Syntheses of Nitronyl Nitroxide and Nitroxide Polyradicals and Their Magnetic Characterization
The present paper describes the syntheses of polyradicals with pendant nitronyl nitroxide (1) or nitroxide radicals (2) and their magnetic characterization. Polyradical 1 was obtained by the polycondensation of nitronyl nitroxide substituted 3,5-diethynylbenzene with 1,3-diiodobenzenes in Et 3 N-pyr...
Gespeichert in:
| Veröffentlicht in: | Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals Molecular crystals and liquid crystals, 1993-08, Vol.232 (1), p.135-142 |
|---|---|
| Hauptverfasser: | , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 142 |
|---|---|
| container_issue | 1 |
| container_start_page | 135 |
| container_title | Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals |
| container_volume | 232 |
| creator | Miura, Yozo Ushitani, Yukio Matsumoto, Masaki Inui, Kunihiko Teki, Yoshio Takui, Takeji Itoh, Koichi |
| description | The present paper describes the syntheses of polyradicals with pendant nitronyl nitroxide (1) or nitroxide radicals (2) and their magnetic characterization. Polyradical 1 was obtained by the polycondensation of nitronyl nitroxide substituted 3,5-diethynylbenzene with 1,3-diiodobenzenes in Et
3
N-pyridine in the presence of (PPh3)
2
PdCl
2
- Cul. The spin concentrations were 1.12 × 10
21
- 1.33 × 10
21
spin/g and the number average molecular weights (M
n
) were 4300 - 4800. Polyradical 2 was obtained by the polymerization of N/-tert-butyl-3-ethynyl-5-terf-phenyl nitroxide using a Rh catalyst. The spin concentration of 2 was 2.09 × 10
21
spin/g and M
n
was 11000. Solution ESR spectra of 1 and 2 were a broad single line, and no hyperfine splittings due to nitrogen and proton nuclei were observed. This is due to the spin-exchange interaction. The SQUID measurements of 1 performed in the temperature range of 300 - 1.8 K showed that polyradical 1 is paramagnetic and there is no significant interaction among the spins. The magnetic characterization of 2 is in progress. |
| doi_str_mv | 10.1080/10587259308035707 |
| format | Article |
| fullrecord | <record><control><sourceid>crossref_infor</sourceid><recordid>TN_cdi_crossref_primary_10_1080_10587259308035707</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>10_1080_10587259308035707</sourcerecordid><originalsourceid>FETCH-LOGICAL-c298t-9638d67cfb1b925ae14aba02b7bd4c62dde065ccd4031b6fc9e1d076c6ada83a3</originalsourceid><addsrcrecordid>eNp1kEtLxTAQhbNQ8Hr1B7jrH6gmTZu24EaKL7g-wCu4skzzsJHeRCYBrb_eXutCEFcz58x8Z3EIOWL0mNGKnjBaVGVW1HwSvChpuUMWWy-dzKc9sh_CK6UZK_J8QZ4fRhd7HXRIvElubUTvxmFePqzSCTj1S937YURQVsIQvk_rXltMbuDF6Whl0vSAIKNG-wnRendAds30qg9_5pI8Xpyvm6t0dXd53ZytUpnVVUxrwSslSmk61tVZAZrl0AHNurJTuRSZUpqKQkqVU846YWStmaKlkAIUVBz4krA5V6IPAbVp39BuAMeW0XZbSvunlIk5nRnrjMcNvHscVBthHDwaBCdtaPn_-BcQ4Wwi</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Syntheses of Nitronyl Nitroxide and Nitroxide Polyradicals and Their Magnetic Characterization</title><source>Access via Taylor & Francis</source><creator>Miura, Yozo ; Ushitani, Yukio ; Matsumoto, Masaki ; Inui, Kunihiko ; Teki, Yoshio ; Takui, Takeji ; Itoh, Koichi</creator><creatorcontrib>Miura, Yozo ; Ushitani, Yukio ; Matsumoto, Masaki ; Inui, Kunihiko ; Teki, Yoshio ; Takui, Takeji ; Itoh, Koichi</creatorcontrib><description>The present paper describes the syntheses of polyradicals with pendant nitronyl nitroxide (1) or nitroxide radicals (2) and their magnetic characterization. Polyradical 1 was obtained by the polycondensation of nitronyl nitroxide substituted 3,5-diethynylbenzene with 1,3-diiodobenzenes in Et
3
N-pyridine in the presence of (PPh3)
2
PdCl
2
- Cul. The spin concentrations were 1.12 × 10
21
- 1.33 × 10
21
spin/g and the number average molecular weights (M
n
