Phthalocyanine

Source: Wikipedia, the free encyclopedia.
Phthalocyanine
Skeletal formula
Ball-and-stick model
Names
Other names
  • Phthalocyanin
  • Pigment Blue 16
Identifiers
3D model (
JSmol
)
ChEBI
ChemSpider
ECHA InfoCard
 100.008.527 Edit this at Wikidata
UNII
  • InChI=1S/C32H18N8/c1-2-10-18-17(9-1)25-33-26(18)38-28-21-13-5-6-14-22(21)30(35-28)40-32-24-16-8-7-15-23(24)31(36-32)39-29-20-12-4-3-11-19(20)27(34-29)37-25/h1-16H,(H2,33,34,35,36,37,38,39,40) ☒N
    Key: IEQIEDJGQAUEQZ-UHFFFAOYSA-N ☒N
  • InChI=1/C32H18N8/c1-2-10-18-17(9-1)25-33-26(18)38-28-21-13-5-6-14-22(21)30(35-28)40-32-24-16-8-7-15-23(24)31(36-32)39-29-20-12-4-3-11-19(20)27(34-29)37-25/h1-16H,(H2,33,34,35,36,37,38,39,40)
    Key: IEQIEDJGQAUEQZ-UHFFFAOYAC
  • C1=CC=C2C(=C1)C3=NC4=C5C=CC=CC5=C(N4)N=C6C7=CC=CC=C7C(=N6)N=C8C9=CC=CC=C9C(=N8)N=C2N3
Properties
C32H18N8
Molar mass 514.552 g·mol−1
Hazards
GHS labelling:
GHS07: Exclamation mark[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Phthalocyanine (H2Pc) is a large, aromatic, macrocyclic, organic compound with the formula (C8H4N2)4H2 and is of theoretical or specialized interest in chemical dyes and photoelectricity.

It is composed of four

catalysis, organic solar cells, and photodynamic therapy
.

Properties

HOMO/LUMO bands rather than atomic profiles.[2]

Phthalocyanine and derived metal complexes (MPc) tend to aggregate and, thus, have low solubility in common solvents.

near infrared
).

There are many derivatives of the parent phthalocyanine, where either carbon atoms of the macrocycle are exchanged for nitrogen atoms or the peripheral hydrogen atoms are substituted by functional groups like

nitrosyl groups. These modifications allow for the tuning of the electrochemical properties of the molecule such as absorption and emission wavelengths and conductance.[6]

History

In 1907, an unidentified blue compound, now known to be phthalocyanine, was reported.[7] In 1927, Swiss researchers serendipitously discovered copper phthalocyanine, copper naphthalocyanine, and copper octamethylphthalocyanine in an attempted conversion of o-dibromobenzene into phthalonitrile. They remarked on the enormous stability of these complexes but did not further characterize them.[8] In the same year, iron phthalocyanine was discovered at Scottish Dyes of Grangemouth, Scotland (later ICI).[9] It was not until 1934 that Sir Patrick Linstead characterized the chemical and structural properties of iron phthalocyanine.[10]

Synthesis

Phthalocyanine is formed through the cyclotetramerization of various phthalic acid derivatives including phthalonitrile, diiminoisoindole, phthalic anhydride, and phthalimides.[11] Alternatively, heating phthalic anhydride in the presence of urea yields H2Pc.[12] Using such methods, approximately 57,000 tonnes (63,000 Imperial tons) of various phthalocyanines were produced in 1985.[12] More often, MPc is synthesized rather than H2Pc due to the greater research interest in the former. To prepare these complexes, the phthalocyanine synthesis is conducted in the presence of metal salts. Two copper phthalocyanines are shown in the figure below.

CuPc with chlorine, bromine or oleum
.

Applications

Sample of copper phthalocyanine, illustrating the intense color characteristic of phthalocyanine derivatives.
See also: Copper phthalocyanine

At the initial discovery of Pc, its uses were primarily limited to dyes and pigments.[13] Modification of the substituents attached to the peripheral rings allows for the tuning of the absorption and emission properties of Pc to yield differently colored dyes and pigments. There has since been significant research on H2Pc and MPc resulting in a wide range of applications in areas including photovoltaics, photodynamic therapy, nanoparticle construction, and catalysis.[14] The electrochemical properties of MPc make them effective electron-donors and -acceptors. As a result, MPc-based organic solar cells with power conversion efficiencies at or below 5% have been developed.[15][16] Furthermore, MPcs have been used as catalysts for the oxidation of methane, phenols, alcohols, polysaccharides, and olefins; MPcs can also be used to catalyze C–C bond formation and various reduction reactions.[17] Silicon and zinc phthalocyanines have been developed as photosensitizers for non-invasive cancer treatment.[18]

Various MPcs have also shown the ability to form nanostructures which have potential applications in electronics and

biosensing.[19][20][21] Phthalocyanine is also used on some recordable DVDs.[22]

Toxicity and hazards

No evidence has been reported for acute toxicity or carcinogenicity of phthalocyanine compounds. The LD50 (rats, oral) is 10 g/kg.[12]

Related compounds

Phthalocyanines are structurally related to other

conjugate base of H2Pc.

Relationship of the phthalocyanine with the porphyrin macrocycle. Two intramacrocyclic N-H groups are omitted.

Footnotes

  1. ^ One "isoindole unit" is C8H4N2; four in a nitrogen-ring configuration are abbreviated as symbol Pc = (C8H4N2)4 .

References

  1. ^ "Pigment blue 16". pubchem.ncbi.nlm.nih.gov. Pubchem. U.S.
    National Institute of Health. Archived
    from the original on 2017-11-07. Retrieved 2018-04-08.
  2. ^ Iannuzzi, Marcella; Tran, Fabien; Widmer, Roland; Dienel, Thomas; Radican, Kevin; Ding, Yun; Hutter, Jürg; Gröning, Oliver (2014). "Site-selective adsorption of phthalocyanine on h-BN/Rh(111) nanomesh". Physical Chemistry Chemical Physics. 16 (24): 12374–12384.
    PMID 24828002
    .
  3. ^ a b Ghani, Fatemeh; Kristen, Juliane; Riegler, Hans (2012-02-09). "Solubility properties of unsubstituted metal phthalocyanines in different types of solvents". Journal of Chemical & Engineering Data. 57 (2): 439–449.
    ISSN 0021-9568
    .
  4. ^ Wagner, Hans J.; Loutfy, Rafik O.; Hsiao, Cheng-Kuo (1982-10-01). "Purification and characterization of phthalocyanines". Journal of Materials Science. 17 (10): 2781–2791.
    S2CID 96336392
    .
  5. ^ Nemykin, Victor N.; Lukyanets, Evgeny A. (2010-02-18). "Synthesis of substituted phthalocyanines". Arkivoc. 2010 (1): 136.
    hdl:2027/spo.5550190.0011.104
    .
  6. ^ Siles, P.F.; Hahn, T.; Salvan, G.; Knupfer, M.; Zhu, F.; Zahn, D.R.T.; Schmidt, O.G. (2016-04-21). "Tunable charge transfer properties in metal-phthalocyanine heterojunctions". Nanoscale. 8 (16): 8607–8617.
    PMID 27049842
    .
  7. ^ Braun, A.; Tcherniac, J. (1907). "Über die Produkte der Einwirkung von Acetanhydrid auf Phthalamid" [On the products of the reaction of acetic anhydride with phthalamide]. Berichte der Deutschen Chemischen Gesellschaft (in German). 40 (2): 2709–2714.
    doi:10.1002/cber.190704002202. Archived
    from the original on 2017-09-16. Retrieved 2015-09-15.
  8. ^ de Diesbach, Henri; von der Weid, Edmond (1927). "Quelques sels complexes des o-dinitriles avec le cuivre et la pyridine" [Certain complex salts of o-dinitriles with copper and pyridine]. Helvetica Chimica Acta (in French). 10: 886–888.
    doi:10.1002/hlca.192701001110
    .
  9. ^ "The discovery of a new pigment: The story of Monastral blue by Imperial Chemical Industries". colorantshistory.org. Archived from the original on 2009-07-25. Retrieved 2010-01-18.{{cite web}}: CS1 maint: unfit URL (link)
  10. ^ Linstead, R.P. (1934-01-01). "212. Phthalocyanines. Part I. A new type of synthetic colouring matters". Journal of the Chemical Society. (resumed): 1016.
    ISSN 0368-1769
    .
  11. ^ Sakamoto, Keiichi; Ohno-Okumura, Eiko (2009-08-28). "Syntheses and functional properties of phthalocyanines". Materials. 2 (3): 1127–1179.
    PMC 5445737
    .
  12. ^ a b c Löbbert, Gerd. "Phthalocyanines".
    ISBN 978-3527306732
    .
  13. ^ Dahlen, Miles A. (1939-07-01). "The phthalocyanines: A new class of synthetic pigments and dyes". Industrial & Engineering Chemistry. 31 (7): 839–847.
    ISSN 0019-7866
    .
  14. ^ Claessens, Christian G.; Hahn, Uwe; Torres, Tomás (2008). "Phthalocyanines: From outstanding electronic properties to emerging applications". The Chemical Record. 8 (2): 75–97.
    PMID 18366105
    .
  15. ^ Kumar, Challuri Vijay; Sfyri, Georgia; Raptis, Dimitrios; Stathatos, Elias; Lianos, Panagiotis (2014-12-10). "Perovskite solar cell with low cost Cu-phthalocyanine as hole transporting material". RSC Advances. 5 (5): 3786–3791.
    S2CID 84832945
    .
  16. ^ Yuen, Avery P.; Jovanovic, Stephen M.; Hor, Ah-Mee; Klenkler, Richard A.; Devenyi, Gabriel A.; Loutfy, Rafik O.; Preston, John S. (2012). "Photovoltaic properties of M-phthalocyanine/fullerene organic solar cells". Solar Energy. 86 (6): 1683–1688.
    S2CID 55531280
    .
  17. ^ Sorokin, Alexander B. (2013-10-09). "Phthalocyanine metal complexes in catalysis". Chemical Reviews. 113 (10): 8152–8191.
    PMID 23782107
    .
  18. ^ Miller, J.; Baron, E.; Scull, H.; Hsia, A.; Berlin, J.; Mccormick, T.; Colussi, V.; Kenney, M.; Cooper, K. (2007). "Photodynamic therapy with the phthalocyanine photosensitizer Pc 4: The case experience with preclinical mechanistic and early clinical–translational studies". Toxicology and Applied Pharmacology. 224 (3): 290–299.
    PMID 17397888
    .
  19. ^ Karan, Santanu; Basak, Dhrubajyoti; Mallik, Biswanath (2007). "Copper phthalocyanine nanoparticles and nanoflowers". Chemical Physics Letters. 434 (4–6): 265–270.
    doi:10.1016/j.cplett.2006.12.007
    .
  20. ^ van Keuren, Edward; Bone, Alysia; Ma, Changbao (2008-06-01). "Phthalocyanine nanoparticle formation in supersaturated solutions". Langmuir. 24 (12): 6079–6084.
    PMID 18479155
    .
  21. ^ Lokesh, K.S.; Shivaraj, Y.; Dayananda, B.P.; Chandra, Sudeshna (2009). "Synthesis of phthalocyanine stabilized rhodium nanoparticles and their application in biosensing of cytochrome c". Bioelectrochemistry. 75 (2): 104–109.
    PMID 19303822
    .
  22. ^ "Mitsui Gold Archival DVD-R and DVD+R". www.conservationresources.com. Archived from the original on 2018-11-26. Retrieved 2020-04-13.

External links

Wikimedia Commons has media related to Phthalocyanine.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Phthalocyanine&oldid=1193575119"