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Abstract:
Two triphenylmethylphosphonium/haloplumbate hybrids, i.e., [(PPh3Me)(2)(Pb2I6)center dot CH3CN](n) (1) and [(PPh3Me)(PbBr3)](n) (2), have been prepared, in which the (PbX3)(n)(n-) nanochains built from face-sharing PbX6 octahedra are surrounded by organic templates to assemble the core-shell quantum well. Besides, C-H center dot center dot center dot pi interactions among Ph3PMe+ cation can also be detected, which give rise to the 2-D organic layer of 1 and 1-D chain for 2. The good water stabilities could be induced by the strong C-H center dot center dot center dot pi interactions, which can deter the hydrolysis reaction. The energy band gaps of this work mainly derive from the charge transfer of organic components, but their luminescence stems from the inorganic (PbX3)(n)(n-) nanochains with co-existence of free excitons and self-trapped excitons. At temperature lower than 117 K, strong quantum confinement will rule out the free excitons, and self-trapped excitons will dominate, resulting in red-shift luminescence. Moreover, effective and repeatable photocurrent responses can be found in these hybrids.
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CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
ISSN: 0254-5861
CN: 35-1112/TQ
Year: 2021
Issue: 6
Volume: 40
Page: 775-784
0 . 8 4 7
JCR@2021
5 . 9 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
ESI HC Threshold:117
JCR Journal Grade:4
CAS Journal Grade:3
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