Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes
The chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole (1) were studied. Solvatochromism of 1 was observed at keto-enol equilibrium due to the ground state intramolecular proton transfer (GSIPT). It was found that solvents with a good hydrogen bond acceptor (β) abil...
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Elsevier Ltd
2020
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| ऑनलाइन पहुंच: | https://dspace.ncfu.ru/handle/20.500.12258/12100 |
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ir-20.500.12258-121002020-07-28T13:36:36Z Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes Demidov, O. P. Демидов, О. П. 2-(hydroxyphenyl)benzoxazole ESIPT Fluorescence lifetime GSIPT Metal-ligand complex Photochromism Solvatochromism The chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole (1) were studied. Solvatochromism of 1 was observed at keto-enol equilibrium due to the ground state intramolecular proton transfer (GSIPT). It was found that solvents with a good hydrogen bond acceptor (β) ability were able to stabilise the keto form of 1. The excited-state intra molecular proton transfer (ESIPT) in molecules of 1 resulted in intense fluorescence with an anomalous Stokes shift of up to 8493 cm−1 and quantum yields of 0.08–0.19. The keto-form of 1 exhibits negative T-type photochromism with a thermally reversible photoconversion to the enol form. The complexes of ligand 1 with Zn(II) and Cd(II) were synthesised. According to X-ray structural analysis, the zinc complex is the neutral complex, which is formed by two oxazole-N and two phenol O donors of ligand 1 which crystallise in a centrosymmetric group with the zinc ion located on the inversion centres. The synthesised complexes possess effective blue fluorescence and resistance to photodegradation 2020-06-23T09:59:42Z 2020-06-23T09:59:42Z 2020 Статья Vetrova, E.V., Tupaeva, I.O., Sayapin, Y.A., Gusakov, E.A., Nikolaevskii, S.A., Demidov, O.P., Minkin, V.I., Metelitsa, A.V. Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes // Dyes and Pigments. - 2020. - Volume 180. - Номер статьи 108417 http://hdl.handle.net/20.500.12258/12100 en Dyes and Pigments application/pdf application/pdf Elsevier Ltd |
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СКФУ |
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Репозиторий |
| language |
English |
| topic |
2-(hydroxyphenyl)benzoxazole ESIPT Fluorescence lifetime GSIPT Metal-ligand complex Photochromism Solvatochromism |
| spellingShingle |
2-(hydroxyphenyl)benzoxazole ESIPT Fluorescence lifetime GSIPT Metal-ligand complex Photochromism Solvatochromism Demidov, O. P. Демидов, О. П. Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes |
| description |
The chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole (1) were studied. Solvatochromism of 1 was observed at keto-enol equilibrium due to the ground state intramolecular proton transfer (GSIPT). It was found that solvents with a good hydrogen bond acceptor (β) ability were able to stabilise the keto form of 1. The excited-state intra molecular proton transfer (ESIPT) in molecules of 1 resulted in intense fluorescence with an anomalous Stokes shift of up to 8493 cm−1 and quantum yields of 0.08–0.19. The keto-form of 1 exhibits negative T-type photochromism with a thermally reversible photoconversion to the enol form. The complexes of ligand 1 with Zn(II) and Cd(II) were synthesised. According to X-ray structural analysis, the zinc complex is the neutral complex, which is formed by two oxazole-N and two phenol O donors of ligand 1 which crystallise in a centrosymmetric group with the zinc ion located on the inversion centres. The synthesised complexes possess effective blue fluorescence and resistance to photodegradation |
| format |
Статья |
| author |
Demidov, O. P. Демидов, О. П. |
| author_facet |
Demidov, O. P. Демидов, О. П. |
| author_sort |
Demidov, O. P. |
| title |
Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes |
| title_short |
Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes |
| title_full |
Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes |
| title_fullStr |
Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes |
| title_full_unstemmed |
Chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its Zn(II) and Cd(II) complexes |
| title_sort |
chromogenic properties of 2-(2-carbomethoxy-3,4-dichloro-6-hydroxyphenyl)benzoxazole and its zn(ii) and cd(ii) complexes |
| publisher |
Elsevier Ltd |
| publishDate |
2020 |
| url |
https://dspace.ncfu.ru/handle/20.500.12258/12100 |
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