2005
DOI: 10.1021/ic0513538
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UV−Vis, NMR, and Time-Resolved Spectroscopy Analysis of Photoisomerization Behavior of Three- and Six-Azobenzene-Bound Tris(bipyridine)cobalt Complexes

Abstract: The photoisomerization properties of tris(bipyridine)cobalt complexes containing six or three azobenzene moieties, namely, [Co(II)(dmAB)3](BF4)2 [dmAB = 4,4'-bis[3''-(4'''-tolylazo)phenyl]-2,2'-bipyridine], [Co(III)(dmAB)3](BF4)3, [Co(II)(mAB)3](BF4)2 [mAB = 4-[3' '-(4' ''-tolylazo)phenyl]-2,2'-bipyridine], and [Co(III)(dmAB)3](BF4)3, derived from the effect of gathering azobenzenes in one molecule and the effect of the cobalt(II) or cobalt(III) ion were investigated using UV-vis absorption spectroscopy, femto… Show more

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Cited by 49 publications
(27 citation statements)
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“…[23][24][25] Various methods for suppressing AB transǞcis photoisomerization have also been reported. By introducing a redox active metal ion such as iron or cobalt coordinated onto an AB-functionalized ligand, metal oxidation state changes shift the AB absorption maximum (λ max ), which causes both isomers to absorb strongly at the same wavelength.…”
Section: Introductionmentioning
confidence: 99%
“…[23][24][25] Various methods for suppressing AB transǞcis photoisomerization have also been reported. By introducing a redox active metal ion such as iron or cobalt coordinated onto an AB-functionalized ligand, metal oxidation state changes shift the AB absorption maximum (λ max ), which causes both isomers to absorb strongly at the same wavelength.…”
Section: Introductionmentioning
confidence: 99%
“…[1][2][3][4] Azobenzene has been appended to a number of chromophores, including transition metal complexes, in an attempt to couple the E/Z isomerization process to an external electronic transition. [5][6][7][8][9][10][11][12][13] Transition metal compounds that exhibit metal to ligand charge transfer transitions (MLCT), as seen in many d 6 metal complexes, are ideal for transferring energy to an external group. [14][15][16][17][18] In this report, we present a study of two Re(CO) 3 diimine complexes with a pendant azobenzene group.…”
Section: Re(co) 3 Conjugates 1 and 2 That Incorporate Azobenzenes Canmentioning
confidence: 99%
“…The dyes have been most widely used in fields such as dying textile fibers, biomedical studies, advanced applications in organic synthesis and high technology areas like lasers, liquid crystalline displays, electrooptical devices and ink-jet printer [7]. The presence of\ \N_N\ \ group can lead to increase the solubility of low valent metal oxidation states due to its π acidity and presence of low lying azo centered π* molecular orbitals [8].…”
Section: Introductionmentioning
confidence: 99%