Perylenetetracarboxylic dianhydride

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Perylenetetracarboxylic dianhydride
Skeletal formula of PTCDA
Other names
Perylene-3,4,9,10-tetracarboxylic dianhydride, Pigment Red 224
3D model (JSmol)
ECHA InfoCard 100.004.461
EC Number 204-905-3
Molar mass 392.32
Density 1.7 g/cm3
Melting point ~350 °C[1]
Monoclinic, P21/c
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Perylenetetracarboxylic dianhydride (PTCDA) is an organic dye molecule and an organic semiconductor. It is used as a precursor to a class of molecules known as Rylene dyes, which are useful as pigments and dyes, it is a dark red solid with low solubility in aromatic solvents. The compound has attracted much interest as an organic semiconductor.


PTCDA consists of a perylene core to which two anhydride groups have been attached, one at either side, it occurs in two crystalline forms, α and β.[2] Both have the P21/c monoclinic symmetry and a density of ca. 1.7 g/cm3, which is relatively high for organic compounds. Their lattice parameters are:

Form a b c γ
α 0.374 nm 1.196 nm 1.734 nm 98.8°
β 0.378 nm 1.930 nm 1.077 nm 83.6°

Self-assembly and films[edit]

Atomic force microscopy image of a single PTCDA molecule on Si at room temperature.[3]
Self-assembly of PTCDA molecules on NaCl, scanning tunneling microscopy image.[4]


The main industrial use of PTCDA is as a precursor to Rylene dyes.[5][6]


  1. ^ PTCDA.
  2. ^ Möbus, M. & Karl, N. (1992). "Structure of perylene-tetracarboxylic-dianhydride thin films on alkali halide crystal substrates". Journal of Crystal Growth. 116 (3–4): 495–504. doi:10.1016/0022-0248(92)90658-6.
  3. ^ Iwata, Kota; Yamazaki, Shiro; Mutombo, Pingo; Hapala, Prokop; Ondráček, Martin; Jelínek, Pavel; Sugimoto, Yoshiaki (2015). "Chemical structure imaging of a single molecule by atomic force microscopy at room temperature". Nature Communications. 6: 7766. doi:10.1038/ncomms8766. PMC 4518281. PMID 26178193.
  4. ^ Cochrane, K. A.; Schiffrin, A.; Roussy, T. S.; Capsoni, M.; Burke, S. A. (2015). "Pronounced polarization-induced energy level shifts at boundaries of organic semiconductor nanostructures". Nature Communications. 6: 8312. doi:10.1038/ncomms9312. PMC 4600718. PMID 26440933.
  5. ^ Hunger, K. and Herbst, W. (2012) "Pigments, Organic" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim. doi:10.1002/14356007.a20_371
  6. ^ Greene, M. (2009) "Perylene Pigments", pp. 261–274 in High Performance Pigments, Wiley-VCH, Weinheim.doi:10.1002/9783527626915.ch16