Key points are not available for this paper at this time.
The preparation, crystal structures, optical absorption spectra, and photoluminescence spectra of the title compounds are reported. The compounds were prepared in single crystal form. C 6 H 5 CH 2 NH 3 2 PbI 4 consists of anionic perovskite sheets of corner-sharing Pbl 6 octahedra, which alternate with the C 6 H 5 CH 2 NH 3 + sheets. C 6 H 5 CH 2 CH 2 SC(NH 2 ) 2 3 PbI 5 consists of zig-zag chains of anionic corner sharing PbI 6 octahedra separated by C 6 H 5 CH 2 CH 2 SC(NH 2 ) 2 cations. C 10 H 7 CH 2 NH 3 Pbl 3 consists of twin chains of edge-sharing PbI 6 octahedra separated by C 10 H 7 CH 2 NH 3 cations. The compounds are thus low-dimensional systems. The excitonic spectra were observed in all cases, even at room temperature, and the possibility of organicinorganic excitonic interactions is discussed.
Papavassiliou et al. (Mon,) studied this question.