A New Ruthenium Sensitizer Containing Benzo[1,9]quinolizino(acridin-2-yl)vinyl-2,2′-bipyridine Ligand for Effective Nanocrystalline Dye-Sensitized Solar Cells

Kim, Jeum‐Jong; Yoon, Jeonghun; Kim, Eun Jung; Kim, Bo Ram; Yoon, Young-Gui; Kang, Man-Gu

doi:10.1155/2012/743947

Cited by 4 publications

(2 citation statements)

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“…Kim et al 108 reported a novel ruthenium bpy sensitizer, 63 (JJ-12), incorporating the highly conjugated benzo [1,9]quinolizino-(acridin-2-yl)vinyl-2,2-bpy ligand and its excellent photovoltaic performances in DSSCs. Owing to increased π-conjugation in the ancillary ligand and the donor capability of benzo [1,9]quinolizinoacridine, the low-energy MLCT band of JJ-12 was 10 nm red-shifted relative to that of N3.…”

Section: Chemical Reviewsmentioning

confidence: 99%

Influence of Ancillary Ligands in Dye-Sensitized Solar Cells

et al. 2016

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Dye-sensitized solar cells (DSSCs) have motivated many researchers to develop various sensitizers with tailored properties involving anchoring and ancillary ligands. Ancillary ligands carry favorable light-harvesting abilities and are therefore crucial in determining the overall power conversion efficiencies. The use of ancillary ligands having aliphatic chains and/or π-extended aromatic units decreases charge recombination and permits the collection of a large fraction of sunlight. This review aims to provide insight into the relationship between ancillary ligand structure and DSSC properties, which can further guide the function-oriented design and synthesis of different sensitizers for DSSCs. This review outlines how the new and rapidly expanding class of chelating ancillary ligands bearing 2,2'-bipyridyl, 1,10-phenanthroline, carbene, dipyridylamine, pyridyl-benzimidazole, pyridyl-azolate, and other aromatic ligands provides a conduit for potentially enhancing the performance and stability of DSSCs. Finally, these classes of Ru polypyridyl complexes have gained increasing interest for feasible large-scale commercialization of DSSCs due to their more favorable light-harvesting abilities and long-term thermal and chemical stabilities compared with other conventional sensitizers. Therefore, the main idea is to inspire readers to explore new avenues in the design of new sensitizers for DSSCs based on different ancillary ligands.

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Section: Chemical Reviewsmentioning

confidence: 99%

Influence of Ancillary Ligands in Dye-Sensitized Solar Cells

et al. 2016

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“…Of a more recent vintage are polycyclic, planarized TAs with enhanced π-conjugation. Examples of such planar TAs (see Figure ) are dimethylmethylene-bridged MeTA ( MeTA = 4,4,8,8,12,12-hexamethyl-4 H ,8 H ,12 H -benzo[1,9]quinolizino-[3,4,5,6,7- defg ]acridine), where the methylene straps prevent the twisting of the phenyl rings around the C–N bonds, − and the oxygen-bridged analogue TOTA ( TOTA = 2,2′:6′,2″:6″,6-trioxotriphenylamine), which is bowl shaped in the neutral state but completely planar as the radical cation. ,− 2,2′:6′,2″-Dioxotriphenylamine ( DOTA ) with one fewer ether strap is in contrast skewed with an interplanar angle of 43.0° between the unbridged phenyl rings, which is reduced to 38.3° after oxidation to its radical cation. ,− …”

Section: Introductionmentioning

confidence: 99%

Charge and Spin Delocalization in Mixed-Valent Vinylruthenium–Triarylamine-Conjugates with Planarized Triarylamines

et al. 2022

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We report on three new vinylruthenium−triarylamine (TA) conjugates with planarized TA substituents. The neutral, mono-, and dioxidized forms of the complexes were scrutinized by UV/vis/NIR, IR, and EPR spectroscopies as well as by quantum chemical calculations. By analyzing the intervalence charge-transfer (IVCT) transitions of the mixed-valent radical cations, we obtain information on the extent of electronic coupling between the chemically different redox sites. Completely delocalized Ru-MeTA + shows a vibrationally structured, nonsolvatochromic IVCT band. Decreased blueshifts of the indicative Ru(CO) stretching vibration during the first oxidation and larger A( 14 N) EPR hyperfine splitting constants in concert with smaller gvalues indicate enhanced TA contributions to the singly occupied molecular orbital of the other two complexes Ru-TOTA •+ and Ru-DOTA •+ and hence less symmetrical charge and spin density distributions. This is also reflected by the solvatochromism and the asymmetric shape of the IVCT band with a smaller bandwidth at the low-energy side. Temperature-dependent UV/vis/NIR spectroscopy of mixed-valent Ru-TOTA •+ and Ru-DOTA •+ revealed that the band skewing is due to the vibrational coupling of the IVCT transition to symmetrical vibrations, placing these radical cations near or at the class II/III borderline according to Robin and Day.

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Harnessing Light and CO₂ With Copper‐Nickel on TiO₂ Photocatalysts for Methanol Production

Mutiara,

Saputera,

Utomo

et al. 2024

ChemCatChem

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The contemporary focus on global concerns such as carbon dioxide (CO2) emissions impacting the environment and contributing to the energy crisis has prompted exploration into alternatives, with photocatalysis emerging as a potential solution. This research involved the development of a pure TiO2 (PT) photocatalyst, synthesized through the hydrothermal method and enhanced with double co‐catalysts of copper and nickel via the wet impregnation technique. The characteristics of the resulting photocatalysts were comprehensively examined using various techniques, including XRD, Raman, UV‐Vis DRS, surface area and pore analysis, SEM‐EDX, HRTEM, XPS, PL, and EPR. The characterization outcomes revealed that the PT phase comprised anatase, brookite, and rutile. In the activity test, CNT‐4 (Cu‐Ni/TiO2‐400) exhibited the highest methanol yield at 772.41 μmole g‐1 h‐1, followed by CONTT‐4 (CuO‐NiTiO3/TiO2‐400) with 750.38 μmole g‐1 h‐1 after three hours of irradiation using a 300 W xenon lamp, while methanol in PT formed only after three hours of irradiation. The presence of cocatalysts significantly influenced methanol yield, attributed to the increased active sites for the reaction and the reduced band gap, impacting light absorption optimization and suppressing electron‐hole recombination. In CNT‐4, the formation of Ti3+ associated with oxygen vacancies facilitated the generation of more products.

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A New Ruthenium Sensitizer Containing Benzo[1,9]quinolizino(acridin-2-yl)vinyl-2,2′-bipyridine Ligand for Effective Nanocrystalline Dye-Sensitized Solar Cells

Cited by 4 publications

References 36 publications

Influence of Ancillary Ligands in Dye-Sensitized Solar Cells

Influence of Ancillary Ligands in Dye-Sensitized Solar Cells

Charge and Spin Delocalization in Mixed-Valent Vinylruthenium–Triarylamine-Conjugates with Planarized Triarylamines

Harnessing Light and CO₂ With Copper‐Nickel on TiO₂ Photocatalysts for Methanol Production

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A New Ruthenium Sensitizer Containing Benzo[1,9]quinolizino(acridin-2-yl)vinyl-2,2′-bipyridine Ligand for Effective Nanocrystalline Dye-Sensitized Solar Cells

Cited by 4 publications

References 36 publications

Influence of Ancillary Ligands in Dye-Sensitized Solar Cells

Influence of Ancillary Ligands in Dye-Sensitized Solar Cells

Charge and Spin Delocalization in Mixed-Valent Vinylruthenium–Triarylamine-Conjugates with Planarized Triarylamines

Harnessing Light and CO2 With Copper‐Nickel on TiO2 Photocatalysts for Methanol Production

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Harnessing Light and CO₂ With Copper‐Nickel on TiO₂ Photocatalysts for Methanol Production