) were 4300 - 4800. Polyradical 2 was obtained by the polymerization of N/-tert-butyl-3-ethynyl-5-terf-phenyl nitroxide using a Rh catalyst. The spin concentration of 2 was 2.09 × 10
21
spin/g and M
n
was 11000. Solution ESR spectra of 1 and 2 were a broad single line, and no hyperfine splittings due to nitrogen and proton nuclei were observed. This is due to the spin-exchange interaction. The SQUID measurements of 1 performed in the temperature range of 300 - 1.8 K showed that polyradical 1 is paramagnetic and there is no significant interaction among the spins. The magnetic characterization of 2 is in progress.</description><identifier>ISSN: 1058-725X</identifier><identifier>DOI: 10.1080/10587259308035707</identifier><language>eng</language><publisher>Taylor & Francis Group</publisher><ispartof>Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 1993-08, Vol.232 (1), p.135-142</ispartof><rights>Copyright Taylor & Francis Group, LLC 1993</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c298t-9638d67cfb1b925ae14aba02b7bd4c62dde065ccd4031b6fc9e1d076c6ada83a3</citedby><cites>FETCH-LOGICAL-c298t-9638d67cfb1b925ae14aba02b7bd4c62dde065ccd4031b6fc9e1d076c6ada83a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.tandfonline.com/doi/pdf/10.1080/10587259308035707$$EPDF$$P50$$Ginformaworld$$H</linktopdf><linktohtml>$$Uhttps://www.tandfonline.com/doi/full/10.1080/10587259308035707$$EHTML$$P50$$Ginformaworld$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,59647,60436</link.rule.ids></links><search><creatorcontrib>Miura, Yozo</creatorcontrib><creatorcontrib>Ushitani, Yukio</creatorcontrib><creatorcontrib>Matsumoto, Masaki</creatorcontrib><creatorcontrib>Inui, Kunihiko</creatorcontrib><creatorcontrib>Teki, Yoshio</creatorcontrib><creatorcontrib>Takui, Takeji</creatorcontrib><creatorcontrib>Itoh, Koichi</creatorcontrib><title>Syntheses of Nitronyl Nitroxide and Nitroxide Polyradicals and Their Magnetic Characterization</title><title>Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals</title><description>The present paper describes the syntheses of polyradicals with pendant nitronyl nitroxide (1) or nitroxide radicals (2) and their magnetic characterization. Polyradical 1 was obtained by the polycondensation of nitronyl nitroxide substituted 3,5-diethynylbenzene with 1,3-diiodobenzenes in Et
3
N-pyridine in the presence of (PPh3)
2
PdCl
2
- Cul. The spin concentrations were 1.12 × 10
21
- 1.33 × 10
21
spin/g and the number average molecular weights (M
n
) were 4300 - 4800. Polyradical 2 was obtained by the polymerization of N/-tert-butyl-3-ethynyl-5-terf-phenyl nitroxide using a Rh catalyst. The spin concentration of 2 was 2.09 × 10
21
spin/g and M
n
was 11000. Solution ESR spectra of 1 and 2 were a broad single line, and no hyperfine splittings due to nitrogen and proton nuclei were observed. This is due to the spin-exchange interaction. The SQUID measurements of 1 performed in the temperature range of 300 - 1.8 K showed that polyradical 1 is paramagnetic and there is no significant interaction among the spins. The magnetic characterization of 2 is in progress.</description><issn>1058-725X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNp1kEtLxTAQhbNQ8Hr1B7jrH6gmTZu24EaKL7g-wCu4skzzsJHeRCYBrb_eXutCEFcz58x8Z3EIOWL0mNGKnjBaVGVW1HwSvChpuUMWWy-dzKc9sh_CK6UZK_J8QZ4fRhd7HXRIvElubUTvxmFePqzSCTj1S937YURQVsIQvk_rXltMbuDF6Whl0vSAIKNG-wnRendAds30qg9_5pI8Xpyvm6t0dXd53ZytUpnVVUxrwSslSmk61tVZAZrl0AHNurJTuRSZUpqKQkqVU846YWStmaKlkAIUVBz4krA5V6IPAbVp39BuAMeW0XZbSvunlIk5nRnrjMcNvHscVBthHDwaBCdtaPn_-BcQ4Wwi</recordid><startdate>19930801</startdate><enddate>19930801</enddate><creator>Miura, Yozo</creator><creator>Ushitani, Yukio</creator><creator>Matsumoto, Masaki</creator><creator>Inui, Kunihiko</creator><creator>Teki, Yoshio</creator><creator>Takui, Takeji</creator><creator>Itoh, Koichi</creator><general>Taylor & Francis Group</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19930801</creationdate><title>Syntheses of Nitronyl Nitroxide and Nitroxide Polyradicals and Their Magnetic Characterization</title><author>Miura, Yozo ; Ushitani, Yukio ; Matsumoto, Masaki ; Inui, Kunihiko ; Teki, Yoshio ; Takui, Takeji ; Itoh, Koichi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c298t-9638d67cfb1b925ae14aba02b7bd4c62dde065ccd4031b6fc9e1d076c6ada83a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Miura, Yozo</creatorcontrib><creatorcontrib>Ushitani, Yukio</creatorcontrib><creatorcontrib>Matsumoto, Masaki</creatorcontrib><creatorcontrib>Inui, Kunihiko</creatorcontrib><creatorcontrib>Teki, Yoshio</creatorcontrib><creatorcontrib>Takui, Takeji</creatorcontrib><creatorcontrib>Itoh, Koichi</creatorcontrib><collection>CrossRef</collection><jtitle>Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Miura, Yozo</au><au>Ushitani, Yukio</au><au>Matsumoto, Masaki</au><au>Inui, Kunihiko</au><au>Teki, Yoshio</au><au>Takui, Takeji</au><au>Itoh, Koichi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Syntheses of Nitronyl Nitroxide and Nitroxide Polyradicals and Their Magnetic Characterization</atitle><jtitle>Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals</jtitle><date>1993-08-01</date><risdate>1993</risdate><volume>232</volume><issue>1</issue><spage>135</spage><epage>142</epage><pages>135-142</pages><issn>1058-725X</issn><abstract>The present paper describes the syntheses of polyradicals with pendant nitronyl nitroxide (1) or nitroxide radicals (2) and their magnetic characterization. Polyradical 1 was obtained by the polycondensation of nitronyl nitroxide substituted 3,5-diethynylbenzene with 1,3-diiodobenzenes in Et
3
N-pyridine in the presence of (PPh3)
2
PdCl
2
- Cul. The spin concentrations were 1.12 × 10
21
- 1.33 × 10
21
spin/g and the number average molecular weights (M
n
) were 4300 - 4800. Polyradical 2 was obtained by the polymerization of N/-tert-butyl-3-ethynyl-5-terf-phenyl nitroxide using a Rh catalyst. The spin concentration of 2 was 2.09 × 10
21
spin/g and M
n
was 11000. Solution ESR spectra of 1 and 2 were a broad single line, and no hyperfine splittings due to nitrogen and proton nuclei were observed. This is due to the spin-exchange interaction. The SQUID measurements of 1 performed in the temperature range of 300 - 1.8 K showed that polyradical 1 is paramagnetic and there is no significant interaction among the spins. The magnetic characterization of 2 is in progress.</abstract><pub>Taylor & Francis Group</pub><doi>10.1080/10587259308035707</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1058-725X |
| ispartof | Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 1993-08, Vol.232 (1), p.135-142 |
| issn | 1058-725X |
| language | eng |
| recordid | cdi_crossref_primary_10_1080_10587259308035707 |
| source | Access via Taylor & Francis |
| title | Syntheses of Nitronyl Nitroxide and Nitroxide Polyradicals and Their Magnetic Characterization |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T03%3A46%3A24IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-crossref_infor&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Syntheses%20of%20Nitronyl%20Nitroxide%20and%20Nitroxide%20Polyradicals%20and%20Their%20Magnetic%20Characterization&rft.jtitle=Molecular%20crystals%20and%20liquid%20crystals%20science%20and%20technology.%20Section%20A,%20Molecular%20crystals%20and%20liquid%20crystals&rft.au=Miura,%20Yozo&rft.date=1993-08-01&rft.volume=232&rft.issue=1&rft.spage=135&rft.epage=142&rft.pages=135-142&rft.issn=1058-725X&rft_id=info:doi/10.1080/10587259308035707&rft_dat=%3Ccrossref_infor%3E10_1080_10587259308035707%3C/crossref_infor%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |