18511-69-8Relevant articles and documents
Ruthenium bipyridyl compounds with two terminal alkynyl ligands
Adams, Christopher J.,Bowen, Lucy E.,Humphrey, Mark G.,Morrall, Joseph P. L.,Samoc, Marek,Yellowlees, Lesley J.
, p. 4130 - 4138 (2004)
Compounds of the form Ru(X2bipy)(PPh3) 2(-C≡CC6H4NO2-p)2 (X2 bipy = 4,4′-X2-2,2′-bipyridine, X = Me 3a, Br 3b, I 3c) have been synthesised from the mono-alkynyl precursors Ru(X 2bipy)(PPh3)2(-C≡CC6H 4NO2-p)Cl (X = Me 2a, Br 2b, I 2c); the former are the first ruthenium bis-alkynyl compounds that also contain a bipyridyl ligand. Spectroelectrochemical investigation of 3a shows that the metal is readily oxidised to form the ruthenium(III) compound 3a+, and will also undergo a single-electron reduction at each nitro group to form 3a2-. ESR and UV/visible spectra of these redox congeners are presented. We also report the synthesis of [Ru(Me2bipy)(PPh3) 2-(-C≡CBu1)(N≡N)][PF6] 4 during the attempted synthesis of Ru(Me2bipy)(PPh3) 2(-C≡CBu1)2, and report its X-ray crystal structure and IR spectrum. X-Ray crystal structures of 3b and 3c (as two different solvates) are presented, and the nature of the inlermolecular interactions seen therein is discussed. Z-Scan measurements on Ru(Me 2bipy)(PPh3)2-(-C≡CR)Cl (R = C 6H4NO2-p 2a, But, Ph, C 6H4Me) are also reported, and show that Ru(Me 2bipy)(PPh3)2(-C≡CR)-Cl (R = C 6H4NO2-p 2a, Ph) exhibit moderate third-order non-linearities.
New bipyridyl ligands bearing azo- and imino-linked chromophores. Synthesis and nonlinear optical studies of related dipolar zinc complexes?
Hilton, Adam,Renouard, Thierry,Maury, Olivier,Le Bozec, Hubert,Ledoux, Isabelle,Zyss, Joseph
, p. 2521 - 2522 (1999)
The synthesis and optical properties of 4,4'-bis(dialkylaminophenylazo)- 2,2'-bipyridine and 4,4'-bis(dialkylaminophenylimino)-2,2'-bipyridine ligands are described; the corresponding dipolar bipyridyl zinc dichloride complexes have been prepared and thei
Ruthenium(II) photosensitizers with electron-rich diarylamino-functionalized 2,2′-bipyridines and their application in dye-sensitized solar cells
Wang, Qiwei,Wu, Wenjun,Ho, Cheuk-Lam,Xue, Liqin,Lin, Zhenyang,Li, Hua,Lo, Yih Hsing,Wong, Wai-Yeung
, p. 5322 - 5330 (2014)
New ruthenium(II) photosensitizers [Ru(dcbpy)(L)(NCS)2] (dcbpy = 4,4′-dicarboxylic acid-2,2′-bipyridine; L = 4,4′-bis{di[4-(N,N′-dimethylamino)phenyl]amino}-2,2′-bipyridine (1), 4,4′-bis[di(4-methoxyphenyl)amino]-2,2′-bipyridine (2), and 4,4′-bis[di(4-tolyl)amino]-2,2′-bipyridine (3)) were prepared and characterized and their application in dye-sensitized solar cells is presented. The optical absorption of these photosensitizers gives a peak at around 540 nm, which is very similar to that of the standard N719. The maximum incident photon-to-current conversion efficiency (IPCE) of 80.6% was obtained for 3, which corresponded to a power conversion efficiency (η) of 5.68% under standard air mass (AM) 1.5 sunlight (versus N719 at 6.76%). Molecular cosensitization of 3 with an organic dye, QS-DPP-I, yielded higher η values up to 6% relative to the cells based on individual photosensitizers, and the corresponding IPCE can reach 93.6% at 549 nm. A preliminary stability test of the devices was also conducted.
Hydroxyl and amino functionalized cyclometalated Ir(III) complexes: Synthesis, characterization and cytotoxicity studies
Wu, Zhaozhen,Mu, Juanjuan,Wang, Qiong,Chen, Xing,Jensen, Lasse,Yi, Changqing,Li, Mei-Jin
, p. 175 - 182 (2015)
A series of Ir(III) complexes (?N)2Ir(N N) (N N are 4,4′-dihydroxy-2,2′-bipyridine and 4,4′-diamino-2,2′-bipyridine, and ?N are phenylpyridine, benzo[h]quinolone, and 2-phenylquinoline) were synthesized and characterized. Two of the complexes were structurally characterized via X-ray crystallography. The photophysical and photochemical properties of these complexes were studied. Preliminary studies of their applications on pH sensing, and cell imaging were also performed.
Electronic effects on reactivity and anticancer activity by half-sandwich N,N-chelated iridium(iii) complexes
Guo, Lihua,Zhang, Hairong,Tian, Meng,Tian, Zhenzhen,Xu, Yanjian,Yang, Yuliang,Peng, Hongwei,Liu, Peng,Liu, Zhe
, p. 16183 - 16192 (2018/10/04)
The synthesis and characterization of a series of organometallic half-sandwich N,N-chelated iridium(iii) complexes bearing a range of electron-donating and withdrawing substituents were described. The X-ray crystal structures of complexes 1, 3 and 5 have been determined. This work demonstrated how the aqueous chemistry, catalytic activity in converting coenzyme NADH to NAD+ and anticancer activity can be controlled and fine-tuned by the modification of the ligand electronic perturbations. In general, the introduction of an electron-withdrawing group (-Cl and-NO2) on the bipyridine ring resulted in increased anticancer activity, whereas an electron-donating group (-NH2,-OH and-OCH3) decreased the anticancer activity. Complex 6 bearing a strongly electron-withdrawing NO2 group displayed the highest anticancer activity (7.3 ± 1.2 μM), ca. three times as active as cisplatin in the A549 cell line. Notably, selective cytotoxicity for cancer cells over normal cells was observed for complexes 1 and 6. DNA binding does not seem to be the primary mechanism for cancer fighting. However, the aqueous chemistry, cell apoptosis and cell cycle, which show similar dependence on the ligand electronic perturbations as the anticancer activity, appear to together contribute to the anticancer potency of theses complexes. This work may provide an alternative strategy to enhance anticancer activity for these N,N-chelated organometallic half-sandwich iridium(iii) complexes.
