Journal
JOURNAL OF LUMINESCENCE
Volume 253, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2022.119439
Keywords
Crystallization-induced emission enhancement; Pyrene chemistry; Nitro -explosives; Sensing properties
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In this study, blue emitting pyrene-based luminogens with alkyl chain-dependent properties were synthesized and characterized. These luminogens exhibited high photoluminescence efficiency and showed high sensitivity and selectivity for a specific compound, making them potentially useful for contaminant or explosive detection.
In view of the widespread applications and urgent need for efficient blue emitting materials, the synthesis of such materials has seen renewed interest. In the present work, three alkyl chain-dependent blue emitting pyrene-based luminogens were synthesized and characterized. The experimental results show that these luminogens exhibited high photoluminescence efficiency both in solution (>86%) and in the solid state (>35%). Interestingly, 1,3,6,8-tetrakis (pentylphenyl)pyrene (TPPy), as a photoelectric functional material, was endowed with higher quantum yield (72%) and competitiveness due to a remarkable crystallization-induced emission enhancement (CIEE) property. More importantly, TPPy exhibits high sensitivity and selectivity for ortho-nitroaniline (o-NA) with low limit of detection (9.99 x 10-8 M), which is mainly due to the distinctive odd-even effects of the terminal alkyl chain. The results demonstrate that this type of luminogen can potentially be utilized for practical applications in the field of contaminant or explosive detection as a sensitive and portable fluorimeter.
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