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Electronic Effect on Catalytic Water Oxidation by Single Site [Ru(QCl–tpy)(bpy)(OH 2 )] 2+ Catalyst
Author(s) -
Patel Jully,
Majee Karunamay,
Ahmad Ejaz,
Vatsa Aditi,
Das Babulal,
Padhi Sumanta Kumar
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601914
Subject(s) - catalysis , chemistry , overpotential , deprotonation , ligand (biochemistry) , electrochemistry , turnover number , ruthenium , medicinal chemistry , inorganic chemistry , photochemistry , electrode , organic chemistry , ion , biochemistry , receptor
The mononuclear [Ru(QCl‐tpy)(bpy)(H 2 O)](PF 6 ) 2 was successfully synthesized and characterized by using several spectroscopic techniques (QCl‐tpy=2‐4′‐(2‐chloroquinolin‐3‐yl)‐2,2′:6′,2′′‐terpyridine). This complex shows only one pK a value at 10.2, due to the deprotonation from the bonded aqua ligand. This complex was successfully employed as a catalyst for chemical water oxidation in CF 3 SO 3 H solution (pH 1.0) by using Ce IV as an oxidant, shows initial turnover frequency (TOF) of 0.0014 s −1 . The manometry and electrochemical data shows that this complex is a better catalyst having turnover number (TON) 19 (out of 25) and overpotential of 600 mV. As compared to the parent Ru(tpy)(bpy)(H 2 O)](PF 6 ) 2 a higher catalytic effect was observed by complex 1 , which is expected due to the cause of electronic effect dominating towards electron donating behavior.