Unprecedented Second‐Timescale Blue/Green Emissions and Iodine‐Uptake‐Induced Single‐Crystal‐to‐Single‐Crystal Transformation in ZnII/CdII Metal–Organic Frameworks |
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| Authors: | Shuai Yuan Yong‐Kai Deng Dr. Di Sun |
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| Affiliation: | Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 (P.R. China) |
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| Abstract: | The long‐persistent phosphorescent metal–organic framework (MOF) is a kind of highly desirable but rare material. Here, two new molecular MOF materials, {[Zn(tipa)Cl] ? NO3 ? 2 DMF}n ( 1 ) and {[Cd2(tipa)2Cl4] ? 6 DMF}n ( 2 ) (tipa=tri(4‐imidazolylphenyl)amine), which have 3D twofold interpenetrated ( utp ) and 2D noninterpenetrated ( kgd ) topologies, respectively, are reported. They exhibit unexpected long‐persistent emissions yet reported: At 77 K, they persist in glowing after stopping the UV irradiation on a timescale up to seconds at 77 K, which can be detected by the naked eye (ca. 2 s). Compounds 1 and 2 also undergo single‐crystal‐to‐single‐crystal (SC‐SC) transformations through different routes; a simple anion‐exchange route for 1 and a complicated replacement of μ1‐Cl? ions by DMF molecules accompanying I3? captured in the void for 2 . |
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| Keywords: | cadmium iodine metal– organic frameworks phosphorescence X‐ray diffraction zinc |
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