Table 1 Summary of in-plane lattice parameters, types and directions of intermolecular interaction chains, and crystal growth directions for various 2D perovskites
Perovskite | Longer-axis D1 (Å) | Shorter-axis D2 (Å) | Anisotropic ratio D1/D2 | Intermolecular interaction chain | 1D growth direction |
---|---|---|---|---|---|
(PMA)2PbI4 | 9.156 | 8.689 | 1.054 | C–H···π along D2 | along D2 |
(2FPMA)2PbI4 | 9.155 | 8.699 | 1.052 | C–H···π along D2 | along D2 |
(4FPMA)2PbI4 | 9.244 | 8.696 | 1.063 | C–H···π along D2 | along D2 |
(MBA)2PbI4 | 9.311 | 8.894 | 1.047 | C–H···π along D2 | along D2 |
(DFP)2PbI4 | 9.289 | 8.982 | 1.034 | Hydrogen bond along D2 | along D2 |
(DFPD)2PbI4 | 9.346 | 9.011 | 1.037 | Hydrogen bond along D2 | along D2 |
(PA)2PbI4 | 8.930 | 8.672 | 1.030 | CH3···CH3 along D2 | along D2 |
(ABA)2PbI4 | 9.280 | 8.906 | 1.042 | Hydrogen bond along D1 | along D1 |
(2CF3PEA)2PbI4 | 8.665 | 8.534 | 1.015 | π···π along D1 | along D1 |
(PMA)2SnI4 | 9.094 | 8.667 | 1.049 | C–H···π along D2 | along D2 |
(2FPMA)2SnI4 | 9.104 | 8.667 | 1.050 | C–H···π along D2 | along D2 |
(PA)2SnI4 | 8.975 | 8.579 | 1.046 | CH3···CH3 along D2 | along D2 |
(DFP)2SnI4 | 9.311 | 8.950 | 1.040 | Hydrogen bonds along D2 | along D2 |
(DFPD)2SnI4 | 9.501 | 8.872 | 1.071 | Hydrogen bonds along D2 | along D2 |
(MBA)2SnI4 | 9.357 | 8.910 | 1.050 | C–H···π along D2 | along D2 |
(2CF3PEA)2CuCl4 | 8.253 | 7.666 | 1.077 | π···π along D2 | along D2 |
(CH2O2PEA)2CdCl4 | 7.432 | 7.496 | 0.991 | π···π along D2 | along D2 |
(TAP3)2PbBr4 | 9.540 | 7.896 | 1.208 | π···π along D2 and hydrogen bond along D1 | along D2 |
(BrCA3)2PbBr4 | 8.949 | 7.760 | 1.153 | π···π along D2 | along D2 |
(BA)2PbI4 | 8.876 | 8.693 | 1.021 | Weak CH3···CH3 along D2 | Near 2D growth |
(HA)2PbI4 | 8.941 | 8.687 | 1.029 | Weak CH3···CH3 along D2 | Near 2D growth |
(PEA)2PbI4 | 8.744 | 8.744 | 1.000 | no directional non-covalent interaction | 2D growth |
(4CF3PMA)2PbI4 | 8.691 | 8.418 | 1.032 | no directional non-covalent interaction | 2D growth |
(PMA)2PbBr4 | 8.147 | 8.123 | 1.003 | no directional non-covalent interaction | 2D growth |