1b consist of cage clusters [Ln(phen)Ge(μ-O)T(HO)] and free HO molecules, where cage clusters are arranged in a CsCl type, while compounds 2a-2c consist of cage clusters [Ln(phen)Ge(μ-O)T(HO)], free phen, and free HO molecules, where cage clusters are arranged in a NaCl type. Compound 3 consists of the one-dimensional neutral chain [Ho(phen)Ge(μ-O)T(HO)] and free HO molecules. These compounds provide the first examples of p-f heterometallic [Ge-O-Ln] oxo clusters decorated by phen chromophores. The photoluminescent and magnetic properties of all compounds have been investigated.

Synthesis, crystal structures and magnetic properties of two heterometallic {Ln8Cr4} (Ln = Gd3+ and Tb3+) complexes with one-dimensional wave chain structure

“…27,32 Further, the bond angles around O-Cr-O and O-Gd-O, respectively, varying from 83.34 (18) to 179.30 (17) and 51.43 (17) to 148.96 (14) (Table S2 †). 33 In comparison with the previously reported hexanuclear {Ln 4 Cr 2 } clusters by Zhai et al in 2018, 31a which has the same metal skeleton {Ln 4 Cr 2 } as the compound we obtained. However, the reported {Ln 4 Cr 2 } cluster is composed of two symmetryrelated units {Ln 2 Cr}, then is further linked together by sulfate ions, resulting in a 3D framework.…”

Two Pairs of Chiral “Tower‐Like” Ln4Cr4 (Ln=Gd, Dy) Clusters: Syntheses, Structure, and Magnetocaloric Effect

“…Adjacent [Gd 4 Cr 4 ] clusters connected with each other through C−H⋅⋅⋅O hydrogen bonds and finally yield a 3D hydrogen‐bonded structure (Figure S2 in the Supporting Information). Furthermore, intramolecular π–π interactions (3.7369 Å) of ligands in compound 1 can be beneficial to the stabilization of the compounds during the synthesis process (Figure S4 in the Supporting Information). Similarly, there also exists hydrogen bonds in compound 2 (Table S3 in the Supporting Information), which raises the entire compound into a 3D structure.…”

“…CCDC 1846606-1846609 contain the supplementary crystallographic data for this paper.T hese data are provided free of charge by The Cambridge Crystallographic Data Centre. 296(2) 296(2)296(2)296(2) crystal system orthorhombicorthorhombic orthorhombicorthorhombic space group P2 1 2 1 2 1 P2 1 2 1 2 1 P2 1 2 1 2 1 P2 1 2 1 2 1 a [] 17.3933(13) 17.501 (4) (16) 23.670 (5)21.631 (7) 23.90 (4) c []25.6829 (19) 24.031 (6) Chem.E ur.J.2018, 24,15295 -15302 www.chemeurj.org…”

Radical-Triggered Chemiluminescence of Phenanthroline Derivatives: An Insight into Radical–Aromatic Interaction

“…2,6 Phenanthroline-based compounds show high electron mobility 7 and have been used as energy-transfer reagents. 8,9…”