Spectroscopic and electrochemical behavior of a supramolecular tetrapyridylporphyrin encompassing four terpyridine(oxalate)chloridoruthenium(II) complexes and its use in nitrite sensors

摘要: Abstract Supramolecular species combining ruthenium(II) polypyridines and tetrapyridylporphyrins (TPyP) have been employed in electrochemical molecular sensing devices, because of their unique synergistic properties. In this work, a new tetraruthenated porphyrin, 4-TRoxPyP has synthesised, encompassing four pyridine bridged [Ru(Cl-tpy)(ox)] complexes (Cl-tpy = chloroterpyridine, ox = oxalate ion). Such exhibit characteristic electronic transitions porphyrin ruthenium polypyridine complexes, such as Soret band at 414 nm, Q bands 514 nm, 557 nm 588 nm ruthenium-to-terpy charge-transfer 643 nm. A typical redox process observed 0.72 V versus NHE, associated with the peripheral Ru 3+/2+ complexes. Their thin films prepared by drop casting onto glassy carbon electrode, successfully nitrite analysis, monitoring chronoamperometric response gate. linear relationship between anodic peak current concentration analyte from 0 to 0.10 mmol L −1 , detection limit 7.60 μmol L .