Zobrazeno 1 - 10
of 73
pro vyhledávání: '"O. Morawski"'
Publikováno v:
The Journal of Organic Chemistry
The tandem process of phenol addition to a cyclic α,β-unsaturated ester followed by intramolecular transesterification and [1,5] sigmatropic rearrangement affords a series of helical coumarins based upon a previously unknown 3-amino-7-hydroxybenzo[
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1677b0eca82ae60d97b0261766d92955
https://doi.org/10.1021/acs.joc.0c02978
https://doi.org/10.1021/acs.joc.0c02978
Publikováno v:
Physical Chemistry Chemical Physics. 22:15437-15447
Photophysics of hexaazatrinaphthylene (HATN) in solution and in the solid state is determined by the nπ* character of its lowest excited singlet state and by the ππ* character of the first triplet state. The relaxation of an electronically excited
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d4c087a4f970ccc7e08fdd3560e8b46
https://doi.org/10.1039/d0cp01289k
https://doi.org/10.1039/d0cp01289k
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Physical Chemistry Chemical Physics. 21:8314-8325
A structurally unique cyclic tris-coumarin possessing three identical coumarin units bridged by amide linkers as well as two linear analogs has been synthesized. There is a remarkable agreement between crystallographic data, 1H NMR and results of cal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d293a1b674b1b5dd3237d2a1301d016e
https://doi.org/10.1039/c9cp00978g
https://doi.org/10.1039/c9cp00978g
Publikováno v:
Chemistry (Weinheim an der Bergstrasse, Germany). 26(32)
Linking a polarized coumarin unit with an aromatic substituent via an amide bridge results in weak electronic coupling that affects the intramolecular electron-transfer (ET) process. As a result of this, interesting solvent-dependent photophysical pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f1b8f3ad75bb14d426e975707137bc1
https://pubmed.ncbi.nlm.nih.gov/32212353
https://pubmed.ncbi.nlm.nih.gov/32212353
Publikováno v:
Physical Chemistry Chemical Physics. 20:14491-14503
The fluorescence intensity of bis-coumarins linked via CONH and COO functionalities are shown to exhibit a strong dependance on solvent polarity. The presence of the intramolecular hydrogen bond between the C[double bond, length as m-dash]O oxygen at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dd14af3bbcd7b70e776a36127d0c104
https://doi.org/10.1039/c8cp01084f
https://doi.org/10.1039/c8cp01084f
Autor:
Bolesław Kozankiewicz, O. Morawski, Andrzej L. Sobolewski, Pawel Gawrys, Marzena Banasiewicz, Joanna Olas, Sergiu Shova, Kinga Suwińska, Cristina A. Barboza
Publikováno v:
Journal of Molecular Liquids. 343:117532
Four donor–acceptor salicylaldimines with benzoheterocyclic substituents at nitrogen imine were prepared and characterised by means of optical spectroscopy. Their luminescent properties were compared with two isoelectronic carbocyclic analogues. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d059260600ce7e1e0bab9380cc1ba6f1
https://doi.org/10.1016/j.molliq.2021.117532
https://doi.org/10.1016/j.molliq.2021.117532
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Chemistry - A European Journal. 23:9174-9184
The synthesis of a weakly coupled, strongly polarized coumarin dimer has been achieved for the first time. The three-step strategy comprises the Skattebøl formylation followed by the Knoevenagel reaction and the formation of a tertiary amide by usin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca696e9e024d92aacbbc3e124421ca0b
https://doi.org/10.1002/chem.201701387
https://doi.org/10.1002/chem.201701387
Publikováno v:
Chemistry (Weinheim an der Bergstrasse, Germany). 25(67)
Coumarins are classic, strongly polarized fluorophores with multiple applications, and significant efforts have been put into modifying their emission characteristics and elucidating their photophysics. Expecting that π-expansion of these donor-acce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e43a63e89888abcc979f374176ea9e5
https://pubmed.ncbi.nlm.nih.gov/31523856
https://pubmed.ncbi.nlm.nih.gov/31523856