Coordination-Induced Spin-State Switching with Nickel Chlorin and Nickel Isobacteriochlorin

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• 作者：Marcel Dommaschk ; Vanessa Thoms ; Christian Sch眉tt ; Christian N盲ther ; Rakesh Puttreddy ; Kari Rissanen ; Rainer Herges
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：October 5, 2015
• 年：2015
• 卷：54
• 期：19
• 页码：9390-9392
• 全文大小：241K
• ISSN：1520-510X

文摘

We present the first coordination-induced spin-state switching with nickel chlorin and nickel isobacteriochlorin. The spin-state switching was monitored by UV鈥搗is spectroscopy and NMR titration experiments. The association constants (K₁ and K₂) and thermodynamic parameters (螖H and 螖S) of the coordination of pyridine were determined. The first X-ray analyses of a paramagnetic nickel chlorin and a nickel isobacteriochlorin provide further information about the structure of the octahedral complexes. Nickel chlorin and even more pronounced nickel isobacteriochlorin exhibit stronger coordination of axial ligands compared to the corresponding nickel porphyrin and thus provide the basis for more efficient spin-switching systems.