Unprecedented Second-Timescale Blue/Green Emissions and Iodine-Uptake-Induced Single-Crystal-to-Single-Crystal Transformation in ZnII/CdII Metal-Organic Frameworks.

Autor:	Yuan, Shuai, Deng, Yong ‐ Kai, Sun, Di
Předmět:	EMISSIONS (Air pollution) IODINE SINGLE crystals METAL-organic frameworks PHOSPHORS
Zdroj:	Chemistry - A European Journal; Aug2014, Vol. 20 Issue 32, p10093-10098, 6p
Abstrakt:	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. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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