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.
![Graphical abstract: Two new oxyiodoplumbates: the unique 3-D hybrid oxyiodoplumbate based on neutral 2-D [Pb2I4]n layers](http://hg.y866.cn/compound/lib/scimg/usr/1/C8DT01927D.jpg)