Lin Haoran, Zhou Chenkun, Tian Yu, Besara Tiglet, Neu Jennifer, Siegrist Theo, Zhou Yan, Bullock James, Schanze Kirk S, Ming Wenmei, Du Mao-Hua, Ma Biwu
Department of Chemical and Biomedical Engineering , FAMU-FSU College of Engineering , Tallahassee , Florida 32310 , USA . Email:
Materials Science and Engineering Program , Florida State University , Tallahassee , Florida 32306 , USA.
Chem Sci. 2017 Dec 1;8(12):8400-8404. doi: 10.1039/c7sc03675b. Epub 2017 Oct 16.
The organic metal halide hybrids welcome a new member with a one-dimensional (1D) tubular structure. Herein we report the synthesis and characterization of a single crystalline bulk assembly of organic metal halide nanotubes, (CHN)PbBr. In a metal halide nanotube, six face-sharing metal halide dimers (PbBr) connect at the corners to form rings that extend in one dimension, of which the inside and outside surfaces are coated with protonated hexamethylenetetramine (HMTA) cations (CHN). This unique 1D tubular structure possesses highly localized electronic states with strong quantum confinement, resulting in the formation of self-trapped excitons that give strongly Stokes shifted broadband yellowish-white emission with a photoluminescence quantum efficiency (PLQE) of ∼7%. Having realized single crystalline bulk assemblies of two-dimensional (2D) wells, 1D wires, and now 1D tubes using organic metal halide hybrids, our work significantly advances the research on bulk assemblies of quantum-confined materials.
有机金属卤化物杂化物迎来了一位具有一维（1D）管状结构的新成员。在此，我们报道了有机金属卤化物纳米管（CHN）PbBr单晶块体组装体的合成与表征。在金属卤化物纳米管中，六个共面的金属卤化物二聚体（PbBr）在角上相连形成在一维方向上延伸的环，其内外表面涂覆有质子化的六亚甲基四胺（HMTA）阳离子（CHN）。这种独特的一维管状结构具有高度局域化的电子态和强烈的量子限制，导致形成自陷激子，产生具有约7%的光致发光量子效率（PLQE）的强斯托克斯位移宽带黄白色发射。利用有机金属卤化物杂化物实现了二维（2D）阱、一维线以及现在的一维管的单晶块体组装，我们的工作显著推动了量子限制材料块体组装的研究。
