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Zinc complexes luminescent

Blue luminescence of zinc complexes of pyridyl-containing complexes is an area of current interest.277 Design of blue luminescent materials is of relevance to display applications, as blue-light-emitting diodes, and to this end Che examined solution luminescence of zinc pyridylamine complexes.73,278 Che and co-workers studied the complex Zn40(7-azaindoyl)6 which has a blue emission at 433 nm in the solid state.279,280 In an attempt to improve on stability Wang et al. examined compounds with neutral 7-azaindole and an A-functionalized pyridyl derivative.281 In contrast with other metal complexes of the neutral 7-azaindole (32), Zn(7-azaindole)2(OAc)2 is a blue luminescent compound and a A-(2-pyridyl) 2-azaindole (33) and its complexes were also... [Pg.1167]

Luminescence is observed from coordination complexes of first row transition metals less often than from complexes of second or third row metals. This is a result of the presence of low-energy ligand field (LF) states into which the excitation is funneled that can rapidly deactivate through either non-radiative pathways to the ground state or photo-reaction pathways to products. Recent reports relating to the luminescence of titanium," chromium", and zinc complexes provide examples of new emissive first row coordination compounds. [Pg.320]

The design and studies involving the ligand itself directly forming part of the diarylethene framework, which should possess a greater perturbation and interaction between the metal center and the photochromic moiety, were also reported recently. Luminescence modulation with these ligands has also been demonstrated. In a zinc complex... [Pg.1995]

A number of workers have studied zinc tetraphenylporphyrin complexes, and an intensive study of the luminescence properties of [ZnTPP] has been reported.1180 [ZnTPP] is also used in the well-known synthetic leaf experiments.11806... [Pg.995]

When Nd or Yb complexes of a similar macrocycle are covalently linked to a palladium porphyrin complex, this sensitizes near-IR emission from the lanthanide, enhanced in the absence of oxygen and in the presence of a nucleic acid7 Another application of luminescence accompanies the terbium complex shown in (39) whose luminescence is enhanced by binding to zinc, and can therefore signal for that metal. " ... [Pg.153]

Room-temperature tetrahedral zinc(II) complexes with polycatenar pyrazole or bis(pyrazolyl)methane hgands show luminescence in the near ultraviolet and blue spectral regions (Figure 2.42). ° A broad, structureless emission band with a large Stokes shift was observed. The emission bands were found to red-shift with an increase in the number of... [Pg.92]

Figure 2.42 Luminescent mesomorphic tetrahedral zinc(II) complexes with poly-catenar pyrazole ligands (a) or bis(pyrazolyl)methane ligands (b)... Figure 2.42 Luminescent mesomorphic tetrahedral zinc(II) complexes with poly-catenar pyrazole ligands (a) or bis(pyrazolyl)methane ligands (b)...

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See also in sourсe #XX -- [ Pg.92 , Pg.94 ]




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