期刊
INORGANIC CHEMISTRY
卷 62, 期 7, 页码 3170-3177出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.2c04086
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In this study, the observation of anti-Kasha's rule emission in a multicomponent three-dimensional nanotubular metal-organic framework (MOF-NT) was reported. The MOF-NT displayed strong excitation-dependent fluorescence from the ultraviolet to the visible spectral region and showed a discriminative photoluminescence response to isomeric nitroaromatic compounds. This work demonstrated the intrinsic anti-Kasha's rule emission in crystalline-state MOF materials and provided new perspectives for the development of advanced solid-state emissive materials.
The peak photoluminescence (PL) of conventional fluorophores is independent of the excitation wavelength (called Kasha's rule), while the search of metal-organic framework materials with the so-called anti-Kasha's rule emission remains very limited. Herein, we report the observation of anti-Kasha's rule emission in a multicomponent PL three-dimensional nanotubular metal-organic framework (abbr. MOF-NT), [Zn(mu-L)(mu-bix)]n center dot 0.33nH2O [H2L = biphenyl-3,5-dicarboxylic acid; bix = 1,4-bis(imidazole-1-ylmethyl)benzene]. The MOF-NT crystalline sample represents a notable example of strong excitation-dependent fluorescence from the ultraviolet to the visible spectral region. Moreover, by virtue of electronic flexibility and high PL efficiency, MOF-NT shows a discriminative PL response between isomeric nitroaromatic compounds. The work demonstrated the intrinsic anti-Kasha's rule emission in the crystalline-state MOF materials, providing new visions for the development of advanced solid-state emissive materials.
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