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  1. More Images

    Chromophore

    A chromophore is a molecule which absorbs light at a particular wavelength and reflects color as a result. Chromophores are commonly referred to as colored molecules for this reason. The word is derived from Ancient Greek χρῶμᾰ 'color' and -φόρος 'carrier of'. Many molecules in nature are chromophores, including chlorophyll, the molecule responsible for the green colors of leaves. The color that is seen by our eyes is that of the light not absorbed by the reflecting object within a certain wavelength spectrum of visible light. The chromophore indicates a region in the molecule where the energy difference between two separate molecular orbitals falls within the range of the visible spectrum. Visible light that hits the chromophore can thus be absorbed by exciting an electron from its ground state into an excited state. In biological molecules that serve to capture or detect light energy, the chromophore is the moiety that causes a conformational change in the molecule when hit by light. Wikipedia

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  2. en.wikipedia.org

    Leaves change color in the fall because their chromophores (chlorophyll molecules) break down and stop absorbing red and blue light.[1]A chromophore is a molecule which absorbs light at a particular wavelength and reflects color as a result. Chromophores are commonly referred to as colored molecules for this reason. The word is derived from Ancient Greek χρῶμᾰ (chroma) 'color' and ...
  3. sciencedirect.com

    All the molecules absorb electromagnetic radiation, but differences in the specific absorbed wavelengths. Some molecules show light absorption in the visible spectrum (400-800 nm), and as a result they are themselves colored. The dyes are molecules having delocalized electron systems with conjugated double bonds, which contain two groups: the chromophore and the auxochromic.
  4. sciencedirect.com

    Chromophores are molecules in a given material that absorb particular wavelengths of visible light, and in doing so confer colour on the material. In wool there are several ultraviolet (UV) chromophores present in the form of the aromatic amino acid residues tryptophan (Trp), tyrosine (Tyr) and phenylalanine (Phe), and also cystine (Cys) which can absorb light in the region between 250 and 320 nm.
  5. link.springer.com

    'Chromophore' published in 'Encyclopedia of Color Science and Technology' Chromophores and Conjugation in Organic Colorants. Examples of well-known chromophores in color chemistry are shown in Fig. 1, which include simple (nitro, azo, and methine) and more complex (anthraquinone and triarylmethane) systems.About 70% of synthetic dyes have the azo chromophore, with anthraquinone dyes comprising ...
  6. Fluorophores and chromophores are chemical substances that are responsible for various visible effects in compounds. A look at the salient features of fluorophores and chromophores offers a clear indication of the differences between the two.
  7. sciencedirect.com

    2. The auxochrome includes charged and uncharged groups of atoms which are covalently attached to the chromophore skeleton of the dye molecule, for example, -COOH, -OH, -OR, -NH 2, -NHR, -NR 2, -X, and -SO 3 H [27].Unlike chromophores, auxochromes cannot undergo π-π* transitions, therefore, they do not show absorption above 200 nm by themselves.
  8. nl.wikipedia.org

    De chromofoor, letterlijk: kleurdrager is het gedeelte van het molecuul dat verantwoordelijk is voor de absorptie van licht in het zichtbare en ultraviolette deel van het elektromagnetische spectrum.Vooral in organische stoffen is een semi-empirische regel ontwikkeld voor de relatie tussen het absorptiemaximum in het spectrum en de structuur van het molecuul.
  9. pmc.ncbi.nlm.nih.gov

    Abstract. Absorption and reduced scattering coefficients of in-vivo human skin provide critical information on non-invasive skin diagnoses for aesthetic and clinical purposes. To date, very few in-vivo skin optical properties have been reported. Previously, we reported absorption and scattering properties of in-vivo skin in the wavelength range from 650 to 1000nm using the diffusing probe in ...
  10. De chromofoor, letterlijk: kleurdrager is het gedeelte van het molecuul dat verantwoordelijk is voor de absorptie van licht in het zichtbare en ultraviolette deel van het elektromagnetische spectrum. Vooral in organische stoffen is een semi-empirische regel ontwikkeld voor de relatie tussen het absorptiemaximum in het spectrum en de structuur ...

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