首页|Regioisomeric dipyrazolyl-anthracene luminophores: mechanochromic luminescence switch and mercury ion detection with 'turn-off response
Regioisomeric dipyrazolyl-anthracene luminophores: mechanochromic luminescence switch and mercury ion detection with 'turn-off response
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NSTL
A series of regioisomeric luminophores L1-L8 with lH-pyrazol-3-yl or lri-pyrazol-4-yl substituents at the different positions of anthracene core have been synthesised and characterised. According to the photophysical properties and related frontier orbital features of these compounds, the 'site-effect' of pyrazolyl substituent on an anthracene unit can be found, demonstrating the dependence of the properties of the compound on the position of substitution of the pyrazolyl moieties connecting to the anthracene core. Moreover, the target luminophores present reversible mechanochromism properties. The most significant mechanochromism luminescence is achieved for luminophores LI and L2 with pyrazolyl substituents at the 9-and 10-positions of the anthracene unit. Upon grinding the pristine powder sample, a colour change from light yellow to yellow-green is observed. In addition, the target luminophores L2, L4, L6 and L8 demonstrate sensing properties of Hg~(2+) ions with high selectivity and exceptional sensitivity. These findings suggest that these anthracene-centred luminophores are promising functional platforms with fluorescence and selective heavy metal sensor arrays.
Regioisomeric luminophoresdipyrazolyl-anthraceneMechanochromic luminescenceMercury ion detection
Zhi-Feng Wang、Jin Tong、Jing Guo
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Beijing Key Laboratory for Green Catalysis and Separation, Laboratory for Self-Assembly Chemistry, Department of Chemistry and Chemical Industry, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
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