Series of Dicyanamide-Interlaced Assembly of Zinc-Schiff-Base Complexes: Crystal Structure and Photophysical and Thermal Studies

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• 作者：Monami Maiti ; Dipali Sadhukhan ; Santarupa Thakurta ; Syamantak Roy ; Guillaume Pilet ; Ray J. Butcher ; Aline Nonat ; Lo茂c J. Charbonni猫re ; Samiran Mitra
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：November 19, 2012
• 年：2012
• 卷：51
• 期：22
• 页码：12176-12187
• 全文大小：596K
• 年卷期：v.51,no.22(November 19, 2012)
• ISSN：1520-510X

文摘

Four new dicyanamide (dca) bridged multinuclear Zn^II-Schiff-base complexes, {[Zn₂L¹(渭_1,5-dca)dca]路CH₃OH}₂ (1), [Zn₂L²(渭_1,5-dca)dca]_n (2), [Zn₃L³₂(渭_1,5-dca)₂]_n (3), and [(ZnL⁴)₂Zn(渭_1,5-dca)dca]_n (4), have been synthesized using four different Schiff bases L¹H₂ = N,N^/-bis(3-methoxysalicylidenimino)-1,3-diaminopentane, L²H₂ = N,N鈥?bis(5-bromo-3-methoxysalicylidenimino)-1,3-diaminopropane, L³H₂ = N,N鈥?bis(5-bromosalicylidenimino)-1,3-diaminopropane, and L⁴H₂ = N,N鈥?bis(5-chlorosalicylidenimino)-1,3-diaminopropane and NaN(CN)₂ in order to extend the metal鈥搇igand assembly. The directional properties of linear end-to-end bridging dca ligands have resulted in different metal ion connectivities leading to unique variety of templates in each of the complexes. All the ligands and complexes have been characterized by microanalytical and spectroscopic techniques. The structures of the complexes have been conclusively determined by single crystal X-ray diffraction studies. Thermogravimetric analyses have been performed to investigate the thermal stability of the metal鈥搊rganic frameworks. Finally, the photoluminescence properties of the complexes as well as their respective ligands have been investigated with a comparative approach.