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教授

博士生导师

硕士生导师

主要任职:大连理工大学莱斯特国际学院副院长

性别:男

毕业院校:波鸿大学

学位:博士

所在单位:化工学院

学科:应用化学. 精细化工

办公地点:大连理工大学西部校区精细化工国家重点实验室E段521

联系方式:+86-411-84986487

电子邮箱:jinxuan.liu@dlut.edu.cn

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Enhanced S-2 Fluorescence from a Free-Base Tetraphenylporphyrin Surface-Mounted Metal Organic Framework

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论文类型:期刊论文

发表时间:2018-10-18

发表刊物:JOURNAL OF PHYSICAL CHEMISTRY C

收录刊物:EI、SCIE

卷号:122

期号:41

页面范围:23321-23328

ISSN号:1932-7447

摘要:The ultrafast transient dynamics of a free-base tetraphenylporphyrin (H2TPP) surface-mounted metal organic framework (SURMOF) is spectroscopically characterized and compared with that of H2TPP in ethanol solution. A dramatic increase of the quantum yield of the Soret band fluorescence (S-2 -> S-0) is observed in the H2TPP-SURMOF, which is accompanied by an increase of the S-2 fluorescence lifetime and a broadening of the fluorescence spectra. In contrast, the Q band (S-1) fluorescence is strongly quenched in the H2TPP SURMOF compared with the fluorescence of H(2)TPPin ethanol solution. The observed transient absorption kinetics supports the fluorescence data. The enhanced fluorescence in the SURMOF compared with H2TPP in solution is attributed to the combination of two factors: the alignment of the vibrational energy levels of the dominant Franck-Condon active mode of the Soret and Q bands and the weaker coupling of these modes to the environment.