Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
Inorg Chem. 2013 May 20;52(10):5657-9. doi: 10.1021/ic400782c. Epub 2013 Apr 29.
Lewis acidic organic ionic liquids provide a novel synthetic medium to prepare new semiconducting chalcogenides, [(Bi4Te4Br2)(Al2Cl5.46Br0.54)]Cl2 (1) and Bi2Se2Br (2). Compound 1 features a cationic (Bi4Te4Br2)(Al2Cl5.46Br0.54) three-dimensional framework, while compound 2 consists of cationic layers of Bi2Se2Br. Spectroscopically measured band gaps of 1 and 2 are ∼0.6 and ∼1.2 eV, respectively. Thermoelectric power measurements of single crystals of 1 indicate an n-type semiconductor.
路易斯酸性有机离子液体提供了一种新颖的合成介质，可用于制备新型半导体硫属化物[(Bi4Te4Br2)(Al2Cl5.46Br0.54)]Cl2（1）和Bi2Se2Br（2）。化合物 1 具有阳离子[(Bi4Te4Br2)(Al2Cl5.46Br0.54)]（2+）的三维框架，而化合物 2 则由[Bi2Se2Br]（2+）的阳离子层组成。光谱测量的 1 和 2 的带隙分别约为 0.6 和 1.2 eV。1 的单晶的热电势测量表明其为 n 型半导体。
