Chromophores, light absorption metal

Of experimental methods for studying the metal in enzymes, light absorption in the visible region from molybdenum chromophores is likely to be weak and frequently masked by stronger absorption from other enzyme constituents. Indeed only recently has a small molybdenum contribution to the absorption spectrum of even the most studied of these enzymes, xanthine oxidase, been demonstrated 33, see Section V F). 

Light Absorption by Surface-Located Chromophores Incorporating the Metal of the Oxice Lattice... 

Other uses of nanostructured chromophores may include fluorescent nanoparticles or nanoparticle-based porous materials that change their light absorption or emission when a toxin is encountered. Some metal oxides and POMs already exhibit such properties. Likewise, electrochemical properties, including induced photocurrents, could be sensitive to encountering a toxin. Clearly, both decontamination and detection are relevant aspects here. Basic research is needed on the design and synthesis of engineered nanostructures whose electronic structures, thermal catalytic, photophysical (emission), and photocatalytic properties are strongly perturbed by the presence or absence of toxic compounds. 

Chromophore. Atoms or ions whose arrangement of electrons leads to selective absorption of particular wavelengths of light, and so imparts colour to their compounds, which may be used as pigments (q.v.). Typical chromophores are multivalent metals such as Co, V. In lattice colours the chromophore forms part of the crystal lattice. See also encapsulated... 

Antenna ligand A ligand containing a chromophore capable of strong light absorption and of then transferring the energy of excitation to a bound metal ion. 

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