Multicomponent Anti-Kasha's Rule Emission from Nanotubular Metal-Organic Frameworks for Selective Detection of Small Molecules

Yangbin Xie; Luying Liu; Zetao Huang; Huixian Miao; Wenjiang Zhaxi; Fengnan Duan; Wei Huang; Dayu Wu

doi:10.1021/acs.inorgchem.2c04086

Multicomponent Anti-Kasha's Rule Emission from Nanotubular Metal-Organic Frameworks for Selective Detection of Small Molecules

Inorg Chem. 2023 Feb 20;62(7):3170-3177. doi: 10.1021/acs.inorgchem.2c04086. Epub 2023 Feb 6.

Authors

Yangbin Xie¹, Luying Liu¹, Zetao Huang¹, Huixian Miao¹, Wenjiang Zhaxi¹, Fengnan Duan¹, Wei Huang¹, Dayu Wu¹

Affiliation

¹ Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China.

PMID: 36744794
DOI: 10.1021/acs.inorgchem.2c04086

Abstract

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(μ-L)(μ-bix)]_n·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.