See all entries for this property (3 total)
Crystal system: orthorhombic
| a: | 27.788 (±0.005) Å |
| b: | 8.6541 (±0.0014) Å |
| c: | 8.2367 (±0.0013) Å |
| α: | 90° |
| β: | 90° |
| γ: | 90° |
Starting materials: PbBr2, HBr, C6H11NH2
Product: Orange crystals
Description: PbBr2 was dissolved in an HBr solution. Then, the cyclic amine was added and immediately resulted in the precipitation of a solid, which was re-dissolved by refluxing for 1-12 hours. The solution was then cooled slowly to room temperature, causing crystals to precipitate.
Method: Single-crystal X-ray diffraction
Description: A Bruker SMART 1K CCD area detector diffractometer using Mo Kalpha radiation was used to collect the SCXRD data. Omega-scans of width 0.3 degrees were used. The SAINT+ program, version 6.02, was used to perform data reduction and the XPREP program was used to perform face indexed absorption corrections. The SHELXS-97 program was used for solving the structure, and the SHELXL-97 program was used to refine it by full matrix least-squares minimization.
Starting materials: Cyclohexylammonium bromide, PbBr2, HBr
Product: large, pale-yellow crystals
Description: Cyclohexylammonium bromide (20 mmol, 3.60 g), and PbBr2 (10 mmol, 3.67 g) were dissolved in HBr aqueous solution (40%, 100 mL). A clear solution resulted after refluxing the mixture at 353 K for 3 hrs. Crystals of (CHA)2PbBr4 were obtained by cooling the solution at a rate of 0.125 K/h.
Method: Physical Properties Measurement
Description: Measured with precision impedance analyzer (Model: Agilent 4294A, Santa Clara, CA). Measured at 1 MHz.
Crystal system: orthorhombic
| Band gap (optical, diffuse reflectance), eV |
|---|
Starting materials: Cyclohexylammonium bromide, PbBr2, HBr
Product: large, pale-yellow crystals
Description: Cyclohexylammonium bromide (20 mmol, 3.60 g), and PbBr2 (10 mmol, 3.67 g) were dissolved in HBr aqueous solution (40%, 100 mL). A clear solution resulted after refluxing the mixture at 353 K for 3 hrs. Crystals of (CHA)2PbBr4 were obtained by cooling the solution at a rate of 0.125 K/h.
Method: UV-vis absorption (diffuse reflectance)
Starting materials: Cyclohexylammonium bromide, PbBr2, HBr
Product: large, pale-yellow crystals
Description: Cyclohexylammonium bromide (20 mmol, 3.60 g), and PbBr2 (10 mmol, 3.67 g) were dissolved in HBr aqueous solution (40%, 100 mL). A clear solution resulted after refluxing the mixture at 353 K for 3 hrs. Crystals of (CHA)2PbBr4 were obtained by cooling the solution at a rate of 0.125 K/h.
Method: UV-vis absorption (diffuse reflectance)