메뉴 건너뛰기




Volumn 249, Issue 3-4 SPEC. ISS., 2005, Pages 313-328

Water oxidation catalyzed by dimeric μ-oxo bridged ruthenium diimine complexes

Author keywords

Oxo ions; Redox reactions; Ruthenium complexes; Water oxidation catalysis

Indexed keywords

BIPYRIDINE; DIMER; MONOMER; OXIDIZING AGENT; PYRIDINE DERIVATIVE; RUTHENIUM COMPLEX; RUTHENIUM DIIMINE; UNCLASSIFIED DRUG; WATER;

EID: 11844254390     PISSN: 00108545     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ccr.2004.06.017     Document Type: Review
Times cited : (187)

References (108)
  • 55
    • 11844253992 scopus 로고    scopus 로고
    • note
    • The activity measured by Doppelt and Meyer was so low that they could not exclude the possibility that it was derived from impurities in the preparation.
  • 62
    • 11844269440 scopus 로고    scopus 로고
    • note
    • s [46]. This cannot be ascribed simply to a larger bending angle, however, because in this oxidation state, the RuO lengths in the RuORu unit are also unequal [58], i.e., the stretching mode is inherently asymmetric regardless of the bending angle. Consequently, the O atom will also move in this mode when the RuORu bond is linear.
  • 68
    • 11844250109 scopus 로고    scopus 로고
    • note
    • These oxidation states were confirmed by another experiment in which equimolar solutions of the {3,3} and electrochemically prepared {5,5} ions were mixed to give a solution whose spectrum was that of the intermediate ({4,4}) [49]. Had either the most highly oxidized species not been {5,5} or the intermediate been {4,5}, the product solution would have contained significant amounts of {3,4}, which is readily detectable in the optical spectra.
  • 69
    • 11844285822 scopus 로고    scopus 로고
    • note
    • 2, {3,3} would be rapidly oxidized in additional steps to {4,4}. In general, because redox cross-reactions between the complexes are rapid relative to decomposition of the {5,5} [41,42], the distribution of oxidation states will reflect the overall redox poise of the solution at any point in time.
  • 75
    • 11844262205 scopus 로고    scopus 로고
    • note
    • 3H. Meyer and coworkers report complex precipitation also occurs under certain circumstances in triflate-containing media [42], although we have never observed this.
  • 90
    • 11844268244 scopus 로고    scopus 로고
    • note
    • 4+ [59].
  • 91
    • 11844250107 scopus 로고    scopus 로고
    • note
    • 4+.
  • 92
    • 11844291506 scopus 로고    scopus 로고
    • note
    • 2 evolution. Since the concentration levels of this intermediate would necessarily be very low and exchange at the cis-positions in other higher oxidation states of the μ-oxo ion is undetectably slow, this mechanism is not very appealing. It, however, cannot presently be excluded.
  • 99
    • 11844303043 scopus 로고    scopus 로고
    • note
    • The {4,4} ion is either even-spin or diamagnetic, and would not be expected to give an X-band epr signal. This signal could arise from the {4,5} ion if the one-electron reduction potentials of the {3,4} and {4,4} ions exhibited temperature dependencies that favored {4,4} accumulation at room temperature and {4,5} accumulation at low temperatures.
  • 100
    • 11844293592 scopus 로고    scopus 로고
    • note
    • - should occur preferentially at the ring 4-position [23-25].


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.