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Nikolaou V, Govind C, Balanikas E, Bharti J, Diring S, Vauthey E, Robert M, Odobel F. Antenna Effect in Noble Metal-Free Dye-Sensitized Photocatalytic Systems Enhances CO 2 -to-CO Conversion. Angew Chem Int Ed Engl 2024; 63:e202318299. [PMID: 38314922 DOI: 10.1002/anie.202318299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/31/2024] [Accepted: 01/31/2024] [Indexed: 02/07/2024]
Abstract
Dye-sensitized photocatalytic systems (DSPs) have been extensively investigated for solar-driven hydrogen (H2 ) evolution. However, their application in carbon dioxide (CO2 ) reduction remains limited. Furthermore, current solar-driven CO2 -to-CO DSPs typically employ rhenium complexes as catalysts. In this study, we have developed DSPs that incorporate noble metal-free components, specifically a zinc-porphyrin as photosensitizer (PS) and a cobalt-quaterpyridine as catalyst (CAT). Taking a significant stride forward, we have achieved an antenna effect for the first time in CO2 -to-CO DSPs by introducing a Bodipy as an additional chromophore to enhance light harvesting efficiency. The energy transfer from Bodipy to zinc porphyrin resulted in remarkable stability (turn over number (TON)=759 vs. CAT), and high CO evolution activity (42 mmol g-1 h-1 vs. CAT).
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Affiliation(s)
- Vasilis Nikolaou
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
| | - Chinju Govind
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Evangelos Balanikas
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Jaya Bharti
- Laboratoire d'Electrochimie Moléculaire, Université Paris Cité, CNRS, F-75006, Paris, France
| | - Stéphane Diring
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
| | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211, Geneva, Switzerland
| | - Marc Robert
- Laboratoire d'Electrochimie Moléculaire, Université Paris Cité, CNRS, F-75006, Paris, France
- Institut Universitaire de France (IUF), F-75005, Paris, France
| | - Fabrice Odobel
- Nantes Université, CNRS, CEISAM, UMR 6230, F-44000, Nantes, France
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Bharti J, Chen L, Guo Z, Cheng L, Wellauer J, Wenger OS, von Wolff N, Lau KC, Lau TC, Chen G, Robert M. Correction to "Visible-Light-Driven CO 2 Reduction with Homobimetallic Complexes. Cooperativity between Metals and Activation of Different Pathways". J Am Chem Soc 2024; 146:1208. [PMID: 38153202 DOI: 10.1021/jacs.3c14220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
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Bharti J, Chen L, Guo Z, Cheng L, Wellauer J, Wenger OS, von Wolff N, Lau KC, Lau TC, Chen G, Robert M. Visible-Light-Driven CO 2 Reduction with Homobimetallic Complexes. Cooperativity between Metals and Activation of Different Pathways. J Am Chem Soc 2023; 145:25195-25202. [PMID: 37947126 DOI: 10.1021/jacs.3c07799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Visible-light-driven reduction of CO2 to both CO and formate (HCOO-) was achieved in acetonitrile solutions using a homobimetallic Cu bisquaterpyridine complex. In the presence of a weak acid (water) as coreactant, the reaction rate was enhanced, and a total of ca. 766 TON (turnover number) was reached for the CO2 reduction, with 60% selectivity for formate and 28% selectivity for CO, using Ru(phen)32+ as a sensitizer and amines as sacrificial electron donors. Mechanistic studies revealed that with the help of cooperativity between two Cu centers, a bridging hydride is generated in the presence of a proton source (water) and further reacts with CO2 to give HCOO-. A second product, CO, was also produced in a parallel competitive pathway upon direct coordination of CO2 to the reduced complex. Mechanistic studies further allowed comparison of the observed reactivity to the monometallic Cu quaterpyridine complex, which only produced CO, and to the related homobimetallic Co bisquaterpyridine complex, that has been previously shown to generate formate following a mechanism not involving the formation of an intermediate hydride species.
