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  2. Charge-transfer band - Wikipedia

    en.wikipedia.org/wiki/Charge-transfer_band

    Unlike the usual MLCT or LMCT bands, the IVCT bands are lower in energy, usually in the visible or near-infrared region of the spectrum and is broad. Prussian blue, the blue pigment derived from Fe(III), Fe(II), and cyanide, owes its intense color to IVCT.

  3. Charge-transfer complex - Wikipedia

    en.wikipedia.org/wiki/Charge-transfer_complex

    Structure of one part of one stack of the charge-transfer complex between pyrene and 1,3,5-trinitrobenzene. [1]In chemistry, charge-transfer (CT) complex, or electron donor-acceptor complex, describes a type of supramolecular assembly of two or more molecules or ions.

  4. Transition metal - Wikipedia

    en.wikipedia.org/wiki/Transition_metal

    For example, the colour of chromate, dichromate and permanganate ions is due to LMCT transitions. Another example is that mercuric iodide, HgI 2, is red because of a LMCT transition. A metal-to-ligand charge transfer (MLCT) transition will be most likely when the metal is in a low oxidation state and the ligand is easily reduced.

  5. Polypyridine complex - Wikipedia

    en.wikipedia.org/wiki/Polypyridine_complex

    Some complexes strongly absorb light via a process called metal-to-ligand charge transfer (MLCT). [1] The properties of these complexes can be tuned by changes in substituents. For example, electron donation, electron withdrawal, and π-conjugating groups, to the polypyridine moiety. The MLCT absorption band can be shifted, the emission ...

  6. Metal L-edge - Wikipedia

    en.wikipedia.org/wiki/Metal_L-edge

    This has the opposite effect on the system, resulting in metal-to-ligand charge transfer, MLCT, and commonly appears as an additional L-edge spectral feature. An example of this feature occurs in low-spin ferric [Fe(CN) 6] 3−, since CN − is a ligand that can have backbonding. While backbonding is important in the initial state, it would ...

  7. Transition metal complexes of 2,2'-bipyridine - Wikipedia

    en.wikipedia.org/wiki/Transition_metal_complexes...

    The electronic transitions are attributed to metal-to-ligand charge transfer (MLCT). In the "tris(bipy) complexes" three bipyridine molecules coordinate to a metal ion, written as [M(bipy) 3] n+ (M = metal ion; Cr, Fe, Co, Ru, Rh and so on). These complexes have six-coordinated, octahedral structures and exists as enantiomeric pairs:

  8. Magnetic circular dichroism - Wikipedia

    en.wikipedia.org/wiki/Magnetic_circular_dichroism

    As shown in figure 1, the molecular orbital diagram of [(n-C 4 H 9) 4 N] 2 Pt(CN) 4 reveals MLCT into the antibonding π* orbitals of cyanide. The ground state is diamagnetic (thereby eliminating any C-terms) and the LUMO is the a 2u. The dipole-allowed MLCT transitions are a 1g-a 2u and e g-a 2u.

  9. Tris(bipyridine)ruthenium(II) chloride - Wikipedia

    en.wikipedia.org/wiki/Tris(bipyridine)ruthenium...

    Tris(bipyridine)ruthenium(II) chloride is the chloride salt coordination complex with the formula [Ru(bpy) 3]Cl 2.This polypyridine complex is a red crystalline salt obtained as the hexahydrate, although all of the properties of interest are in the cation [Ru(bpy) 3] 2+, which has received much attention because of its distinctive optical properties.