136276-24-9Relevant articles and documents
Stimuli-Responsive Luminescent Bis-Tridentate Ru(II) Complexes toward the Design of Functional Materials
Bar, Manoranjan,Deb, Sourav,Paul, Animesh,Baitalik, Sujoy
, p. 12010 - 12024 (2018)
We report here the synthesis, characterization, and photophysics of two bis-tridentate Ru(II) complexes based on a heteroditopic ligand and thoroughly studied their stimuli-responsive behaviors toward the design of functional materials. Both complexes display emission at room temperature having lifetimes in the range of 0.5-70.0 ns, depending on coligand and solvent. Substantial modulations of absorption and emission spectral behaviors of the complexes were done upon interaction with anions, and anion-induced changes in the properties lead to recognition of selected anions in both organic and aqueous media. Photophysical properties of the complexes were also tuned by changing the pH of the medium, and pKa values in both ground and excited states were determined. The presence of free pyridine-imidazole motifs in the complexes leads to substantial modulation of the optical properties and switching of the emission properties upon interaction with selected cations as well as with protons. Fe2+, Co2+, Ni2+, and Cu2+ trigger emission quenching, while Zn2+ induces finite enhancement of the emission intensity in the complexes. In essence, modulation of the optical properties and switching of luminescence properties of the complexes were accomplished by a variety of the external stimuli such as anions, cations, protons, and pH, as well as solvent polarity. Importantly, the optical outputs in response to an appropriate set of stimuli were utilized to mimic the functions of two-input IMPLICATION, NOR, and XNOR logic gates.
Synthesis, stability and sensitised lanthanide luminescence of heterobimetallic d/f terpyridine complexes
Moore, Evan G.,Benaglia, Massimo,Bergamini, Giacomo,Ceroni, Paola
, p. 414 - 420 (2015)
The synthesis, solution behavior and photophysical properties of several heteronuclear bimetallic d/f complexes that utilise a RuII bis-terpyridine moiety as the sensitiser for EuIII, NdIII and YbIII luminescenc
Demonstration of intramolecular energy transfer in asymmetric bimetallic ruthenium(II) complexes
Bar, Manoranjan,Maity, Dinesh,Das, Shyamal,Baitalik, Sujoy
, p. 17241 - 17253 (2016)
A new family of bimetallic Ru(ii) complexes derived from an asymmetric bridging ligand (tpy-Hbzim-dipy) consisting of both bipyridine and terpyridine chelating sites covalently connected via phenyl-imidazole spacer were designed in this work to demonstrate intramolecular energy transfer from one component to the other in asymmetric dyads. To fine tune the photo-redox properties, both bidentate and tridentate terminal ligands in the complexes were varied systematically. Both steady state and time-resolved luminescence spectral results indicated photo-induced intramolecular energy transfer from the excited MLCT state of the [(bpy/phen)2RuII(dipy-Hbzim-tpy)] component to the MLCT state of the tpy-containing unit [(dipy-Hbzim-tpy)RuII(tpy-PhCH3/H2pbbzim)] in dyads with rate constant values on the order of 106-107 s-1. Temperature-dependent luminescence studies indicated an enhancement in the luminescence intensity and excited state lifetimes upon decreasing the temperature.
Perylene-based bis-, tetrakis-, and hexakis(terpyridine) ligands and their ruthenium(II)-bis(terpyridine) complexes: Synthesis and photophysical properties
El-Batal, Hany,Guo, Kai,Li, Xiaopeng,Wesdemiotis, Chrys,Moorefield, Charles N.,Newkome, George R.
, p. 3640 - 3644 (2013)
A series of metallodendrimers 9-11, as well as their corresponding ligands, were designed and synthesized. These materials integrate perylene as a functional core with IItpy> termini; both chromophores are known for their photovoltaic pro
Efficient selective oxidation of alcohols to carbonyl compounds catalyzed by Ru-terpyridine complexes with molecular oxygen
Han, Qi,Guo, Xiao-Xuan,Zhou, Xian-Tai,Ji, Hong-Bing
, (2019/11/26)
The oxidation of alcohols with molecular oxygen is a promising approach to produce corresponding carbonyl compounds. In this work, efficient aerobic oxidation of alcohols to carbonyl compounds catalyzed by ruthenium-terpyridine [(tpy-PhCH3)RuCl3] with isobutyraldehyde as co-substrate was developed. Various alcohols including primary and secondary alcohols are smoothly converted to corresponding carbonyl compounds in good yield. In a 100 times large-scale oxidation of benzyl alcohol, benzaldehyde was obtained with 92% isolated yield. Moreover, a plausible mechanism involving high-valence ruthenium species was proposed based on in situ UV–vis spectroscopy.
Remote control of electronic coupling-modification of excited-state electron-transfer rates in Ru(tpy)2-based donor-acceptor systems by remote ligand design
Luo, Yusen,Tran, Jens H.,W?chtler, Maria,Schulz, Martin,Barthelmes, Kevin,Winter, Andreas,Rau, Sven,Schubert, Ulrich S.,Dietzek, Benjamin
supporting information, p. 2273 - 2276 (2019/02/27)
A comprehensive understanding of how the molecular structure influences the electronic coupling is crucial in optimizing (supra) molecular assemblies for photoinduced electron transfer. Here, we report that the electronic coupling underlying electron transfer from a phenothiazine donor to a photoexcited Ru(tpy)2 acceptor is modulated by substitution of the second (remote) tpy-ligand.