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Affiliation(s)
- Jaya Bharti
- Université Paris Cité, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75013, Paris, France
| | - Lingjing Chen
- School of Environment and Civil Engineering, Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, P. R. China
| | - Zhenguo Guo
- Department of Chemistry and Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, P. R. China
| | - Lin Cheng
- Department of Chemistry and Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, P. R. China
| | - Joël Wellauer
- Department of Chemistry, Universität Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Oliver S Wenger
- Department of Chemistry, Universität Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Niklas von Wolff
- Université Paris Cité, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75013, Paris, France
| | - Kai-Chung Lau
- Department of Chemistry and Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, P. R. China
| | - Tai-Chu Lau
- School of Environment and Civil Engineering, Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, P. R. China
- Department of Chemistry and Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, P. R. China
| | - Gui Chen
- School of Environment and Civil Engineering, Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, P. R. China
| | - Marc Robert
- School of Environment and Civil Engineering, Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, P. R. China
- Institut Universitaire de France (IUF), F-75005, Paris, France
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Bharti J, Sonthalia S, Patil P, Dhurat R. Scalp threading with polydioxanone monofilament threads: a novel, effective and safe modality for hair restoration. J Eur Acad Dermatol Venereol 2017; 31:e492-e493. [PMID: 28502076 DOI: 10.1111/jdv.14336] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Bharti
- Department of Dermatology; Paras Hospital; Gurgaon India
| | - S. Sonthalia
- SKINNOCENCE: The Skin Clinic; C-2246 Sushant Lok-1 Gurugram India
| | - P. Patil
- Skin Radiance Clinic; Civil lines; Gurugram India
| | - R. Dhurat
- Department of Dermatology; L.T.M. Medical College and General Hospital; Sion Mumbai Maharashtra India
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Abstract
INTRODUCTION It has been demonstrated earlier that exposure to ethanol and/or arsenic compounds (such as sodium arsenite) produces toxic effects as shown by both in vitro and in vivo experiments. Chronic exposure of humans to arsenic through drinking water, pesticides or consumption of alcoholic beverages has produced major health problem and concern in recent years. Water being one of the main ingredients for alcohol formation (beer fermentation process) can lead to contamination with arsenic. Thus, people consuming such alcohol are getting continuously exposed to arsenic compounds as well along with alcohol. AIM The present study was undertaken to investigate the effect of alcohol co-administration on arsenic induced changes in carbohydrate metabolic status in adult male albino rats. MATERIALS AND METHODS Adult male albino rats of Wistar strain (weighing~100g) were divided into three groups (n=8 rats/group) including Control or vehicle treated (C), Arsenic treated (As) and Arsenic treated alcohol co-exposed (As+Alc). Treatment with Sodium-arsenite included intra-peritoneal injection consecutively for 14 days at a dose of 5.55 mg/kg (equivalent to 35% of LD50) per day. Absolute alcohol (15% v/v) was fed at a dose of 0.5 ml/100 g body weight per day for five consecutive days from start of the treatment schedule. Distilled water (D/W) was used as vehicle. Blood Glucose (BG) level, levels of glycogen, Pyruvic Acid (PA), Free Amino Acid Nitrogen (FAAN), total protein, Glutamate Oxalate transaminase (GOT) and Glutamate Pyruvate Transaminase (GPT) activity, and glucose-6-phosphatase (G6Pase) activity were measured in tissues including liver, kidney and muscle. RESULTS Treatment with arsenic decreased the levels of BG, liver glycogen and PA, tissue protein and G6Pase activity, GOT activity in liver and muscle, and increased free amino acid content in kidney and muscle, GPT activity in liver and kidney. Alcohol administration to rats co-exposed to arsenic treatment reversed these changes. CONCLUSION Thus, it is suggested that combined administration of alcohol with arsenic can result in the suppression of the down-regulating action of arsenic on glucose homeostasis as evidenced by its hypoglycaemic effect and increased gluconeogenesis and transamination in liver.
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Affiliation(s)
- Purnima Singh
- Associate Professor, Department of Physiology, M. B. Kedia Dental College, Chhapkaiya, Birgunj, Nepal
| | - Shubha Ranjan Dutta
- Assistant Professor, Department of Oral and Maxillofacial Surgery, M. B. Kedia Dental College, Chhapkaiya, Birgunj, Nepal
| | - Deepak Passi
- Tutor, Department of Oral and Maxillofacial Surgery, ESIC Dental College and Hospital, Rohini, Delhi, India
| | - Jaya Bharti
- Dental Surgeon, Karuna Hospital, Delhi, india
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