| Autor: |
Hu, Yue-Qiao, Hui, Hong-Yan, Wen, Hong-Qiang, Wang, Yanyan, Lin, Wei-Quan, Yang, De-Suo, Feng, Guo-Dong |
| Předmět: |
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| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 9/7/2019, Vol. 21 Issue 17, p12888-12894, 7p |
| Abstrakt: |
The structural information of a material in both the solid state and solution state is essential to the in-depth understanding of the properties of inorganic–organic hybrid materials. A one-dimensional (1D) lead bromide formulated as [H][NH3(CH2)2SS(CH2)2NH3][H2O][PbBr5] (1) could be converted into a new two-dimensional (2D) complex, [NH3(CH2)2SS(CH2)2NH3][PbBr4] (2), by soaking the crystals in water. The isolated 2D compound showed single-layer lead-halide perovskite structures. Electrospray ionization mass spectrometry (ESI-MS) analyses of the reaction solution revealed that the [PbBr3]− fragments are initially formed from the rapid decomposition of the 1D [PbBr5]3− chains and subsequently reassemble into 2D [PbBr4]2− layers, which was verified by powder X-ray diffraction (PXRD) and microcalorimetry. Because of the decomposition and reassembly process, complex 1 could be used as a precursor to synthesize M2+-doped 2D lead bromide perovskites, namely, Mn@2, Ni@2 and Cd@2. In addition, preliminary tests indicated that complex 2 exhibited a lower optical band gap (3.25 eV) and higher electrical conductivity (3.2 × 10−11 S cm−1) than complex 1 (3.38 eV, 5.4 × 10−12 S cm−1). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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