N749 Black Dye

250 mg

Order Code: M2001A1
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General Information

Full name Tris(N,N,N-tributyl-1-butanaminium) [[2,2′′6′,2′′-terpyridine]-4,4′,4′′-tricarboxylato(3-)-N1,N1′,N1′′]tris(thiocyanato-N)hydrogen ruthenate
Synonyms N749 Dye, Black dye, Ruthenium 620
Chemical formula C69H117N9O6RuS3
Molecular weight 1365.98
CAS number 359415-47-7
HOMO / LUMO HOMO = -5.2 eV, LUMO = -3.8 eV
Solubility Ethanol or acetonitrile/tert-butanol (v/v = 1)
Classification / Family Transition metal complex, Ruthenium complex, Bipyridyl ligands, Energy materials, Dye-sensitized solar cells DSSC) materials, Donor materials, OPV materials.

Product Details

Purity  >95%
Melting point No data available
Appearance Dark green powder


n749 dye
Chemical structure of N749 Dye; Chemical formula: C69H117N9O6RuS3.



N749, [(C4H9)4N]3[Ru(Htcterpy)(NCS)3], also referred to as "black dye", was developed for the widest range spectral sensitisation of wide band-gap oxide semiconductors (like titanium dioxide up to wavelengths beyond 800nm).  N749 black dye is a ruthenium complex, in which the ruthenium center contains one terpyridine ligand substituted with three carboxyl groups and three thiocyanato ligands

Despite its lower absorption extinction coefficient, a certified conversion efficiency of 11.1 % was achieved by employing a high-haze TiO2 electrode.


    Literature and Reviews

    1. Engineering of Efficient Panchromatic Sensitizers for Nanocrystalline TiO2-Based Solar Cells, M. K. Nazeeruddin et al., J. Am. Chem. Soc., 123 (8), 1613–1624 (2001); DOI: 10.1021/ja003299u.
    2. Acetonitrile Solution Effect on Ru N749 Dye Adsorption and Excitation at TiO2 Anatase Interface, Y. Tateyama et al., J. Phys. Chem. C, 118 (30), 16863–16871 (2014); DOI: 10.1021/jp5004006.
    3. Protonated Carboxyl Anchor for Stable Adsorption of Ru N749 Dye (Black Dye) on a TiO2 Anatase (101) Surface, K. Sodeyama et al., J. Phys. Chem. Lett., 3 (4), 472–477 (2012); DOI: 10.1021/jz201583n.
    4. Selective positioning of organic dyes in a mesoporous inorganic oxide film, K. Lee et al., Nat. Mater., 8, 665-671 (2009); doi:10.1038/nmat2475.
    5. Significant Efficiency Improvement of the Black Dye-Sensitized Solar Cell through Protonation of TiO2 Films, Z. Wang et al., Langmuir, 21 (10), 4272–4276 (2005); DOI: 10.1021/la050134w.