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1,15‐Diferrocenyl‐2,5,8,11,14‐pentaazapentadecane, an Open‐Chain Redox‐Active Ferrocene‐Functionalized Polyazaalkane Ligand for Anions
Author(s) -
Lloris José M.,
MartínezMáñez Ramón,
PadillaTosta Miguel E.,
Pardo Teresa,
Soto Juan
Publication year - 1999
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/(sici)1522-2675(19990908)82:9<1445::aid-hlca1445>3.0.co;2-#
Subject(s) - chemistry , ferrocene , chain (unit) , ligand (biochemistry) , redox , combinatorial chemistry , polymer chemistry , stereochemistry , organic chemistry , electrochemistry , electrode , receptor , biochemistry , physics , astronomy
The interaction of the ferrocene‐functionalized open‐chain polyazaalkane 1,15‐diferrocenyl‐2,5,8,11,14‐pentaazapentadecane (L 1 ) with the sulfate, phosphate, and ATP anions has been studied by potentiometric methods in THF/H 2 O 70 : 30 ( v / v ) (containing 0.1 M (Bu 4 N)ClO 4 at 25°). Additionally, the electrochemical response of L 1 in the presence of H + , HSO ‐ 4 , H 2 PO ‐ 4 , Br − , and Cl − in a non‐aqueous solvent such as MeCN has been studied. A remarkable cathodic shift of the ferrocene oxidation potential was induced for phosphate (198 mV) and sulfate (145 mV) showing an EC mechanistic response. Competitive electrochemical studies showed that L 1 is able to electrochemically and selectively recognize HSO ‐ 4 vs . H 2 PO ‐ 4 in a mixture of both anions in MeCN.