Monoalkylation of primary amines using amine hydrobromides and alkyl bromides has been carried out. Under controlled reaction conditions the reactant primary amine was selectively deprotonated and made available for reaction, while the newly generated secondary amine remained protonated, and did not participate in alkylation further. Reaction was carried out under mild reaction conditions and was applicable to a wide range of primary amines and alkyl bromides.
Hole Doping of Tin Bromide and Lead Bromide Organic–Inorganic Hybrid Semiconductors
作者:Giancarlo S. Lorena、Hiroyuki Hasegawa、Yukihiro Takahashi、Jun Harada、Tamotsu Inabe
DOI:10.1246/cl.140536
日期:2014.10.5
Isomorphous layered A2MBr4 perovskite (A = C6H5C2H4NH3+ and C6H9C2H4NH3+; M = Sn and Pb) semiconductors with energy gaps of 2.5–2.9 eV were prepared. Though the as-grown A2MBr4 perovskites displayed lower conductivities than the iodide analogs, they were found to be spontaneously doped. Furthermore, we demonstrated that hole doping is effective in wide-ranging A2MX4 materials that have sizable valence and conduction bands with tunable band gaps, showing potential as soluble semiconductors.
Controllable transformation between 3D and 2D perovskites through cation exchange
作者:Weixin Huang、Yuanxing Wang、Subila K. Balakrishnan
DOI:10.1039/c8cc04261f
日期:——
The transformation between 3D and 2D perovskites can be controlled through the post-synthesis introduction of foreign cations.
三维和二维钙钛矿之间的转化可以通过后合成引入外部阳离子来控制。
PEA<sub>2</sub>SnBr<sub>4</sub>: a water-stable lead-free two-dimensional perovskite and demonstration of its use as a co-catalyst in hydrogen photogeneration and organic-dye degradation
to the two separate components with hydrogen evolution rates up to 1600 μmol g−1 h−1 and analogous improvements in the efficiency of methylenebluedegradation. The present results, providing a novel water-resistant perovskite and co-catalytic system, pave the way towards the safe, efficient and real use of metal halide perovskites in catalysis.
新型无铅2D钙钛矿,即PEA 2 SnBr 4,在与水接触时保留了其原始的晶体结构和光学性能,显示出令人印象深刻的耐水性。通过将PEA 2 SnBr 4与石墨氮化碳偶合,这些关键性能已被有利地用于新型催化体系的制备。已经制备了在不同金属卤化物钙钛矿负载量(5和15 wt%)下的PEA 2 SnBr 4 / gC 3 N 4复合材料,并在水性环境中氢光生和有机染料降解(亚甲基蓝)中进行了测试。结果显示H 2的显着增强相对于两个单独的组分生产复合物,氢释放速率高达1600μmolg -1 h -1,并且亚甲基蓝降解效率得到类似的提高。本发明的结果提供了一种新颖的防水钙钛矿和助催化体系,为安全,有效和实际使用金属卤化物钙钛矿催化中铺平了道路。
Two-Dimensional Halide Perovskite Materials
申请人:Purdue Research Foundation
公开号:US20210343948A1
公开(公告)日:2021-11-04
The present disclosure relates to novel two-dimensional halide perovskite materials, and the method of making and using the two-dimensional halide perovskite materials.