Home
Resources
Publications
Triphosphate Ion-Selective Electrode Based on Zr-Porphyrin Complex

Triphosphate Ion-Selective Electrode Based on Zr-Porphyrin Complex

Yuma Yagi, Shuhei Masaki, Tetsuki Iwata, Daisuke Nakane, Takashi Yasui, Akio Yuchi

Anal Chem. 2017 Apr 4;89(7):3937-3942.

PMID: 28266211

Abstract:

Ion-selective electrode using zirconium(IV) complex with octaethylporphin (H2oep) as a carrier showed high selectivity to triphosphate (TP, H5tp) against other hydrophilic anions including diphosphate and phosphate. The electroactive species was identified to be [(Zr4(oep)4(Htp)2] (TP/Zr ratio of 0.5) of the unique structure; triphosphates are recognized by one Zr atom through three O atoms on three different P atoms and by another Zr atom through two O atoms on two terminal P atoms and are also involved in complementary intermolecular hydrogen bonding to be surrounded by four porphyrin complexes. In contrast, Zr(IV) in the other complex with tetraphenylporphin has the higher Lewis acidity, due to the electron-withdrawing property of phenyl rings and, at the higher TP concentration, forms a species having a TP/Zr ratio of unity, which precipitates to lose the electroactivity. The electrode was successfully applied to monitor hydrolysis of TP that provides diphosphate and phosphate.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP13772297	Zirconium(IV) hydrogenphosphate		13772-29-7	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: