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Growing Science » Current Chemistry Letters » Synthesis of Ruthenium(III) Phthalocyanine with Di-axial Bromo Ligands - A Promising Molecular Conductor with Giant Negative Magnetoresistance

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Current Chemistry Letters
ISSN 1927-730x (Online) - ISSN 1927-7296 (Print)
Quarterly Publication
Volume 4 Issue 1 pp. 1-6, 2015

Synthesis of Ruthenium(III) Phthalocyanine with Di-axial Bromo Ligands - A Promising Molecular Conductor with Giant Negative Magnetoresistance Pages 1-6 PDF Download PDF

Authors: Mario A.V. Gamboa, Joey A.A. Valinton, Derrick E.C. Yu

📋 Author Affiliations:
Mario A.V. Gamboa, Joey A.A. Valinton, Derrick E.C. Yu ORCID
¹ Department of Chemistry, College of Science, De La Salle University, 2401 Taft Avenue, Manila, Philippines
doi 10.5267/j.ccl.2014.12.003
Crossref Source: CrossRef

🔑 Keywords: Axially-ligated ruthenium, Giant negative magnetoresistance, Molecular conductor, Molecular engineering, phthalocyanine

Abstract: The electron transport of Phthalocyanines (Pc) with central metal and di-axial ligands (such as FeIII(Pc)L2; where L = CN, Cl, Br) originates from its intermolecular Pc π-π orbital overlap while its giant negative magnetoresistance (GNMR) arises from its intramolecular Pc-π(HOMO) and Fe-d (s=1/2) interaction. However, the π-d interaction tends to localize itinerant electrons resulting in the decrease in the conductivity of the FeIII(Pc)L2 series compared to the non-magnetic CoIII(Pc)L2 where π-d interaction is absent. More so, the axial ligand field energy of the FeIII(Pc)L2 system is found to have the ability to proportionally modulate the π-d interaction. In reference thereof, theoretical calculations point that isostructural RuIII(Pc)Br2 would provide the best balance of π-d orbital energy interplay. That is, RuIII(Pc)Br2 is expected to be a molecule with high electrical conductivity and GNMR which would make it an ideal magnetic molecular conductor. This paper reports on the synthesis of RuIII(Pc)Br2.

How to cite this paper
APA: Gamboa, M., Valinton, J & Yu, D. (2015). Synthesis of Ruthenium(III) Phthalocyanine with Di-axial Bromo Ligands - A Promising Molecular Conductor with Giant Negative Magnetoresistance. Current Chemistry Letters, 4(1), 1-6.
Chicago/Turabian: Gamboa, M., Valinton, J & Yu, D. 2015. "Synthesis of Ruthenium(III) Phthalocyanine with Di-axial Bromo Ligands - A Promising Molecular Conductor with Giant Negative Magnetoresistance." Current Chemistry Letters 4, no. 1 (2015): 1-6.
AMA: Gamboa, M., Valinton, J & Yu, D. Synthesis of Ruthenium(III) Phthalocyanine with Di-axial Bromo Ligands - A Promising Molecular Conductor with Giant Negative Magnetoresistance. Current Chemistry Letters. 2015;4(1):1-6.

References
1 Inabe T., and Tajima H. (2004) Phthalocyanines – versatile components of molecular conductors. Chem. Rev., 104, 5503–5534.

2 Yu D.E.C., Imai H., Ushio M., Takeda S., Naito T., and Inabe T. (2006) One-step synthesis of partially oxidized cobalt(III) phthalocyanine salts with axial ligands. Chem. Lett., 35, 602–603.

3 Yu D. E. C., Matsuda M, Tajima H., Kikuchi A., Taketsugu T., Naito T., and Inabe T. (2009) Variable magnetotransport properties in the TPP[Fe(Pc)L2]2 system (TPP = tetraphenylphosphonium, Pc = phthalocyaninato, L = CN, Cl, and Br). J. Mater. Chem., 19, 718–723.

4 Hotta C., Ogata M., and Fukuyama H. (2005) Interaction of the Ground State of Quarter-Filled One Dimensional Strongly Correlated Electronic System with Localized Spins. Phys. Rev. Lett. 95, 216402/1.

5 Yu D. E. C., Matsuda M, Tajima H., Naito T., and Inabe T. (2011) Stable ??? dependent electron conduction band of TPP[M(Pc)L2]2 molecular conductors (TPP = tetraphenylphosphonium; M = Co, Fe; Pc = phthalocyaninato; L = CN, Cl, Br). Dalton Trans., 40, 2283–2288, 2011.

6 Yu D.E.C., Kikuchi A., Taketsugu A., and Inabe T. (2013) Crystal Structure of Ruthenium Phthalocyanine with Diaxial Monoatomic Ligand: Bis(Triphenylphosphine)Iminium Dichloro(Phthalocyaninato(2)) Ruthenium(III). Journal of Chemistry, 2013, 486318.

7 Subramanian L.R. (2000) Tribute to Professor Dr Michael Hanack. J. Porphyrins Phthalocyanines, 4, 300–309.

8 Rawling T., and McDonagh A. (2007) Ruthenium phthalocyanine and naphthalocyanine complexes: synthesis, properties and applications. Coord. Chem. Rev., 251, 1128–1157.

9 Davies J.A., Hockensmith C.M., Kukushkin V.Yu, and Kukushkin Yu N. (1996) Non-traditional Oxidants in Preparative Coordination Chemistry. In Synthetic Coordination Chemistry: Principles and Practice. World Scientific, Singapore, 222-291.

10 Farrell N.P., Murray A.J., Thornback J.R., and Dolphin D.H., and James B.R. (1978) Phthalocyanine complexes of ruthenium(II). Inorg. Chim. Acta, 28, L144–L146.
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📚 Journal: Current Chemistry Letters | 📅 Year: 2015 | 📖 Volume: 4 | 📄 Issue: 1 | 👁️ Views: 2475 | 📊 Crossref:

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