27803-79-8Relevant articles and documents
An illuminating framework: Understanding the photoluminescence of α- CuAlCl4
Sullivan, Roger M.,Martin, James D.
, p. 10092 - 10097 (1999)
CuAlCl4 exemplifies a new class of phosphors based on metal halide analogues of aluminophosphates. The α- and β-CuAlCl4 phases show brilliant blue to blue-green luminescence. The electronic structure of the CuAlCl4 corner sharing tetrahedral frameworks has been explored by fluorimetric and diffuse reflectance measurements on the isomorphous series α-CuAlBr(x)Cl(4- x) (x = 0-4). The photoluminescence is demonstrated to be a bulk property of the electronically isolated CuCl(4/2) tetrahedra within the framework matrix. Remarkably, the structural framework is flexible such that at least 1 mol of small molecule gases per CuAlCl4 formula unit can be reversibly sorbed. The sorption/desorption of small molecule gases further results in the reversible quenching of the photoluminescence.
Effects of catalyst composition on the ionic liquid catalyzed isobutane/2-butene alkylation
Liu, Ying,Li, Rui,Sun, Hongjuan,Hu, Ruisheng
, p. 133 - 139 (2015)
Ionic liquid catalyzed isobutane/2-butene alkylation modified with metal compounds was studied. The effect of catalyst composition on the alkylation selectivity was investigated. 27Al NMR, ESI-MS, and FTIR spectra reveal that the catalytic selectivity of the modified ionic liquid is probably determined by the catalyst composition rather than by the acid strength. The complexation of transition metal with 2-butene can increase the internal isobutane-to-olefin ratio of feed during the alkylation reaction, which results in the better selectivity of the modified ionic liquid. The best ionic liquid catalysts were those containing CuAlCl4 complexes, giving the alkylate with 87.5 wt% trimethylpentanes and a calculated research octane number (RON) of 100.5.