First ring‐opening metathesis polymerization of norbornenes containing cationic iron moieties

Abd‐El‐Aziz, Alaa S.; May, Leslie J.; Hurd, J. A.; Okasha, Rawda M.

doi:10.1002/pola.1249

Cited by 45 publications

(32 citation statements)

References 18 publications

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“…Chloroarene complexes 1a and 1b were synthesized according to an established procedure. [7] Compound 2 [8] and complex 8 [9] were prepared using our previously reported procedures.…”

Section: Experimental Partmentioning

confidence: 99%

Soluble Polymethacrylates and Polystyrenes Containing Cationic Cyclopentadienyliron Moieties

Abd‐El‐Aziz

Todd

2004

Macro Chemistry & Physics

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Summary: Cyclopentadienyliron coordinated chloroarenes were utilized to synthesize novel classes of cationic organoiron methacrylate and styrene monomers via metal‐mediated nucleophilic aromatic substitution reactions. These monomers were subsequently polymerized using a radical initiator to produce the corresponding organoiron polymers. Polymerization of olefin‐containing monomers containing terminal chloroarene complexes was also achieved by reaction with dinucleophiles yielding organoiron‐coordinated polyaromatic ethers and ether‐thioethers with pendent methacrylate or styrene moieties. These soluble polymers were subsequently crosslinked with a radical initiator, which resulted in the isolation of insoluble networks. Cyclic voltammetric investigations of these polymers showed that the pendent cationic iron centers underwent reversible reduction. Thermogravimetric analysis showed that the cyclopentadienyliron complexes were cleaved from the polymer backbones at approximately 220 °C, however; depending on the architecture of the polymer backbones, their structural integrities held from 320 to 470 °C. The solubilities of the polymethacrylates were much higher in comparison to polystyrene analogues and had weight average molecular weights between 22 500 and 86 400 with polydispersities ranging from 1.4 to 2.6. The molecular weights of the cationic organoiron polymers prepared via nucleophilic aromatic substitution polymerization ranged from 10 500 to 22 800 with polydispersities of 1.2 to 1.7. magnified image

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“…Chloroarene complexes 1a and 1b were synthesized according to an established procedure. [7] Compound 2 [8] and complex 8 [9] were prepared using our previously reported procedures.…”

Section: Experimental Partmentioning

confidence: 99%

Soluble Polymethacrylates and Polystyrenes Containing Cationic Cyclopentadienyliron Moieties

Abd‐El‐Aziz

Todd

2004

Macro Chemistry & Physics

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“…[33][34][35][36] While some of these organometallic monomers were polymerized via ROMP of the norbornene units, others were demetallated prior to polymerization.…”

Section: Ring-opening Metathesis Polymerization (Romp) Of Substitutedmentioning

confidence: 99%

“…[35,36] A study investigating the spacers between the aryl units and the polymer backbones as well as the nature of the R group has been reported. [35] It was noted that larger aromatic ether groups increased the thermal stability of these polymers. For example, the onset of weight loss for polymer 12a was at 368 8C, whereas polymer 12e was Scheme 1.…”

Section: Ring-opening Metathesis Polymerization (Romp) Of Substitutedmentioning

confidence: 99%

Organometallic Polymers of the Transition Metals

Abd‐El‐Aziz

2002

Macromol. Rapid Commun.

164

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This article provides a comprehensive review of the synthesis, properties and applications of organometallic polymers of the transition metals. The different classes of organometallic polymers are described according to their structural make‐up, as well as by their methods of synthesis. A number of examples of each class are given to emphasize the richness and diversity in these areas of research. In addition to linear polymers, hyperbranched, crosslinked, star and dendritic polymers are also described. The properties that transition metal‐containing organometallic polymers possess, as well as the applications that these materials have found in various domains are highlighted. magnified image

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“…Block copolymers, which have been used widely in applications ranging from drug delivery to electro-optics, form our basis for the architectural control. [11] We achieve such architectural control by the use of ring-opening metathesis polymerization (ROMP) [10,[12][13][14][15][16][17][18][19] to produce block copolymers. ROMP with the ruthenium-alkylidene initiator 1 not only provides the basis of our architectural control, but 1 is also highly functional group tolerant.…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembly with Block Copolymers through Metal Coordination of SCS–Pd^II Pincer Complexes and Pseudorotaxane Formation

South

Higley

Leung

et al. 2006

Chemistry A European J

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Poly(norbornene)-based block copolymers containing side chains of palladated pincer complexes/dibenzo[24]crown-8 or palladated pincer complexes/dibenzylammonium salts were synthesized. Noncovalent functionalization was accomplished with their corresponding recognition units through simple 1:1 addition with association constants (Ka) greater than 10(5) m(-1). The self-assembly processes were monitored by using both 1H NMR spectroscopy and isothermal titration calorimetry. In all cases, we found that the self-assembly of the recognition units along each polymer block does not preclude the self-assembly processes along the other block.

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First ring‐opening metathesis polymerization of norbornenes containing cationic iron moieties

Cited by 45 publications

References 18 publications

Soluble Polymethacrylates and Polystyrenes Containing Cationic Cyclopentadienyliron Moieties

Soluble Polymethacrylates and Polystyrenes Containing Cationic Cyclopentadienyliron Moieties

Organometallic Polymers of the Transition Metals

Self‐Assembly with Block Copolymers through Metal Coordination of SCS–Pd^II Pincer Complexes and Pseudorotaxane Formation

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First ring‐opening metathesis polymerization of norbornenes containing cationic iron moieties

Cited by 45 publications

References 18 publications

Soluble Polymethacrylates and Polystyrenes Containing Cationic Cyclopentadienyliron Moieties

Soluble Polymethacrylates and Polystyrenes Containing Cationic Cyclopentadienyliron Moieties

Organometallic Polymers of the Transition Metals

Self‐Assembly with Block Copolymers through Metal Coordination of SCS–PdII Pincer Complexes and Pseudorotaxane Formation

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Resources

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Self‐Assembly with Block Copolymers through Metal Coordination of SCS–Pd^II Pincer Complexes and Pseudorotaxane Formation