A new class of solvatochromic material: Geometrically unsaturated Ni (II) complexes

作者：Selvakumar P Mosae; Nadella S; Froehlich R; Albrecht M; Subramanian P S^*

来源：Dyes and Pigments, 2012, 95(3): 563-571.

DOI：10.1016/j.dyepig.2012.05.008

• Pyridine ligands
• Nickel(II)
• Binuclear complexes
• Double stranded helicates
• Solvent coordination
• Solvatochromism

A series of Ni(II) double stranded binuclear complexes were synthesized upon treating the Ni(II) salts with series of diamino-bis-pyridine ligands, L1H2-L4H2 in 1:1 stiochiometric ratio. The Ni(II) centers existing in octahedral geometry, four of the coordination sites are occupied by two ligand strands, while the remaining two sites are occupied by solvent molecules in each metal centers. The Ni(II) complexes 1a-4a and 1b-4b are binuclear in nature with ClO4 and PF6 counter ions. The crystal structure obtained for complex 1b ascertains the solvent coordination. Solvatochromism though a well established phenomena, such observation is reported first time in the present manuscript in the area of helicate chemistry. Thus the manuscript elicits the solvatochromic property of geometrically unsaturated helicates, by appropriately tuning the d-d transition, adapting suitable solvents.

• 出版日期2012-12
• 单位海洋化工研究院有限公司