Search academic texts

Information × Registration Number 0213U001568, 0111U002395 , R & D reports Title Fluorenonocrownophanes, fluorenocrownophanes and molecular clips on the basis of diphenylglycoluril as new molecular receptors of inorganic and organic substrates popup.stage_title Head Kirichenko T.I., Registration Date 14-03-2013 Organization A.V.Bogatsky Physico-Chemical Institute of the National Academy of Sciences of Ukraine popup.description2 Research object - [2] catenanes containing, along with a fragment of 2,7-dioxyfluorenone fragments of 1,5-dioxynaphthalene, 4,4 '-dioxystilbene and 4,4'-dioxyazobenzene connected by the residues of pentaethylene glycol. A purpose of work is synthesis of new [2]catenanes on the base cyclobis(paraquat-p-phenylene) and a crownophanes containing fragments of naphthalene, stilbene, azobenzene and fluorenone, linked chains of pentaethylene glycol , the study of their structure and properties. Research methods - synthetic, IR, UV, NMR spectroscopy, mass spectrometry, X-ray. Some new catenanes incorporating cyclobis(paraquat-p-phenylene) (CBPQT) and fluorenonocrownophanes containing fragments of 1,5-dioxynaphthalene, 4,4 '-dioxystilbene and 4,4'-dioxyazobenzene linked by residues of pentaethylene glycol were obtained. It is shown that the template properties of the crownophane with the naphthalene fragment is much higher than other crownophanes. It is concluded that a fragment of 2,7-dioxyfluorenone both in solution and in the crystalline state, located outside the cavity of CBPQT. It is found that in solution of catenanes at room temperature observed dynamic processes: oscillation, rotation and displacement CBPQT relatively crownophane and also oscillation and rotation of aromatic fragments of crownophanes fast in the NMR time scale for catenanes with fragments of stilbene and azobenzene and significantly slowly for catenane with a fragment of naphthalene Product Description popup.authors Богащенко Т.Ю. Кікоть Л.С. Кириченко Т.І Кулигіна К.Ю. Лобач О.В. Ляпунов О.Ю Яковенко І.С. popup.nrat_date 2020-04-02 Close