New di-ferrocenyl-ethynylpyridinyl triphenylphosphine copper halide complexes and related di-ferricenyl electro-crystallized materials

摘要: Three new neutral di-ferrocenyl-ethynylpyridinyl copper complexes, [L2(CuCl)2(PPh3)2] (2), [L2(CuBr)2(PPh3)2] (3), and [L2(CuI)2(PPh3)2] (4) were synthesized from the ferrocenyl-ethynylpyridine ligand (L) (1), appropriate halide CuX (with X = Cl−, Br−, I−) triphenylphosphine. These complexes fully characterized by spectroscopic methods single crystal X-ray crystallography. Cyclic voltammetry in dichloroethane revealed chemically reversible ferrocenyl oxidation signals followed characteristic “stripping reduction peaks” showing evidence for oxidation-product electro-crystallization. Scanning electron microscopy confirmed spontaneous formation of crystalline products with three distinct morphologies I−. Energy dispersive elemental analysis data show Fe : P ratios 1 : 2.0, 1 : 2.1 electro-crystallization 2, 3, 4, respectively, indicating presence two [PF6]− anions vicinity dioxidized suggesting product formulae [2]2+[PF6]−2, [3]2+[PF6]−2 [4]2+[PF6]−2.