Schmitt, Tanja; Bourelle, Sean; Tye, Nathaniel; Soavi, Giancarlo; Bond, Andrew D.; Feldmann, Sascha; Traore, Boubacar; Katan, Claudine; Even, Jacky; Dutton, Sian E.; Deschler, Felix published the artcile< Control of Crystal Symmetry Breaking with Halogen-Substituted Benzylammonium in Layered Hybrid Metal-Halide Perovskites>, Name: 4-Bromobenzylamine, the main research area is crystal symmetry breaking halobenzylammonium lead iodide layered hybrid perovskite.
Layered hybrid metal-halide perovskites with noncentrosym. crystal structure are predicted to show spin-selective band splitting from Rashba effects. Thus, fabrication of metal-halide perovskites with defined crystal symmetry is desired to control the spin-splitting in their electronic states. Here, the authors report the influence of halogen para-substituents on the crystal structure of benzylammonium lead iodide perovskites (4-XC6H4CH2NH3)2PbI4 (X = H, F, Cl, Br). Using x-ray diffraction and 2nd-harmonic generation, the authors study structure and symmetry of single-crystal and thin-film samples. The authors report that introduction of a halogen atom lowers the crystal symmetry such that the Cl- and Br-substituted structures are noncentrosym. The differences can be attributed to the nature of the intermol. interactions between the organic mols. The authors calculate electronic band structures and find good control of Rashba splittings. The results present a facile approach to tailor hybrid layered metal halide perovskites with potential for spintronic and nonlinear optical applications.
Journal of the American Chemical Society published new progress about Band structure. 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Name: 4-Bromobenzylamine.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary