Multi-Emissive Difluoroboron Dibenzoylmethane Polylactide Exhibiting Intense Fluorescence and Oxygen-Sensitive Room-Temperature Phosphorescence

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• 作者：Guoqing Zhang ; Jianbin Chen ; Sarah J. Payne ; Steven E. Kooi ; J. N. Demas ; Cassandra L. Fraser
• 刊名：Journal of the American Chemical Society
• 出版年：2007
• 出版时间：July 25, 2007
• 年：2007
• 卷：129
• 期：29
• 页码：8942 - 8943
• 全文大小：278K
• 年卷期：v.129,no.29(July 25, 2007)
• ISSN：1520-5126

文摘

Boron difluoride compounds are light emitting materials with impressive optical properties. Though their strong one- and two-photon absorption and intense fluorescence are well-known and exploited in molecular probes, lasers, and photosensitizers, phosphorescence, in contrast, is typically observed only at low temperatures. Here, we report that unusual room-temperature phosphorescence is achieved by combining a classic boron dye, difluoroboron dibenzoylmethane, BF₂dbm, with poly(lactic acid) (PLA), a common biopolymer, resulting in a highly sensitive single-component oxygen sensor. Fluorescence quantum yields are enhanced, and temperature-sensitive delayed fluorescence is also observed. Multi-emissive BF₂dbmPLA biomaterials show great promise as multifunctional molecular probes and sensors.