期刊
CRYSTENGCOMM
卷 14, 期 3, 页码 1010-1015出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ce06069d
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资金
- National Natural Science Foundation of China [20801006, 90922023]
- Natural Science Foundation of Beijing [2093037]
Two supramolecular cocrystals, 1, pyrene/1,4-diiodotetrafluorobenzene (1,4-DITFB), and 2, pyrene/1,2-diiodotetrafluorobenzene (1,2-DITFB), have been prepared and characterized using X-ray diffraction analysis and multiple spectroscopic methods. Several intermolecular interactions such as C-I center dot center dot center dot I-C, C-I center dot center dot center dot pi, pi-pi and C-H center dot center dot center dot F were observed in cocrystal 1 and/or 2, in which DITFB molecules act simultaneously as an isolator to prevent the pyrene molecule from aggregating and also as a heavy atom effect agent to induce phosphorescence emission from pyrene. The spectral results demonstrate that the two cocrystals both display strong phosphorescence at room temperature with decay rates of 1.7 x 10(3) s(-1) and 0.22 x 10(3) s(-1), respectively. The differences in the phosphorescence behavior between 1 and 2 are relevant to the local molecular environment created by 1,4- or 1,2-DITFB in cocrystals.
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