Axially bridged macrocyclic metal complexes as conductive polymers

Hanack, Michael; Deger, Sonja; Lange, Armin; Zipplies, Tilman

doi:10.1016/0379-6779(86)90025-1

Cited by 15 publications

(4 citation statements)

References 21 publications

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“…Of these the most straightforward one seems to be the most difficult one too: the synthesis of L n M᎐CN complexes with one open coordination site and the ability to stack one upon the other creating the infinite [L n M᎐CN] chains. Hanack and co-workers [109][110][111][112][113] have put much effort into this approach using porphyrin or phthalocyanine metal cyanides as building blocks. Polymers like [(pc)Co᎐CN] x 34 were obtained with Cr, Mn, Fe, Co and Rh as central metals and conductivities of up to 10 Ϫ2 S cm Ϫ1 were achieved.…”

Section: One-dimensional Polymersmentioning

confidence: 99%

See 1 more Smart Citation

Cyanide-bridged oligonuclear complexes: features and attractions †

Vahrenkamp¹,

Gei²,

Richardson³

1997

J. Chem. Soc., Dalton Trans.

176

131

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The synthetic and structural chemistry as well as some physical and chemical properties of cyanide-bridged complexes containing two or more metal building blocks are discussed. Emphasis is laid on molecular shape and design and their consequences, including the effects of cyanide-isocyanide isomerism. Redox phenomena and molecular magnetism have been dealt with in relation to electronic communication across the cyanide bridges and metal-metal charge transfer. Long-range interactions between remote metal centers are discussed, and the few cases where they lead to remote chemical reactions are listed.Prussian Blue, [Fe 4 {Fe(CN) 6 } 3 ]ؒxH 2 O, which actually is the oldest known co-ordination compound, 1 has attracted the skills of many scientists seeking an understanding of its formation and composition, 2 structure, 3 colour 4 and physical properties like magnetism 5 and electrical conductivity. 6 Although it was soon obvious that the linking of two different metal ions by the cyanide ligand is the basis of all these phenomena, this did not initiate a variation of the theme. The systematic synthetic and physical exploration of Prussian Blue-like compounds had to await the popularity of the chemistry of materials. Only in recent years has a number of attractive two-and three-dimensional co-ordination polymers comprised of M᎐CN᎐MЈ units been prepared and subjected to the appropriate measurements. 7 While bulk magnetism and conductivity require extended interactions their basic fundamental property, the electronic communication between two metals across the cyanide bridge, is local and can be studied in simple dinuclear complexes. But classical co-ordination chemistry was not interested in this phenomenon, and hence the literature of more than 25 years ago contains only rare examples of cyanide-bridged systems 8 amongst the multitude of ligand-bridged dinuclear complexes. 9 It took the emerging discussion of mixed valence 10-12 and innersphere electron transfer 13,14 to move the M᎐CN᎐MЈ systems into the limelight. They were among the first to be studied in this respect, 15,16 and since then the electronic interactions between two metals across a cyanide bridge have proven to be a fertile area of research.In the last 15 years many di-and tri-nuclear complexes with bridging cyanide ligands have been investigated for the electronic communication and the electron transfer between their metal centers by means of electronic spectroscopy, electrochemistry, IR spectroscopy, fast kinetic methods and molecular orbital (MO) theory. Among others, the research groups of

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Section: One-dimensional Polymersmentioning

confidence: 99%

“…by using it as a coating for electrodes, has, to our knowledge, not been observed yet. There is no doubt that it is possible as Hanack and co-workers 109, 113 have shown that onedimensional polymers with linear (M᎐CN) x backbones can have quite high electrical conductivities.…”

Section: Unidirectional Electron Transfermentioning

confidence: 99%

Cyanide-bridged oligonuclear complexes: features and attractions †

Vahrenkamp¹,

Gei²,

Richardson³

1997

J. Chem. Soc., Dalton Trans.

176

131

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“…BF À 4 , PF À 6 , HSO À 4 , CIO À 4 ), leading to good semiconducting properties (' RT = 10 À5 -10 À1 S cm À1 ) with thermal stabilities up to 120-130°C. The results from 57 Fe Mössbauer spectroscopy prove that doping does not destroy the bridged structure of the polymer.…”

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confidence: 82%

Tribute to Professor Dr Michael Hanack

Subramanian¹

2000

J. Porphyrins Phthalocyanines

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“…In addition, some phthalocyanine complexes are capable of forming linear stacked polymers or onedimensional complexes which may lead to metallomacrocyclic conductors [8,9]. In addition, some phthalocyanine complexes are capable of forming linear stacked polymers or onedimensional complexes which may lead to metallomacrocyclic conductors [8,9].…”

mentioning

confidence: 99%

Synthesis of phthalocyanines and related compounds

Bekâroĝlu

2000

J. Porphyrins Phthalocyanines

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This paper provides a review of synthesis of the phthalocyanines containing various macrocycles at the peripheral position of the benzene rings. They are expected to be suitable to change the chemical and physical properties toward the need of technologycal applications. In addition, transition and alkali metal phthalocyanine complexes especially rare-earth bis phthalocyanines, are object of intense investigations for their unique optical and electrochemical properties. The methodology of synthesis, purification and yield varies the structural designation which is restricted and depends on the starting compounds.

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Axially bridged macrocyclic metal complexes as conductive polymers

Cited by 15 publications

References 21 publications

Cyanide-bridged oligonuclear complexes: features and attractions †

Cyanide-bridged oligonuclear complexes: features and attractions †

Tribute to Professor Dr Michael Hanack

Synthesis of phthalocyanines and related compounds

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