Investigation of heavy atom effect of halide alkanes in β-cyclodextrin induced room temperature phosphorimetry

详细信息    查看全文

• 作者：Yan-Sheng Wei ; Wei-Jun Jin ; Ruo-Hua Zhu ; Guo-Wen Xing ; Chang-Song Liua ; Shu-Se Zhang ; Bai-Ling Zhou
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：1996
• 出版时间：June 1996
• 年：1996
• 卷：52
• 期：6
• 页码：683-690
• 全文大小：563 K

文摘

Twenty-one alkyl halides were examined in detail for their heavy atom effect in β-cyclodextrin induced room temperature phosphorescence (β-CD-RTP) with five polycyclic aromatic as mode compounds. The following conclusions were drawn from the experimental results. (1) The heavy atom enhancement effect (HAEE) of halogens in halide alkane are increased in the trend of Br > Cl I. (2) Among the bromoalkanes examined, dibromoalkanes have the strongest HAEE, next the monobromoalkanes. For tri- and tetrabromoalkanes, very weak HAEE was observed. (3) A new heavy atom pertuber, t-butyl chloride, was found to have excellent ability of inducing RTP of polycyclic aromatic compounds. (4) The phosphorescence decay characteristics of the phosphorescent molecules, τ_p, had been measured in the presence of halide alkanes and used to explain the luminescence mechanism of CD-RTP.