Near-Infrared Luminescence from Visible-Light-Sensitized Hybrid Materials Covalently Linked with Tris(8-hydroxyquinolinate)-lanthanide [Er(III), Nd(III), and Yb(III)] Derivatives

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• 作者：Lining Sun ; Song Dang ; Jiangbo Yu ; Jing Feng ; Liyi Shi ; Hongjie Zhang
• 刊名：Journal of Physical Chemistry B
• 出版年：2010
• 出版时间：December 16, 2010
• 年：2010
• 卷：114
• 期：49
• 页码：16393-16397
• 全文大小：182K
• 年卷期：v.114,no.49(December 16, 2010)
• ISSN：1520-5207

文摘

A series of new near-infrared (NIR) luminescent lanthanide−quinolinate derivatives [Ln(Q−Si)₃] and xerogels (named as LnQSi−Gel, Ln = Er, Nd, Yb) covalently linked with the Ln(Q−Si)₃ by using the 8-hydroxyquinoline-functionalized alkoxysilane (Q−Si) have been synthesized. The obtained xerogel materials LnQSi−Gel are rigid and show homogeneous by field-emission scanning electron microscopy (FE-SEM) images. The Fourier-transform infrared (FT-IR), fluorescence spectra of Ln(Q−Si)₃, and LnQSi−Gel were measured, and the corresponding luminescence decay analyses were recorded. Of importance here is that the excitation spectra of the Ln(Q−Si)₃ and LnQSi−Gel extend to the region of visible light (more than 500 nm). Upon ligand-mediated excitation with the visible light, the Ln(Q−Si)₃ and LnQSi−Gel show the characteristic NIR-luminescence of the corresponding lanthanide ions through the intramolecular energy transfer from the ligands to the lanthanide ions. The good luminescent performances enable these NIR-luminescent xerogel materials to have possible applications in medical diagnostics, laser systems, and optics, etc.