Tuning of electronic properties and rigidity in PEDOT analogs

Wijsboom, Yair H.; Sheynin, Yana; Patra, Asit; Zamoshchik, Natalia; Vardimon, Ran; Leitus, Gregory; Bendikov, Michael

doi:10.1039/c0jm02679d

Cited by 58 publications

(80 citation statements)

References 31 publications

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“…70%). In comparison with other routes,15, 16, 22, 35, 51–54 this transetherification reaction can avoid complex operating procedures and strict reaction conditions. More importantly, by modifying the raw material quantity, reaction time and post‐treatment as described in the Experimental part, the total yield of EDTT can rise up to 86.40%, not only a little better than that of EDOT (80.64%, lit 52.…”

Section: Resultsmentioning

confidence: 99%

Effectiveness of alternating mammography and magnetic resonance imaging for screening women with deleterious BRCA mutations at high risk of breast cancer

Le‐Petross

Whitman

Atchley

et al. 2011

Cancer

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BACKGROUND: Magnetic resonance imaging (MRI) has been used to supplement screening mammography and clinical breast examination (CBE) in women who are at high risk of developing breast cancer. In this study, the authors investigated the efficacy of alternating screening mammography and breast MRI every 6 months in women who had a genetically high risk of developing breast cancer. METHODS: A retrospective chart review was performed on all women who were seen in a high-risk breast cancer clinic from 1997 to 2009. Patients with breast cancer gene (BRCA) mutations who underwent alternating screening mammography and breast MRI every 6 months were included in the study. Mammography, ultrasonography, MRI, and biopsy results were reviewed. RESULTS: Of 73 patients who met the study criteria, 37 had BRCA1 mutations, and 36 had BRCA2 mutations. Twenty-one patients (29%) completed 1 cycle of mammography and MRI surveillance, 23 patients (31%) completed 2 cycles, 18 patients (25%) completed 3 cycles, and patients 11 (15%) completed !4 cycles. The median follow-up was 2 years (range, 1-6 years). Thirteen cancers were detected among 11 women (15%). The mean tumor size was 14 mm (range, 1-30 mm), and 2 patients had bilateral cancers. Twelve of 13 cancers were detected on an MRI but not on the screening mammography study that was obtained 6 months earlier. One cancer (a 1-mm focus of ductal carcinoma in situ) was an incidental finding in a prophylactic mastectomy specimen. One patient had ipsilateral axillary lymphadenopathy identified on ultrasonography but had no evidence of lymph node involvement after neoadjuvant chemotherapy and surgery. CONCLUSIONS: In women who were at genetically high risk of developing breast cancer, MRI detected cancers that were not identified on mammography 6 months earlier. Future prospective studies are needed to evaluate the benefits of this screening regimen.

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Section: Resultsmentioning

confidence: 99%

Effectiveness of alternating mammography and magnetic resonance imaging for screening women with deleterious BRCA mutations at high risk of breast cancer

Le‐Petross

Whitman

Atchley

et al. 2011

Cancer

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“…Usually the side groups such as alkyl chains are incorporated in order to improve solubility of conjugated molecules in organic medium. Other substituents including several functional groups are incorporated to modified physical properties such as energy levels, absorption, emission and morphology [1,2]. Side groups often lead to improved self ordering with enhanced charge mobility [3] in other cases they worsen the electric conductivity due to steric hindrance.…”

Section: Introductionmentioning

confidence: 99%

The role of structural and electronic factors in shaping the ambipolar properties of donor–acceptor polymers of thiophene and benzothiadiazole

et al. 2015

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This version is available at https://strathprints.strath.ac.uk/55930/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.uk

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“…Vibrations at 1186, 1139, and 1080 cm −1 originate from C–O–C bond stretching in the ethylene dioxy group. C–S bond 3 in the thiophene ring are also seen at 977, 833, and 682 cm −1 . The small peaks ranging from 2800 to 3000 cm −1 are assigned to aliphatic C–H stretching mode depending on long alkyl tail of DBSA 4, which confirms the doping of PEDOT by DBSA.…”

Section: Resultsmentioning

confidence: 90%

“…In recent times π‐conjugated organic polymers have generated great interest due to their versatile applications in organic electronics 1. Among them, poly(3,4‐ethylenedioxythiophene) (PEDOT) is one of the most attractive π‐conjugated polymer because of its high electrical conductivity 2, 3, low redox potential 4, moderate band gap 5, transparency in oxidized state 6, environmental stability 7, and easy control of conductivity 8. In the monomer EDOT, thiophene ring is protected at 3 and 4 position by ethylene‐dioxy moiety, reducing the possibility of side chain reaction during polymerization, which leads to enhancement in conjugation length of the resulting polymer chain of PEDOT 9.…”

Section: Introductionmentioning

confidence: 99%

Irradiation induced crossover from 1D to 3D transport behaviors of PEDOT‐titanium dioxide hybrid nanocomposites

Sarmah¹,

Kumar²

2012

Physica Status Solidi (a)

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Conductive poly(3,4‐ethylenedioxythiophene)/TiO2 nanocomposites were synthesized via a facile oxidative polymerization approach using dodecylbenzene sulfonic acid as a dopant and ammonium peroxydisulfate as an oxidant and irradiated with 90 MeV O7+ ions at the fluences of 5 × 1010, 1 × 1011, 5 × 1011, and 1 × 1012 ions cm−2 using 15UD Pelletron accelerator under high vacuum. X‐ray diffraction studies show that microstrain and domain crystallite size of the nanocomposites increases with the increase of ion fluence resulting in highly ordered PEDOT‐TiO2 nanocomposites. Thermogravimmetric analysis shows that the thermal stability of the nanocomposites increases with the increase of irradiation fluences which can be attributed to the crosslinking of polymer chains due to high electronic energy deposition. Scanning electron micrographs show that there is grain growth after swift heavy ion (SHI) irradiation resulting highly dense and less porous microstructure of nanocomposite films. DC conductivity of unirradiated nanocomposites exhibits Mott's 1D variable range hopping (VRH) mechanism. However, there is cross over to 3D VRH mechanism at higher irradiation fluence of 5 × 1011 and 1 × 1012 ions cm−2. There is an enhancement in the electrical conductivity of the nanocomposites upon SHI irradiation correlating crosslinking with DC conductivity of the nanocomposites.

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Tuning of electronic properties and rigidity in PEDOT analogs

Cited by 58 publications

References 31 publications

Effectiveness of alternating mammography and magnetic resonance imaging for screening women with deleterious BRCA mutations at high risk of breast cancer

Effectiveness of alternating mammography and magnetic resonance imaging for screening women with deleterious BRCA mutations at high risk of breast cancer

The role of structural and electronic factors in shaping the ambipolar properties of donor–acceptor polymers of thiophene and benzothiadiazole

Irradiation induced crossover from 1D to 3D transport behaviors of PEDOT‐titanium dioxide hybrid nanocomposites

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