Fascinating Role of the Number of f Electrons in Dipolar and Octupolar Contributions to Quadratic Hyperpolarizability of Trinuclear Lanthanides-Biscopper Schiff Base Complexes

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• 作者：Antonino Gulino ; Ignazio L. Fragal脿 ; Fabio Lupo ; Graziella Malandrino ; Alessandro Motta ; Alessia Colombo ; Claudia Dragonetti ; Stefania Righetto ; Dominique Roberto ; Renato Ugo ; Francesco Demartin ; Isabelle Ledoux-Rak ; Anu Singh
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：July 1, 2013
• 年：2013
• 卷：52
• 期：13
• 页码：7550-7556
• 全文大小：322K
• 年卷期：v.52,no.13(July 1, 2013)
• ISSN：1520-510X

文摘

The trinuclear [Ln(NO₃)₃(CuL)₂] complexes (Ln = La, Ce, Sm, Eu and Er, L = N,N鈥?1,3-propylen-bis(salicylideniminato) have been investigated by a combination of HLS and EFISH techniques to evaluate both the dipolar and octupolar contributions to their significant quadratic hyperpolarizability and to confirm that f electrons may tune their second-order NLO response. In the complexes investigated, the major contribution to the total quadratic hyperpolarizability is largely controlled by the octupolar contribution, but the values of both 尾_EFISH and 尾^J=1, that is the dipolar part, are significantly influenced by the number of f electrons, confirming that the unexpected polarizable character of f electrons may be the origin of such fascinating evidence.