Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates

详细信息    查看全文

• 作者：Fran莽ois Le Natur ; Guillaume Calvez ; Jean-Paul Gu茅gan ; Laurent Le Poll猫s ; Xavier Trivelli ; Kevin Bernot ; Carole Daiguebonne ; Chrystelle Neaime ; Karine Costuas ; Fabien Grasset ; Olivier Guillou
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：June 15, 2015
• 年：2015
• 卷：54
• 期：12
• 页码：6043-6054
• 全文大小：699K
• ISSN：1520-510X

文摘

For the first time, hexanuclear complexes with general chemical formula [Ln₆O(OH)₈(NO₃)₆(H₂O)_n]²⁺ with n = 12 for Ln = Sm鈥揕u and Y and n = 14 for Ln = Pr and Nd were stabilized as nanoaggregates in ethylene glycol (EG). These unprecedented nanoaggregates were structurally characterized by ⁸⁹Y and ¹H NMR spectroscopy, UV鈥搗is absorption and luminescence spectroscopies, electrospray ionization mass spectrometry, diffusion ordered spectroscopy, transmission electron microscopy, and dynamic light scattering. These nanoaggregates present a 200 nm mean solvodynamic diameter. In these nanoaggregates, hexanuclear complexes are isolated and solvated by EG molecules. The replacement of ethylene glycol by 2-hydroxybenzyl alcohol provides new nanoaggregates that present an antenna effect toward lanthanide ions. This results in a significant enhancement of the luminescence properties of the aggregates and demonstrates the suitability of the strategy for obtaining highly tunable luminescent solutions.