Crystal Structure, Fluorescence, and Nanostructuration Studies of the First ZnII Anthracene-Based Curcuminoid

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• 作者：N煤ria Aliaga-Alcalde ; Laura Rodrı ; ́ ; guez ; Marilena Ferbinteanu ; Petra H枚fer ; Thomas Weyherm眉ller
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：January 16, 2012
• 年：2012
• 卷：51
• 期：2
• 页码：864-873
• 全文大小：518K
• 年卷期：v.51,no.2(January 16, 2012)
• ISSN：1520-510X

文摘

In the following article the coordination properties of a recently reported curcuminoid 9Accm (9Accm = 1,7-(di-9-anthracene)-1,6-heptadiene-3,5-dione) with Zn^II are reported. Preparation, crystal structure, and fluorescence spectroscopic studies of [Zn^II(9Accm)₂(py)] (1) are presented, as well as preliminary AFM and confocal microscopy studies on graphite surfaces. Complex 1 is the first crystallographically characterized Zn鈥揷urcuminoid in the literature; the intrinsic features of the complex are contrasted with the free ligand, 9Accm, and [Cu^II(9Accm)₂(py)] (2), a similar copper system, which has been recently described by us. It is shown that complex 1 exhibits a chelation enhancement of fluorescence (CHEF) and 2 a chelation enhancement of quenching (CHEQ) with respect to the fluorescence response of the free ligand, demonstrating the highly sensitive response of 9Accm versus these two metals. All studies are supported by density functional theory (DFT) calculations.