Water-soluble sensors for transition metals ferrocene polyazamacrocycles

WATER-SOLUBLE SENSORS FOR TRANSITION METALS FERROCENE POLYAZAMACROCYCLES 

The addition of stoichiometric amounts of Ni2+, Cu2+ and Zn2+ to solutions of [28]-[32] in acetonitrile led to large anodic shifts of the respective ferrocene/ferrocenium redox couple of up to 190 mV in the case of [29] and Cu2+ (Table 8). Analogous experiments in water at pH values 10.5-12 revealed that [28]—[32] electrochemically recognize these transition metal cations in the aqueous environment (Table 9). 

When an equimolar mixture of Ni2+, Cu2+ and Zn2+ was added to aqueous electrochemical solutions of [29] and [30] the ferrocene-ferrocenium redox couple shifted anodically by an amount approximately the same as that induced by the Cu2+ cation alone. This result suggests that [29] and [30] are 

Lowe and Garner (1993a,b) have synthesized three new dithiolene ligands and formed complexes with a variety of transition metals (Fig. 23) including molybdenum [40]-[42], tungsten [43] and [44] and nickel [45]—[48]. The electrochemical properties of the complexes and free ligands were studied by 

CV and the results appear to indicate variations in the degree of delocalization in the metallodithiolene ring. 

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Water-soluble sensors for transition metals ferrocene polyazamacrocycles 28 Reducible cation sensors 35... 

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