1309876-49-0Relevant academic research and scientific papers
Isolation and Structures of 1,2,3-Triazole-Derived Mesoionic Biscarbenes with Bulky Aromatic Groups
Iwasaki, Haruka,Yamada, Yuji,Ishikawa, Ryuta,Koga, Yuji,Matsubara, Kouki
, p. 1651 - 1654 (2016)
1,2,3-Triazole-derived mesoionic biscarbenes bridged by a pyridylene group were synthesized and their structures were determined. Bulky substituents on the carbene rings stabilized the carbenes, which enabled their crystal structures to be determined. As implied by DFT calculations and the experimental results, the carbenes are partly reduced to anionic radical species in the presence of strong bases. This suggests that the pyridylene and triazolylidene moieties endow molecules with both electron-acceptor and -donor properties. A rare example of an iron complex with a pincer carbene was synthesized. 1,2,3-Triazole-derived mesoionic biscarbenes bridged by a pyridylene group are synthesized and characterized. The carbenes are thought to be partly reduced to anionic radical species in the presence of strong bases, which suggests that these moieties endow molecules with both electron-acceptor and -donor properties. A rare example of an iron complex with a pincer carbene is synthesized.
Bis(tridentate) ruthenium-terpyridine complexes featuring microsecond excited-state lifetimes
Brown, Douglas G.,Sanguantrakun, Nawaporn,Schulze, Benjamin,Schubert, Ulrich S.,Berlinguette, Curtis P.
supporting information; scheme or table, p. 12354 - 12357 (2012/09/05)
A series of heteroleptic bis(tridentate) ruthenium(II) complexes, each bearing a substituted 2,2′:6′,2″-terpyridine (terpy) ligand, is characterized by room temperature microsecond excited-state lifetimes. This observation is a consequence of the strongly σ-donating and weakly π-accepting tridentate carbene ligand, 2′,6′-bis(1-mesityl-3- methyl-1,2,3-triazol-4-yl-5-idene)pyridine (C^N^C), adjacent to the terpy maintaining a large separation between the ligand field and metal-to-ligand charge transfer (MLCT) states while also preserving a large 3MLCT energy. The observed lifetimes are the highest documented lifetimes for unimolecular ruthenium(II) complexes and are four orders in magnitude higher than that associated with [Ru(terpy)2]2+.
