On August 31, 2021, Choroba, Katarzyna; Kotowicz, Sonia; Maron, Anna; Switlicka, Anna; Szlapa-Kula, Agata; Siwy, Mariola; Grzelak, Justyna; Sulowska, Karolina; Mackowski, Sebastian; Schab-Balcerzak, Ewa; Machura, Barbara published an article.Product Details of 24295-03-2 The title of the article was Ground- and excited-state properties of Re(I) carbonyl complexes – Effect of triimine ligand core and appended heteroaromatic groups. And the article contained the following:
In this work, a series of six rhenium(I) complexes bearing 2,2′:6′,2”-terpyridine (terpy), 2,6-di(thiazol-2-yl)pyridine (dtpy), and 2,6-di(pyrazin-2-yl)pyridine (dppy) with appended quinolin-2-yl and N-ethylcarbazol-3-yl groups were prepared and spectroscopically investigated to evaluate the photophys. consequences of both the trisheterocyclic core (terpy, dtpy and dppy) and the heterocyclic substituent. The [ReCl(CO)3(Ln-κ2N)] complexes are regarded as ideal candidates for getting structure-property relationships, while terpy-like framework represents an excellent structural backbone for structural modifications. The replacement of the peripheral pyridine rings of 2,2′:6′,2”-terpyridine by thiazoles and pyrazines resulted in a significant red-shift of the absorption and emission of [ReCl(CO)3(Ln-κ2N)] due to stabilization of the ligand-centered LUMO orbital. Both quinoline and N-ethylcarbazole are extended π-conjugation organic chromophores, but they differ in electron-donating abilities. The low-energy absorption band of Re(I) complexes with the triimine ligands bearing quinolin-2-yl group was contributed by the metal-to-ligand charge-transfer (MLCT) electronic transitions. The introduction of electron-donating N-ethylcarbazol-3-yl substituent into the triimine acceptor core resulted in the change of the character of the HOMO of Re(I) complexes and a significant increase of molar absorption coefficients of the long-wavelength absorption, which was assigned to a combination of 1MLCT and 1ILCT (intraligand charge-transfer) transitions. Regardless of the appended heteroaromatic group, the emitting excited state of Re(I) terpy-based complexes was demonstrated to have predominant 3MLCT character, as evidenced by comprehensive studies including static and time-resolved emission spectroscopy along with ultrafast transient absorption measurements. The diodes with Re(I) complexes dispersed molecularly in a PVK:PBD matrix were emissive and effects of the complex structure on color of emitted light and its intensity was pronounced. The experimental process involved the reaction of 2-Acetylthiazole(cas: 24295-03-2).Product Details of 24295-03-2
The Article related to quinolinyl carbazolyl terpyridine thiazolylpyridine pyrazinylpyridine rhenium carbonyl complex preparation, crystal mol structure quinolinyl carbazolyl terpyridine thiazolylpyridine pyrazinylpyridine rhenium, electrochem redox quinolinyl carbazolyl terpyridine thiazolylpyridine pyrazinylpyridine rhenium carbonyl and other aspects.Product Details of 24295-03-2
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica