{"id":2487,"date":"2018-12-17T21:46:35","date_gmt":"2018-12-17T18:46:35","guid":{"rendered":"http:\/\/polymerjournal.kiev.ua\/en\/?page_id=2487"},"modified":"2019-01-22T14:07:12","modified_gmt":"2019-01-22T11:07:12","slug":"2018-4-5","status":"publish","type":"page","link":"http:\/\/polymerjournal.kiev.ua\/en\/2018-4-5\/","title":{"rendered":"2018 (4) 5"},"content":{"rendered":"

https:\/\/doi.org\/10.15407\/polymerj.40.04.254<\/a><\/p>\n

Oligomeric silsesquioxanes containing azobenzene chromophore fragments in an organic frame based on a mixture of silsesquioxanes with epoxy groups<\/strong><\/p>\n

 <\/p>\n

M.A. Gumenna<\/em><\/strong>1<\/em><\/strong>\u00a0, N.S. Klimenko<\/em><\/strong>1<\/em><\/strong>\u00a0, A.V. Stryutsky<\/em><\/strong>1<\/em><\/strong>, <\/em><\/strong>\u041e<\/em><\/strong>.<\/em><\/strong>\u041e<\/em><\/strong>. Sobko<\/em><\/strong>1<\/em><\/strong>, A.V. Shevchuk<\/em><\/strong>2<\/em><\/strong>, V.V. Kravchenko<\/em><\/strong>2<\/em><\/strong>, <\/em><\/strong>\u0410<\/em><\/strong>.V. Kravchenko<\/em><\/strong>2<\/em><\/strong>,<\/em><\/strong> V.V. Shevchenko<\/em><\/strong>1<\/em><\/strong>\u00a0<\/em><\/strong><\/p>\n

 <\/p>\n

1\u00a0Institute of Macromolecular Chemistry NAS of Ukraine<\/p>\n

48, Kharkivs\u2019ke shose, Kyiv, 02160, Ukraine<\/p>\n

2 L.M. Litvinenko Institute of Physical-organic Chemistry and Coal Chemistry NAS of Ukraine<\/p>\n

50, Kharkivs\u2019ke shose, Kyiv, 02160, Ukraine<\/p>\n

 <\/p>\n

Polym. J., 2018, 40<\/strong>, no. 4: 254-262.<\/p>\n

 <\/p>\n

Section: Synthesis polymers.<\/p>\n

 <\/p>\n

Language: Russian.<\/p>\n

 <\/p>\n

Abstract:<\/p>\n

 <\/p>\n

A method for the synthesis of chromophore-containing amphiphilic reactive oligomeric silsesquioxanes, based on the reaction between the epoxy groups of silsesquioxane and the hydroxyl groups of azo dyes 4- (phenylazo) phenol or 4- [4- (phenylazo) phenylazo] -o-cresol, was proposed. A characteristic feature of such dyes is their ability to photoisomerization – reversible transitions from a more stable trans form to a less stable cis form when exposed to light of a certain wavelength. The structure of the synthesized substances was characterized by the methods of IR and <\/em>1<\/em>H NMR spectroscopy. The optical properties of the initial mixture of oligomeric silsesquioxanes and synthesized substances were investigated by the method of UV-Vis spectroscopy using DMF as a solvent. An oligomer containing 4- (phenylazo) phenol fragments is characterized by absorption with a strong band corresponding to the <\/em>p<\/em> \u2013 <\/em>p<\/em>* transition at 354 nm and a weaker band corresponding to the n \u2013 <\/em>p<\/em>* transition at 470 nm. In the UV-Vis spectrum of an oligomer containing fragments of 4- [4- (phenylazo) phenylazo] -o-cresol, an absorption maximum at 390 nm corresponding to the <\/em>p<\/em>–<\/em>p<\/em>* transition is observed. In this case, the n-<\/em>p<\/em>* transition is observed as the shoulder of the main peak at approximately 480 nm. The obtained results indicate that the addition of the described azo dyes to the silsesquioxane core does not significantly affect the optical properties of chromophores. At the same time, the presence of reactive groups in the organic frame opens up the possibility of obtaining, on their basis, polymers capable of photoisomerization with covalent binding of the chromophores.<\/em><\/p>\n

\u00a0<\/strong><\/p>\n

Keywords:<\/strong> oligomeric silsesquioxanes, functionalization, azo dyes, light absorption, photoisomerization.<\/p>\n

References<\/strong><\/p>\n

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\n\u041f\u043e\u0441\u0442\u0443\u043f\u0438\u043b\u0430 \u0432 \u0440\u0435\u0434\u0430\u043a\u0446\u0438\u044e 23 \u043e\u043a\u0442\u044f\u0431\u0440\u044f 2018 \u0433.<\/p>\n","protected":false},"excerpt":{"rendered":"

https:\/\/doi.org\/10.15407\/polymerj.40.04.254 Oligomeric silsesquioxanes containing azobenzene chromophore fragments in an organic frame based on a mixture of silsesquioxanes with epoxy groups   M.A. Gumenna1\u00a0, N.S. Klimenko1\u00a0, A.V. Stryutsky1, \u041e.\u041e. Sobko1, A.V. Shevchuk2, V.V. Kravchenko2, \u0410.V. Kravchenko2, V.V. Shevchenko1\u00a0   1\u00a0Institute of Macromolecular Chemistry NAS of Ukraine 48, Kharkivs\u2019ke shose, Kyiv, 02160, Ukraine 2 L.M. Litvinenko Institute […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"acf":[],"_links":{"self":[{"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/2487"}],"collection":[{"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/comments?post=2487"}],"version-history":[{"count":3,"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/2487\/revisions"}],"predecessor-version":[{"id":2547,"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/pages\/2487\/revisions\/2547"}],"wp:attachment":[{"href":"http:\/\/polymerjournal.kiev.ua\/en\/wp-json\/wp\/v2\/media?parent=2487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}