Designing and fabrication of phenothiazine and carbazole based sensitizers for photocatalytic water splitting application

Kumar, Nadavala Siva; Dhar, Abhishek; Ibrahim, Ahmed A.; Vekariya, Rohit L.; Bhadja, Poonam

doi:10.1016/j.ijhydene.2018.07.138

Cited by 5 publications

(2 citation statements)

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“…Many photosensitizers have been synthesized using Earthabundant elements, including inorganic complexes incorporating metals such as chromium, iron, copper or zinc, [12,13] and purely organic dyes. [14][15][16][17][18] Organic photosensitizers include commonly used dyes such as coumarins [19] or eosin Y, [20] as well as bodipy compounds. [21][22][23][24] Earth-abundant photosensitizers and dyes have been employed in applications such as solar cells.…”

Section: Introductionmentioning

confidence: 99%

Phenoxazine‐Sensitized CO₂‐to‐CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties‐Catalytic Performance Study

et al. 2022

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We have evaluated six phenoxazine derivatives as visible light photosensitizers for the photochemical reduction of CO2 to CO with an iron porphyrin catalyst in organic media. The phenoxazine core was functionalized with electron‐donating or ‐withdrawing groups to modify the photophysical properties. Both singlet and triplet excited state potentials of the sensitizers spanned several hundred mV range and the ground state oxidation potentials spanned 250 mV. We observed that no correlation can be established between the production of CO and the excited state potential of the phenoxazine, which determines the driving force for electron transfer to the catalyst. On the contrary, a clear correlation can be made between the oxidation potentials of the phenoxazine and the production of CO. This observation indicates that the process was limited by photosensitizer regeneration and highlights the fact that electron transfers not directly related to the catalyst activation could play a key role in homogeneous photocatalytic systems.

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Section: Introductionmentioning

confidence: 99%

Phenoxazine‐Sensitized CO₂‐to‐CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties‐Catalytic Performance Study

et al. 2022

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“…Phenothiazine-based dyes, featuring thiophene-based spacers and different anchoring groups, have been extensively studied [19], determining an improvement of visible light H 2 generation of Pt/TiO 2 by the effect of the spacer structure [58] and the insertion of a peripheral glucose unit as co-adsorbent ( Figure 5) [59]. Other phenothiazine-and carbazole-based dyes were designed for the same application [60], including a D-π-A-π-A photosensitizer, with benzothiadiazole as auxiliary electron withdrawing unit [61], and, in particular, a dibenzopyrromethene (BODIPY)-conjugated phenothiazine, which gave Pt/TiO 2 high activity up to near-infrared (NIR) region [62]. Different types of photoactive compounds can be included in the design of a dye with specific structure: some D-A-π-A perylene dyes, featuring cyanoacrylic acid and dicyanomethylene rhodamine as the acceptor/anchoring group, combined with a N-annulated perylene donor and a quinoxaline auxiliary acceptor [63]; two triphenylamine-benzimidazole-based dyes bound on TiO 2 , with Cu 2 WS 4 nanocubes as an alternative water splitting co-catalyst to Pt [64]; a particular composite dye, consisting of π-conjugated indoline-rhodanine with a chlorophyll derivative, which induced panchromatic absorption in the visible range, efficient electron transfer, and prolonged stability [65]; a series of dyes with triphenylamine donor, vinyltiophene bridge, and a cationic pyridinium acceptor (cationic D-π-A photosensitizers) [66].…”

Section: Organic Dye-sensitized Tiomentioning

confidence: 99%

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

2020

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Solar radiation is becoming increasingly appreciated because of its influence on living matter and the feasibility of its application for a variety of purposes. It is an available and everlasting natural source of energy, rapidly gaining ground as a supplement and alternative to the nonrenewable energy feedstock. Actually, an increasing interest is involved in the development of efficient materials as the core of photocatalytic and photothermal processes, allowing solar energy harvesting and conversion for many technological applications, including hydrogen production, CO2 reduction, pollutants degradation, as well as organic syntheses. Particularly, photosensitive nanostructured hybrid materials synthesized coupling inorganic semiconductors with organic compounds, and polymers or carbon-based materials are attracting ever-growing research attention since their peculiar properties overcome several limitations of photocatalytic semiconductors through different approaches, including dye or charge transfer complex sensitization and heterostructures formation. The aim of this review was to describe the most promising recent advances in the field of hybrid nanostructured materials for sunlight capture and solar energy exploitation by photocatalytic processes. Beside diverse materials based on metal oxide semiconductors, emerging photoactive systems, such as metal-organic frameworks (MOFs) and hybrid perovskites, were discussed. Finally, future research opportunities and challenges associated with the design and development of highly efficient and cost-effective photosensitive nanomaterials for technological claims were outlined.

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Polycarbazole and its derivatives: progress, synthesis, and applications

Nayana

Kandasubramanian

2020

J Polym Res

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Designing and fabrication of phenothiazine and carbazole based sensitizers for photocatalytic water splitting application

Cited by 5 publications

References 31 publications

Phenoxazine‐Sensitized CO₂‐to‐CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties‐Catalytic Performance Study

Phenoxazine‐Sensitized CO₂‐to‐CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties‐Catalytic Performance Study

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

Polycarbazole and its derivatives: progress, synthesis, and applications

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Designing and fabrication of phenothiazine and carbazole based sensitizers for photocatalytic water splitting application

Cited by 5 publications

References 31 publications

Phenoxazine‐Sensitized CO2‐to‐CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties‐Catalytic Performance Study

Phenoxazine‐Sensitized CO2‐to‐CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties‐Catalytic Performance Study

Photosensitive Hybrid Nanostructured Materials: The Big Challenges for Sunlight Capture

Polycarbazole and its derivatives: progress, synthesis, and applications

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Product

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Phenoxazine‐Sensitized CO₂‐to‐CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties‐Catalytic Performance Study

Phenoxazine‐Sensitized CO₂‐to‐CO Reduction with an Iron Porphyrin Catalyst: A Redox Properties‐Catalytic Performance Study