Two new oxyiodoplumbates: the unique 3-D hybrid oxyiodoplumbate based on neutral 2-D [Pb2I4]n layers

Abstract

Two new oxyiodoplumbates, [Pb₃O(μ₃-OH)₂I₂]_n (1) and [Pb₄I₄(μ₄-L)₂]_n (2, H₂L = ethylene glycol), have been solvothermally synthesized and structurally characterized. 1 consists of a 1-D tenioid [Pb₃O(μ₃-OH)₂I₂]_n chain built up from 1-D tenioid [Pb₂O(μ₃-OH)₂]_n chains decorated [PbI₂] groups, which provides a new type of oxyiodoplumbate, [Pb₃O(μ₃-OH)₂I₂]_n, with oxhydryl groups. 2 consists of the rare neutral tetra-nuclear [Pb₄L₄] complexes and neutral 2-D [Pb₂I₄]_n layers, which are interconnected to generate the only example of a 3-D hybrid oxyiodoplumbate based on neutral 2-D [Pb₂I₄]_n layers, mainly because the reported iodoplumbate cores usually possess negative charge. The optical properties and density functional theory calculations of 1 and 2 were studied.