Cross-Conjugated Polymers with Large Two-Photon Absorption Cross-Sections for Metal Ion Sensing

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• 作者：Fei Huang ; Yanqing Tian ; Ching-Yi Chen ; Yen-Ju Cheng ; A. Cody Young ; Alex K.-Y. Jen
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：July 19, 2007
• 年：2007
• 卷：111
• 期：28
• 页码：10673 - 10681
• 全文大小：549K
• 年卷期：v.111,no.28(July 19, 2007)
• ISSN：1932-7455

文摘

The synthesis and metal ion sensing properties of two new cross-conjugated polymers, poly[(9,9-di-n-hexylfluorene-2,7-diyl)-alt-co-(2-(4-(N,N-(dibutylamino)styryl)benzene)-1,4-diyl)] (P1) and poly[(9,9-di-n-hexylfluorene-2,7-diyl)-alt-co-(2,5-bis(4- (N,N-(dibutylamino)styryl)benzene)-1,4-diyl)] (P2) are reported. Thesetwo polymers show very different sensing characteristics from those observed for linear conjugated polymers.Upon binding with different metal ions, P1 and P2 show clear intensity changes and large shift of theirfluorescence emission peaks. This combined response significantly improves their binding selectivity. Moreover,the donor--bridge-donor (D--D) conjugated side chain motifs on P2 endow it with efficient two-photonabsorbing (2PA) property. This allows it to be used in two-photon laser scanning microscopy and sensing.