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A series of star-shaped macromolecules bearing distinct symmetrical branches with alternating organoiron complexes and azobenzene moieties were synthesized using both convergent and divergent approaches. The various azo dye and organoiron-containing branches were reacted with multifunctional cores v...
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There has been tremendous interest in organoiron macromols. This interest stems from their application as chem. sensors, electrocatalysts, modified electrodes and photo-active mol. devices. Herein, we report the synthesis and characterization of a no. of different classes of organoiron macromols. co...
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A review. This chapter discusses the synthesis, structures, selected properties, and uses of polymers that have metal-metal bonds incorporated into their backbone chains. These materials are of interest for a no. of reasons. The primary reason is the promise of new and unusual properties. In particu...
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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 corr...
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A no. of sol. organometallic polymers with pendent cyclopentadienyliron and pentamethylcyclopentadienylruthenium moieties were prepd. under mild exptl. conditions. These polyarom. materials contained ether, thioether and amine bridges. These polymeric materials were characterized using NMR, GPC and ...
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A review. 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 ...
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A no. of substituted arene cyclopentadienyliron complexes were reacted with phenolphthalein in the presence of potassium carbonate using DMF as a solvent to prep. di-iron complexes as shown in the following scheme. Subsequent reaction with n-butylamine resulted in an unprecedented cleavage of the et...
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Polarographic half-wave potentials for two reduction steps of 49 cyclopentadienyliron complexes of substituted arenes or heterocycles in dimethylformamide were determined. A fast cyclic voltammetry (10–40 V/s) was used to study the electron transfer kinetics of some of these complexes. After corre...
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Arom. ether complexes of cyclopentadienyliron contg. pendent carboxylic acid groups were reacted with methacrylate and styrene functionalized mols. These diiron complexes were subsequently polymd. in the presence of AIBN to give the corresponding polymethacrylates and polystyrenes with organoiron fu...
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The organometallic polymers ([Ag(dmb)(2)]BF(4))(n) (dmb = 1,8-diisocyano-p-menthane) and ([Pt(2)(dppm)(2)(CNC(6)Me(4)NC)](BF(4))(2))(n) (dppm = (Ph(2)P)(2)CH(2), CNC(6)Me(4)NC = 1,4-diisocyano-tetramethylbenzene) were reacted with the conjugated organic polymers of the type (-Cz-C(6)H(4)-)(n) and (-...
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Nucleophilic arom. substitution of p-dichlorobenzene complexed to a cyclopentadienyliron cation with oxygen and sulfur nucleophiles led to the formation of polymers with pendent iron moieties as shown in the following scheme. These polymers were sol. in various org. solvents. Photolytic demetallatio...
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A series of cyclopentadienyl-iron-complexed azo-functionalized polymers were synthesized. The visible spectra of the azo dyes changed upon reaction with organometallic complexes; however, the absorption spectra of the monomers and polymers were similar. Photolysis of the organoiron polymers allowed ...
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A review on rigid-rod transition metal polyyne polymers. [on SciFinder(R)]
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Electrochemical reduction studies of a series of η6-polycyclic and η6-heterocyclie arene-η5-cyclopentadienyliron cations were carried out in different solvents and at different temperatures. The complexes were reduced in two one-electron steps. Stability of the first reduction product was much hi...
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A review. Metallodendrimers can be assembled in a no. of ways (covalent, ionic, hydrogen-bonding, coordination), wherein the metal plays key roles: sensor, catalyst, electronic, magnetic, or optical device. The mol. engineering pertaining to the metallodendritic design is relevant to multiple aspect...
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Polydeltacylene (I) having >95% cis-configuration was prepd. by ring-opening metathesis polymn. in presence of ReCl5. Treatment of I with dimethyldioxirane gave quant. epoxidn., and polynorbornene exhibited similar behavior.
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n6-Chloroarene or nitroarene-n5-cyclopentadienyliron hexafluorophosphates react readily with CF3CH2OH/K2CO3 or with piperidine or piperazine to give nucleophilic aromatic substitutions with Cl or NO2 as the leaving group, further demonstrating an activation for SNAr reactions by complexation to the ...
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The introduction of cyano groups into arom. sulfones is of interest in light of the potential uses of these materials as monomeric units in the synthesis of engineering thermoplastics. Organoiron complexes (I) were initially prepd. by reaction of p-dichlorobenzenecyclopentadienyliron with various di...
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Radical polymerization of organoiron (alkynyl methacrylate)s afforded a series of organoiron poly(alkynyl methacrylate)s with the ability to coordinate dicobalt hexacarbonyl. The polymers were post-modified with dicobalt hexacarbonyl moieties through reaction with dicobaltoctacarbonyl. Gel permeatio...
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We have examined the electronic structure of a series of metal arene monomers and polymers by near-edge X-ray absorption fine structure spectroscopy. We observe that electron-donating or -withdrawing substituents have a measurable effect on some features in the NEXAFS spectra of these species. Howev...
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A no. of sol. organometallic polymers with pendent cyclopentadienyliron and pentamethylcyclopentadienylruthenium moieties were prepd. under mild exptl. conditions. These polyarom. materials contained ether, thioether and amine bridges. The following figure represents one of the organometallic polyme...
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A review is presented on the use of metal coordination polymers for nanofabrication. Nanostructures of metal nanoparticles and semiconducting metal oxides made from polymers coordinated to the precursors are presented. [on SciFinder(R)]