以三氮二氧配位基形成過氧亞硝酸鈷錯合物之鑑定
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2017
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本次研究利用H2BDPP及衍生物H2BDPBrP兩種N3O2配位基與鈷金屬離子反應形成CoIIBDPP (1)和CoIIBDPBrP (1')起始物。它們個別與氧氣反應會先形成CoIIIBDPP(O2) (2)及CoIIIBDPBrP(O2) (2')，再與一氧化氮反應會得到過氧亞硝酸三價鈷錯合物CoIIIBDPP(OONO) (3) 和CoIIIBDPBrP(OONO) (3') 。藉由紫外-可見光光譜(UV-vis)以及低溫即時紅外光譜(low temperature in-situ IR)說明錯合物3'的存在，錯合物3'會轉變成三價鈷與水鍵結的錯合物，可以四氫呋喃/乙醚擴散法得到[CoIIIBDPBrP(H2O)]NO3 (4')晶體，錯合物4'的硝酸根陰離子以15N標定其氮原子，並且利用電噴灑離子化質譜(ESI-Mass)、低溫核磁共振光譜(NMR)以及紅外光譜受到同位素影響產生震動位移證明這個產物。
In this study, N3O2 petadentate ligands H2BDPP and H2BDPBrP react with CoCl2 to form cobalt precursors, CoIIBDPP (1) and CoIIBDPBrP (1'). By reacting with O2, Complexes 1 and 1' were employed to generate CoIIIBDPP(O2) (2) and CoIIIBDPBrP(O2) (2'), which then react with NO to produce Co(III)-peroxynitrite complex, CoIIIBDPP(OONO) (3) and CoIIIBDPBrP(OONO) (3'). UV-vis and low temperature in-situ IR spectroscopies were performed to determined complex 3', which was converted into an aqua-bonded cobalt(III) complex, [CoIIIBDPBrP(H2O)]NO3 (4'), crystallized by THF/ether diffusion. The nitrate anions of 4' was characterized by 15N-labbelled ESI-MS and IR spectroscopy showing corresponding isotope shift. The formation of nitrate in 4' is suggested via a rearrangement of the peroxynitrite ligand.
In this study, N3O2 petadentate ligands H2BDPP and H2BDPBrP react with CoCl2 to form cobalt precursors, CoIIBDPP (1) and CoIIBDPBrP (1'). By reacting with O2, Complexes 1 and 1' were employed to generate CoIIIBDPP(O2) (2) and CoIIIBDPBrP(O2) (2'), which then react with NO to produce Co(III)-peroxynitrite complex, CoIIIBDPP(OONO) (3) and CoIIIBDPBrP(OONO) (3'). UV-vis and low temperature in-situ IR spectroscopies were performed to determined complex 3', which was converted into an aqua-bonded cobalt(III) complex, [CoIIIBDPBrP(H2O)]NO3 (4'), crystallized by THF/ether diffusion. The nitrate anions of 4' was characterized by 15N-labbelled ESI-MS and IR spectroscopy showing corresponding isotope shift. The formation of nitrate in 4' is suggested via a rearrangement of the peroxynitrite ligand.
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過氧亞硝酸, 鈷錯合物