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

Xiao-Feng Tan; Jian Zhou; Hua-Hong Zou; Lianshe Fu; Qiuling Tang

doi:10.1021/acs.inorgchem.7b01271

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

Inorg Chem. 2017 Sep 5;56(17):10361-10369. doi: 10.1021/acs.inorgchem.7b01271. Epub 2017 Aug 23.

Authors

Xiao-Feng Tan¹, Jian Zhou¹, Hua-Hong Zou², Lianshe Fu³, Qiuling Tang¹

Affiliations

¹ Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University , Chongqing 401331, P. R. China.
² State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy, Guangxi Normal University , Guilin 541004, P. R. China.
³ Department of Physics and CICECO, Aveiro Institute of Materials, University of Aveiro , Aveiro 3810-193, Portugal.

PMID: 28832126
DOI: 10.1021/acs.inorgchem.7b01271

Abstract

A series of lanthanide-germanate oxo clusters, [Ln₈(phen)₂Ge₁₂(μ₃-O)₂₄T₁₂(H₂O)₁₆]·2H₂O [Ln = Dy (1a) and Er (1b); T = -CH₂CH₂COO^- group; phen = 1,10-phenanthroline], [Ln₈(phen)₂Ge₁₂(μ₃-O)₂₄T₁₂(H₂O)₁₆]·2phen·16H₂O [Ln = Sm (2a), Eu (2b), and Gd (2c)], and [Ho₈(phen)₂Ge₁₂(μ₃-O)₂₄T₁₂(H₂O)₁₄]·2phen·13H₂O (3), have been hydrothermally synthesized from the reactions of bis(carboxyethylgermanium sesquioxide) and Ln₂O₃ with auxiliary phen chromophores. Compounds 1a and 1b consist of cage clusters [Ln₈(phen)₂Ge₁₂(μ₃-O)₂₄T₁₂(H₂O)₁₆] and free H₂O molecules, where cage clusters are arranged in a CsCl type, while compounds 2a-2c consist of cage clusters [Ln₈(phen)₂Ge₁₂(μ₃-O)₂₄T₁₂(H₂O)₁₆], free phen, and free H₂O molecules, where cage clusters are arranged in a NaCl type. Compound 3 consists of the one-dimensional neutral chain [Ho₈(phen)₂Ge₁₂(μ₃-O)₂₄T₁₂(H₂O)₁₄]_n and free H₂O 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.