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Chromophores hydrogen bonds

Keywords Dyes Chromophores Hydrogen bonds Self-assembly ... [Pg.83]

Ultraviolet absorption spectra of tetrahy dro-1,3-oxazines do not show any maximum. Only after the introduction of a chromophoric group do bands appear. Thus 5-nitro derivatives show a strong maximum near 270 m/A, which is typical for a nitro group, and another one near 200 m(x which is probably also produced by the nitro group.In the instance of 5-nitro-5-hydroxymethyl derivatives, the absorption is much weakened this was explained by Urbanski in terms of a hydrogen bond between the hydroxyl and the nitro group. Other chromophores, such as C=0, C=NH, C—C, also cause the appearance of absorption maxima in the range 210-265 m/A and near 360... [Pg.338]

Chen KY, Cheng YM, Lai CH et al (2007) Ortho green fluorescence protein synthetic chromophore Excited-state intramolecular proton transfer via a seven-membered-ring hydrogen-bonding system. J Am Chem Soc 129 4534 -535... [Pg.264]

See other pages where Chromophores hydrogen bonds is mentioned: [Pg.360]    [Pg.248]    [Pg.360]    [Pg.248]    [Pg.191]    [Pg.535]    [Pg.150]    [Pg.83]    [Pg.85]    [Pg.260]    [Pg.204]    [Pg.208]    [Pg.211]    [Pg.214]    [Pg.76]    [Pg.117]    [Pg.122]    [Pg.369]    [Pg.633]    [Pg.13]    [Pg.14]    [Pg.14]    [Pg.14]    [Pg.20]    [Pg.7]    [Pg.225]    [Pg.237]    [Pg.246]    [Pg.247]    [Pg.251]    [Pg.317]    [Pg.359]    [Pg.361]    [Pg.363]    [Pg.364]    [Pg.368]    [Pg.369]    [Pg.370]    [Pg.157]    [Pg.192]    [Pg.192]    [Pg.175]    [Pg.457]    [Pg.249]    [Pg.250]    [Pg.302]    [Pg.384]    [Pg.409]   
See also in sourсe #XX -- [ Pg.83 ]



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