65115-91-5Relevant articles and documents
Thermal stability of bidendate nitrogen ligands tethered to multiwall carbon nanotubes
Howell, Bob A.,Dumitrascu, Adina
, p. 505 - 512 (2010)
Bidendate nitrogen ligands, particularly 1,10-phenanthroline, form stable complexes with a variety of divalent metal ions. If these ligands are attached to a stable, inert platform, then they may be used for sequestering transition metal ions from a range of aqueous solutions including many that form components of industrial processes. Alternatively, they may function as a base for the development of durable heterogeneous catalysts. These ligands may be tethered to carboxyl-functionalized carbon nanotubes via an ethylene oxide linker through either an ether or ester bond. The suitability of these adducts for a variety of applications has been assessed using thermogravimetry. Both kinds of adducts are thermally robust with an onset of degradation above 400 °C.
Molecular engineering for optical properties of 5-substituted-1,10-phenanthroline-based Ru(ii) complexes
Beley, Marc,Blanchard-Desce, Mireille,Chevreux, Sylviane,Gros, Philippe C.,Lawson-Daku, Latévi Max,Lemercier, Gilles,Mongin, Olivier,Moreau, Juliette,Rousset, Elodie
, p. 10119 - 10132 (2021/08/03)
A series of homo- and heteroleptic Ru(ii) complexes[Ru(phen)3?n(phen-X)n](PF6)2(n= 0-3, X = CN, epoxy, H, NH2) were prepared and characterized. The influence of electron-withdrawing or electron-releasing substituents of the 1,10-phenanthroline ligands on the photo-physical properties was evaluated. It reveals fundamental interests in the fine tuning of redox potentials and photo-physical characteristics, depending both on the nature of the substitution of the ligand, and on the symmetry of the related homo- or heteroleptic complex. These complexes exhibit linear absorption and two-photon absorption (2PA) cross-sections over a broad range of wavelength (700-900 nm) due to absorption in the intra-ligand charge transfer (ILCT) and the metal-to-ligand charge transfer (MLCT) bands. These 2PA properties were more particularly investigated in the 700-1000 spectral range for a family of complexes bearing electro-donating ligands (phen-NH2).
A ruthenium tetrazole complex-based high efficiency near infrared light electrochemical cell
Shahroosvand, Hashem,Abaspour, Saeid,Pashaei, Babak,Radicchi, Eros,De Angelis, Filippo,Bonaccorso, Francesco
, p. 6211 - 6214 (2017/07/10)
We report on the exploitation of a new tetrazole-substituted 1,10-phenanthroline and a 2,2′-bipyridine (bpy) ancillary ligand modified with an electron-donating group in cationic ruthenium complexes. This complex, placed in between two electrodes without any polymer, demonstrates high efficiency near-infrared (NIR) electroluminescence (EL). The comparison between bpy and its methyl-substituted ancillary ligand shows that the cationic Ru tetrazolate complex containing methyl groups exhibits a red shift in the EL wavelength from 620 to 800 nm compared to [Ru(bpy)3]2+ and an almost twofold reduction in the turn-on voltage, i.e., from 5 to 3 V, with respect to 5-tetrazole-1,10-phenanthroline. An external quantum efficiency of 0.95% for the dimethyl derivative is demonstrated, which is a remarkable result for non-doped NIR light electrochemical cells based on ruthenium polypyridyl.