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Abstract:
A new heterometallic iodide, PbI4Cu2(PPh3)4, was synthesized by reactions of PbI2, CuI and triphenylphosphine (PPh3) in DMF solution. The single-crystal X-ray diffraction analyses show that Pb(II) center adopts an unusual cis-divacant octahedral geometry. Crystal data: triclinic, space group P over(1, -), a = 12.3455 (2) Å, b = 13.8673 (1) Å, c = 21.3421 (1) Å, α = 106.623 (4) °, β = 103.478 (6) °, γ = 93.574 (5) °, V = 3371.83 (6) Å3 and Z = 2. Density function theory (DFT) calculations and fragment orbital interaction analyses reveal the presence of a three-center four-electron (3c-4e) hypervalent bonding about lead; and the formation of the unusual cis-divacant [PbI4]2- octahedron is energetically favorable. The title yellow compound has an optical bandgap of 2.69 eV and shows remarkable red-infrared fluorescence emission at 732 nm with lifetime of 24 μs which is assigned as an iodine 5p-lead 6s to PPh3-lead 6p charge transfer (XM-LM-CT). © 2006 Elsevier Inc. All rights reserved.
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Journal of Solid State Chemistry
ISSN: 0022-4596
Year: 2006
Issue: 8
Volume: 179
Page: 2361-2366
2 . 1 0 7
JCR@2006
3 . 2 0 0
JCR@2023
JCR Journal Grade:2
Cited Count:
SCOPUS Cited Count: 31
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
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30 Days PV: 0
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