Table 1 Summary of in-plane lattice parameters, types and directions of intermolecular interaction chains, and crystal growth directions for various 2D perovskites

From: Two-dimensional organic-inorganic hybrid perovskite quantum-well nanowires enabled by directional noncovalent intermolecular interactions

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