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Volumn 47, Issue 22, 2008, Pages 10407-10418

Structural and photophysical characterization of multichromophoric pyridylporphyrin-rhenium(I) conjugates

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EID: 57149121681     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic800971e     Document Type: Article
Times cited : (42)

References (59)
  • 44
    • 0031059866 scopus 로고    scopus 로고
    • In Processing of X-ray Diffraction Data Collected in Oscillation Mode
    • Carter, C. W, Jr, Sweet, R. M, Eds, Academic Press: New York
    • Otwinowski, Z.; Minor, W. In Processing of X-ray Diffraction Data Collected in Oscillation Mode; Carter, C. W., Jr., Sweet, R. M., Eds.; Methods in Enzymology, Macromolecular Crystallography Part A; Academic Press: New York, 1997; Vol. 276, pp 307-326.
    • (1997) Methods in Enzymology, Macromolecular Crystallography Part A , vol.276 , pp. 307-326
    • Otwinowski, Z.1    Minor, W.2
  • 47
    • 57149083383 scopus 로고    scopus 로고
    • Presumably for the same reason, 6 turns green (from purple) in the solid state upon drying
    • Presumably for the same reason, 6 turns green (from purple) in the solid state upon drying.
  • 48
    • 0000823277 scopus 로고    scopus 로고
    • Concentration-dependent self-assembly of zincated pyridylporphyrins is known to occur spontaneously in noncoordinating solvents through axial Zn-N(pyridyl) interactions see Fleischer, E, Shachter, A. M. Inorg. Chem. 1991, 30, 3763-3769, Indeed, the absorption and emission spectra of Zn·4′MPyP and Zn·3′MPyP in CH 2Cl2 solutions were found to be concentration-dependent. Reference spectra were taken for concentrations below 10-5 M, where no further changes were observed upon dilution. In these conditions, Zn·4′MPyP and Zn·3′MPyP showed spectral patterns and photophysical behaviors almost identical to Zn·TPP that was therefore selected as reference compound
    • -5 M, where no further changes were observed upon dilution. In these conditions, Zn·4′MPyP and Zn·3′MPyP showed spectral patterns and photophysical behaviors almost identical to Zn·TPP that was therefore selected as reference compound.
  • 49
    • 57149091654 scopus 로고    scopus 로고
    • 1H NMR spectrum was monitored in time. Only after one day, very weak signals corresponding to the resonances of free Zn·4′MPyP started to appear, indicating that the Re-PyP bond has an excellent kinetic stability.
    • 1H NMR spectrum was monitored in time. Only after one day, very weak signals corresponding to the resonances of free Zn·4′MPyP started to appear, indicating that the Re-PyP bond has an excellent kinetic stability.
  • 51
    • 57149099301 scopus 로고    scopus 로고
    • Similarly to what reported by Gust and co-workers for the Zn·TPP chromophore (ref 26), the addition of pyridine caused small but significant spectral shifts (ca. 15 nm) in the absorption (Q region) as well as in the emission spectra of the dyad 5, clearly indicating the coordination of pyridine to the zinc center.
    • Similarly to what reported by Gust and co-workers for the Zn·TPP chromophore (ref 26), the addition of pyridine caused small but significant spectral shifts (ca. 15 nm) in the absorption (Q region) as well as in the emission spectra of the dyad 5, clearly indicating the coordination of pyridine to the zinc center.
  • 55
    • 57149091465 scopus 로고    scopus 로고
    • No correction for electrostatic work terms is required in this case because of the charge shift character of the process involved
    • No correction for electrostatic work terms is required in this case because of the charge shift character of the process involved.
  • 58
    • 57149083987 scopus 로고    scopus 로고
    • Remarkably, the increase of the extent of quenching (τ°/τ) with increasing the number of rhenium centers from one to four (see Table 6) is the same as that observed for the corresponding free base adducts (see ref16).
    • Remarkably, the increase of the extent of quenching (τ°/τ) with increasing the number of rhenium centers from one to four (see Table 6) is the same as that observed for the corresponding free base adducts (see ref16).


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