Strongly Enhanced Long-Lived Persistent Room Temperature Phosphorescence Based on the Formation of Metal-Organic Hybrids

Molecule‐based solid‐state materials with room temperature phosphorescence (RTP) are playing an increasingly important role in developing optical sensors, security systems, and biological imaging. However, molecular systems involving long‐lived persistent RTP are still rare to date, which has limite...

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Published in:Advanced optical materials 2016-06, Vol.4 (6), p.897-905
Main Authors: Yang, Xiaogang, Yan, Dongpeng
Format: Article
Language:English
Subjects:
afterglow
Afterglows
Decay
Emission
Illumination
Imaging
long-lived phosphorescence
molecule-metal hybrids
Optics
Phosphorescence
Phosphors
sensors
Stacking
stimuli-responsive materials
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creator Yang, Xiaogang
Yan, Dongpeng
description Molecule‐based solid‐state materials with room temperature phosphorescence (RTP) are playing an increasingly important role in developing optical sensors, security systems, and biological imaging. However, molecular systems involving long‐lived persistent RTP are still rare to date, which has limited the efficiently luminescent recognition and identification. Herein, it is illustrated that the RTP properties of molecular phosphors can be highly enhanced based on coordination interaction with common metal (such as Zn2+). These molecule–metal hybrids present tunable afterglow phosphorescence by adjusting metal species and stacking fashions of molecular units, with the longest RTP lifetime of 1.3 s. Such long‐lived persistent emission decay is higher than most of currently reported molecule‐based and molecule–metal solid‐state RTP systems. Moreover, the reversible phosphorescence transformation under different pH and heat conditions can be further switched and recycled. This work therefore offers a cost‐effective and facile way to achieve high‐performance RTP metal‐organic hybrid materials, which could serve as promising candidates for noble‐metal‐free and rare‐earth‐free phosphors in illumination and sensor applications. Through a molecule–metal coordination, a long‐lived room temperature phosphorescence (room temperature phosphorescence lifetime: 1.3 s) can be obtained within metal–organic frameworks. These frameworks present tunable afterglow decay emission as well as a heat‐ and pH‐stimuli phosphorescence response.
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However, molecular systems involving long‐lived persistent RTP are still rare to date, which has limited the efficiently luminescent recognition and identification. Herein, it is illustrated that the RTP properties of molecular phosphors can be highly enhanced based on coordination interaction with common metal (such as Zn2+). These molecule–metal hybrids present tunable afterglow phosphorescence by adjusting metal species and stacking fashions of molecular units, with the longest RTP lifetime of 1.3 s. Such long‐lived persistent emission decay is higher than most of currently reported molecule‐based and molecule–metal solid‐state RTP systems. Moreover, the reversible phosphorescence transformation under different pH and heat conditions can be further switched and recycled. This work therefore offers a cost‐effective and facile way to achieve high‐performance RTP metal‐organic hybrid materials, which could serve as promising candidates for noble‐metal‐free and rare‐earth‐free phosphors in illumination and sensor applications. Through a molecule–metal coordination, a long‐lived room temperature phosphorescence (room temperature phosphorescence lifetime: 1.3 s) can be obtained within metal–organic frameworks. 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However, molecular systems involving long‐lived persistent RTP are still rare to date, which has limited the efficiently luminescent recognition and identification. Herein, it is illustrated that the RTP properties of molecular phosphors can be highly enhanced based on coordination interaction with common metal (such as Zn2+). These molecule–metal hybrids present tunable afterglow phosphorescence by adjusting metal species and stacking fashions of molecular units, with the longest RTP lifetime of 1.3 s. Such long‐lived persistent emission decay is higher than most of currently reported molecule‐based and molecule–metal solid‐state RTP systems. Moreover, the reversible phosphorescence transformation under different pH and heat conditions can be further switched and recycled. 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subjects afterglow
Afterglows
Decay
Emission
Illumination
Imaging
long-lived phosphorescence
molecule-metal hybrids
Optics
Phosphorescence
Phosphors
sensors
Stacking
stimuli-responsive materials
title Strongly Enhanced Long-Lived Persistent Room Temperature Phosphorescence Based on the Formation of Metal-Organic Hybrids
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