136247-34-2Relevant academic research and scientific papers
Ruthenium-bis-terpyridine Complex with two redox-asymmetric amine substituents: Potential-controlled reversal of the direction of charge-transfer
Nie, Hai-Jing,Yao, Chang-Jiang,Sun, Meng-Jia,Zhong, Yu-Wu,Yao, Jiannian
, p. 6223 - 6231 (2014)
A ruthenium-bis-terpyridine complex [Ru(NPhtpy)(Ntpy)]2+ (22+) with two redox-asymmetric amine units has been prepared, where NPhtpy is 4-(di-p-anisylaminophen-4-yl)-2,2:6,2′-terpyridine and Ntpy is 4-(di-p-anisylamino)-2,2:6,2′-terpyridine. This complex displays two consecutive redox couples at +0.82 and +1.02 V vs Ag/AgCl, which are assigned to the N?+/0 processes of the amine components of the NPhtpy and Ntpy ligands, respectively. The mono-oxidized complex 23+ obtained by oxidative electrolysis shows the presence of the charge transfer from ruthenium(II) to the oxidized aminium radical cation of the NPhtpy ligand (MNNPhtpyCT) around 1000 nm. In the dioxidized form (24+), the MNNPhtpyCT transition decreased distinctly and an opposite charge transfer from ruthenium(II) to the oxidized aminium radical cation of the Ntpy ligand (MNNtpyCT) appeared at 1380 nm. Complexes [Ru(NPhtpy)(tpy)]2+ (tpy is 2,2:6,2′-terpyridine), [Ru(Ntpy)(tpy)]2+, and [Ru(NPhtpy)2]2+ have been prepared and studied for the purpose of comparison. TDDFT calculations show that the involvement of the intraligand charge transfer from both NPhtpy and Ntpy ligands is responsible for the enhancement of the visible absorptions of these complexes with respect to [Ru(tpy)2]2+. DFT and TDDFT calculations have been performed on 23+ and 24+ to provide information on the spin distributions and the nature of the near-infrared absorptions. Complex 23+ shows an isotropic EPR signal at room temperature, consistent with an unpaired electron localized on the nitrogen atom.
Triphenylamine-based derivative as well as preparation method and application thereof
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Paragraph 0078-0083, (2020/08/27)
The invention discloses a derivative based on triphenylamine, wherein the derivative has the following structural general formula described in the specification, wherein R is hydrogen, alkyl, alkoxy,C4-C18 aryl, and C1-C18 alkyl substituted or unsubstituted C2-C8 heterocyclic group, and X is nitro, cyano or C1-C18 alkoxy group substituted C1-C16 alkenyl, pyridyl, bipyridyl, terpyridyl, carboxyl substituted C4-C18 aryl hydrazino alkenyl, nitro substituted C4-C18 aryl hydrazino alkenyl, alkyl substituted sulfenyl, and alkoxy substituted sulfenyl. The triphenylamine-based derivative provided bythe invention is used as a hydrogen sulfide probe molecule; it is found that the derivative has high sensitivity and good selectivity to hydrogen sulfide, after a solution containing the probe is contacted with hydrogen sulfide, the fluorescence under ultraviolet light and the color under natural light are obviously different from those before contact, and the hydrogen sulfide can be well identified.
The d10 route to dye-sensitized solar cells: Step-wise assembly of zinc(ii) photosensitizers on TiO2 surfaces
Bozic-Weber, Biljana,Constable, Edwin C.,Hostettler, Nik,Housecroft, Catherine E.,Schmitt, Ralf,Schoenhofer, Ewald
supporting information; experimental part, p. 5727 - 5729 (2012/07/27)
Dye-sensitized solar cells have been assembled using a sequential approach: a TiO2 surface was functionalized with an anchoring ligand, followed by metallation with Zn(OAc)2 or ZnCl2, and subsequent capping with a chromophore functionalized 2,2′:6′,2″- terpyridine; the DSCs exhibit surprisingly good efficiencies confirming the effectiveness of the new strategy for zinc-based DSC fabrication.
Long-Lived Photoinduced Charge Separation and Redox-Type Photochromism on Mesoporous Oxide Films Sensitized by Molecular Dyads
Bonhote, Pierre,Moser, Jacques-E.,Humphry-Baker, Robin,Vlachopoulos, Nicolas,Zakeeruddin, Shaik M.,Walder, Lorenz,Graetzel, Michael
, p. 1324 - 1336 (2007/10/03)
The photoinduced charge separation in three different assemblies composed of an electron donor D and a chromophore sensitizer S adsorbed on nanocrystalline TiO2 films (D-S|TiO2) was investigated. In all of the systems, the sensitizer was a ruthenium(II) bis-terpyridine complex anchored to the semiconductor surface by a phosphonate group. In two of the assemblies, the donor was a 4-(N,N-di-p-anisylamino) phenyl group linked to the 4′ position of the terpyridine, either directly (dyad D1-S) or via a benzyl ether interlocking group (dyad D2-S). In the third system, the sensitizer and the donor (3-(4-(N,N-di-p-anisylamino)phenoxy)-propyl-1-phosphonate) were coadsorbed on the surface ((D3+S)|TiO2). Laser flash photolysis showed that the photoinduced charge separation process follows the sequence D-S*|TiO2 1→ D-S+|(e-)TiO2 2→ D+-S|(e-)TiO2 3→ D-S|TiO2 Resonance Raman spectroscopy indicates that in the excited assemblies D2-S*|TiO2 and (D3+S*)|TiO2, one electron is promoted from the metal center to the terpyridine ligand linked to the semiconductor, whereas in the system D1-S*|TiO2 the excited electron is located on the ligand linked to the donor. The quantum yield of charge separation (steps 1 and 2) was found to be close to unity for the two former assemblies but only 60% for the latter one. In all three cases, the electron injection was very fast (++S)|(e-)TiO2, as in the model system S+|(e-)TiO2; it was 30 μs in D1+-S|(e-)TiO2 and 300 μs in D2+-S|(e-)TiO2. Electrodes made of any of the surface-confined dyads on conducting glass display a strong redox-type photochromism. When a positive potential (+0.5 V vs NHE) is applied to the electrode, charge recombination (step 3) is blocked. As a result, the visible absorption spectrum of the electrode changes, due to the appearance of the absorption feature of the oxidized donor (λmax = 730 nm). Return to the reduced state is achieved by electron injection through the conduction band of the TiO2 under forward bias (-0.5 V). None of the assemblies D1-S|TiO2 and D2-S|TiO2 gave better photovoltaic performances than the model system S|TiO2. This was attributed in the first case to the low injection efficiency and, in the second case, to an additional short-circuiting pathway constituted by the charge percolation inside the molecular monolayer and to the underlying conducting glass, as previously observed with monolayers of the donor D3 (Bonhote, P.; Gogniat, E.; Tingry, S.; Barbe, C.; Vlachopoulos, N.; Lenzmann, F.; Comte, P.; Graetzel, M. J. Phys. Chem. B 1998, 102, 1498-1507).
