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Information × Registration Number 0221U100347, 0119U002034 , R & D reports Title Synthesis of macroheterocycles with fragments of bis (benzimidazolyl-2-yl) -benzenes on the basis of phthalic, isophthalic and terephthalic acids. Complex-forming and spectral-luminescent properties. popup.stage_title Head Yavolovskyi Arkadii O., Registration Date 04-01-2021 Organization Physico-Chemical Institute O. Bogatsky National Academy of Sciences of Ukraine popup.description2 Preparative methods of synthesis were developed and prototypes of 1,2-, 1,3-, and 1,4-bis- (benzimidazolyl-2-yl) -benzenes based on phthalic, isophthalic and terephthalic acids were obtained. The photoluminescence spectra of solid samples are characterized by a wide band in the region of 380-500 nm. The highest fluorescence intensity ismanifested by the 1,3-derivative, the lowest by the 1,4-isomer. The half-width values are 88.8, 65.6 and 67.7 nm, for 1,2-, 1,3-, 1,4-derivatives, respectively. A method for the synthesis of macroheterocycles containing fragments of bis- (benzimidazolyl-2-yl) -benzenes has been developed. The synthesis of 12-, 15-membered macroheterocycles was carried out by alkylationof 1,3-bis- (benzimidazolyl-2-yl) -benzene with ditosylates of di- and triethyleneglycol, respectively. It was found that undersimilar conditions, the interactionof 1,2-bis- (benzimidazolyl-2-yl) -benzene with triethyleneglycolditosylate forms a 28-membered macroheterocycle with two heterocyclic moieties. The photoluminescence spectra of solid samples of 12-, 15-membered macroheterocycles are characterized by a wide band in the regionof 340-400 nm with a long-wave length arm, increasing the size of the macrocyclic cavity lead sto a short-wave lengthshift, both maximum (9 nm) and shoulder position ) of this band. The fluorescence of the 28-membered macroheterocycleis shifted to a longer wave length region and is expressed by a wide band with a maximumat 383 nm. The fluorescence intensity of a 28-membered macroheterocycleis almost 2 time shigherthanthe intensity of a 12-membered one. Research methods and equipment: spectrophotometry (Specord UV / VIS, Perkin-Elmer Lambda 9 UV / VIS / NIR), PMR spectroscopy (Varian WXP-300), massspectrometry (MX 1321), fluorescence spectroscopy (FL-3-22- TCSPC (Horiba JobinYvon) and SDL-2 (LOMO).   Product Description popup.authors Ivanov Yuri E. Gryshchuk Lydiya V. Stepanov Dmytro Ye Yavolovskyi Arkadii O. popup.nrat_date 2021-01-04 Close