Polyacetylene: Its synthesis, doping and structure

Saxman, A.M.; Liepins, R.; Aldissi, M.

doi:10.1016/0079-6700(85)90008-5

Cited by 73 publications

(27 citation statements)

References 87 publications

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“…However, number of methods such as photochemical polymerization [71], pyrolysis [72,73], metal-catalyzed polymerization [74][75][76], solid-state polymerization [77], plasma polymerization [78], ringforming condensation [79], step-growth polymerization [80,81], and soluble precursor polymer preparation [82,83], have been reported in literature for synthesis of conjugated polymers. Here only chemical and electrochemical polymerization are described briefly.…”

Section: Synthesis Of Conducting Ferromagnetic Polyaniline-ferrite Comentioning

confidence: 99%

Designing of Nano Composites of Conducting Polymers for EMI Shielding

Dhawan¹,

Ohlan²,

Singh³

2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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Section: Synthesis Of Conducting Ferromagnetic Polyaniline-ferrite Comentioning

confidence: 99%

Designing of Nano Composites of Conducting Polymers for EMI Shielding

Dhawan¹,

Ohlan²,

Singh³

2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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“…Generally, conjugated polymers are prepared mainly by means of polymerization, including coordination polymerization and condensation polymerization. As early as 1958, Natta and co-workers reported the synthesis of polyacetylene using Ti/Al catalysts, which was a method based on coordination polymerization (Saxman et al, 1985 ). In 2000, Shirakawa et al awarded the Nobel Prize in Chemistry for their studies in conductive polymers, particularly the doped polyacetylene, thus triggering a boom in the study of conducting polymers based on coordination polymerization (Shirakawa, 2001 ).…”

Section: Introductionmentioning

confidence: 99%

Rearrangement Strategy for the Preparation of Polymers With π-Conjugated Structures

et al. 2021

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π-Conjugated polymers are usually prepared by polymerization only. In this perspective article, typical synthesis methods of conjugated polymers are briefly summarized, and a novel strategy for preparing conjugated polymers by rearrangement is proposed. During the metalation process, many conjugated structures were generated in polybutadiene by double bond migration. The effects of reaction time, temperature, and catalyst dosage on the product structure were investigated. Moreover, the structure of the products was confirmed by FTIR, 1H NMR, and 2D HSQC NMR spectra. Thus, a possible reaction mechanism was proposed, in which polybutadiene generates allylic carbanions in the presence of n-butyllithium, and then the double bonds migrate through the carbanions rearrangement to generate many conjugated structures in the backbone chain. The method shows promise in facile and low-cost synthesis of conjugated polymers without the need for precious metal catalysts.

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“…24 However, PA itself is difficult to process because it readily reacts with ambient oxygen and reduces the polymer's conductivity. 25 This instability has prevented commercial use of PA in organic electronics. Early reports26-28 suggest that functionalizing PA with electron-withdrawing substituents (e.g.…”

Section: Introductionmentioning

confidence: 99%

Multiconfigurational Dynamics Explain Photochemical Reactivity and Torquoselectivity Towards Fluorinated Polyacetylenes

Cox¹,

Lopez

2020

Preprint

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The discovery of the conductivity of polyacetylene ignited the field of organic electronic materials. Functionalizing polyacetylenes with electron withdrawing groups (e.g., fluorine), has theoretically been shown to increase the air-stability of PAs and open new avenues in organic electronics. Burns and coworkers recently reported a novel synthetic route to fluorinated polyacetylenes which utilizes as a key step the completely stereoselective photochemical electrocyclic ring-closing of hexafluorinated dienes. This photochemical torquoselective (photo-torquoselective) reaction is, to our knowledge, the first of its kind. While the torquoselectivity model (Houk and co-workers) describes the stereospecificity of thermal electrocyclic reactions, no such reactivity model exists for their photochemical counterpart. We have used multiconfigurational quantum chemical calculations and ab initio molecular dynamics simulations to describe this reaction and to determine the origin of its stereoselectivity. We show that the reaction proceeds through the S1 excited state with a lifetime of 988 fs. This reaction lies along an energetically unfavorable pathway which results in a reaction quantum yield of approximately 0.9%. We predict that the reaction pathway to the unobserved product lies 0.2 eV (4.6 kcal mol−1) higher in energy than the pathway to the observed isomer. The unobserved isomer brings adjacent fluorine substituents to within 2.67 and 2.60 Å of each other at the S1/S0 crossing point, resulting in a closed-shell repulsion. This repulsion is responsible for increasing the energy of the unobserved pathway which directs the reaction exclusively to the observed product.

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Polyacetylene: Its synthesis, doping and structure

Cited by 73 publications

References 87 publications

Designing of Nano Composites of Conducting Polymers for EMI Shielding

Designing of Nano Composites of Conducting Polymers for EMI Shielding

Rearrangement Strategy for the Preparation of Polymers With π-Conjugated Structures

Multiconfigurational Dynamics Explain Photochemical Reactivity and Torquoselectivity Towards Fluorinated Polyacetylenes

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