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Hezam A, Alkanad K, Bajiri MA, Strunk J, Takahashi K, Drmosh QA, Al-Zaqri N, Krishnappagowda LN. 2D/1D MoS 2 /TiO 2 Heterostructure Photocatalyst with a Switchable CO 2 Reduction Product. Small Methods 2023; 7:e2201103. [PMID: 36408777 DOI: 10.1002/smtd.202201103] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/15/2022] [Indexed: 06/16/2023]
Abstract
Regulating the transfer pathway of charge carriers in heterostructure photocatalysts is of great importance for selective CO2 photoreduction. Herein, the charge transfer pathway and in turn the redox potential succeeded to regulate in 2D MoS2 /1D TiO2 heterostructure by varying the light wavelength range. Several in situ measurements and experiments confirm that charge transfer follows either an S-scheme mechanism under simulated solar irradiation or a heterojunction approach under visible light illumination, elucidating the switchable property of the MoS2 /TiO2 heterostructure. Replacing the simulated sunlight irradiation with the visible light illumination switches the photocatalytic CO2 reduction product from CO to CH4. 13 CO2 isotope labeling confirms that CO2 is the source of carbon for CH4 and CO products. The photoelectrochemical H2 generation further supports the switching property of MoS2 /TiO2 . Unlike previous studies, density functional theory calculations are used to investigate the band structure of Van der Waals MoS2 /TiO2 S scheme after contact, allowing to propose accurate charge transfer pathways, in which the theoretical results are well matched with the experimental results. This work opens the opportunity to develop photocatalysts with switchable charge transport and tunable redox potential for selective artificial photosynthesis.
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Affiliation(s)
- Abdo Hezam
- Leibniz-Institute for Catalysis, University of Rostock, 18059, Rostock, Germany
| | - Khaled Alkanad
- Department of Studies in Physics, University of Mysore, Manasagangotri, Mysuru, 570 006, India
| | - Mohammed Abdullah Bajiri
- Department of Studies and Research in Industrial Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta, 577 451, India
| | - Jennifer Strunk
- Leibniz-Institute for Catalysis, University of Rostock, 18059, Rostock, Germany
| | - Keisuke Takahashi
- Department of Chemistry, Hokkaido University, Sapporo, 060-0815, Japan
| | - Qasem Ahmed Drmosh
- Interdisciplinary Research Center for Hydrogen and Energy Storage, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Nabil Al-Zaqri
- Department of Chemistry, College of Science, King Saud University, Riyadh, P.O. Box 2455, Saudi Arabia
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Alkanad K, Hezam A, Al-Zaqri N, Bajiri MA, Alnaggar G, Drmosh QA, Almukhlifi HA, Neratur Krishnappagowda L. One-Step Hydrothermal Synthesis of Anatase TiO 2 Nanotubes for Efficient Photocatalytic CO 2 Reduction. ACS Omega 2022; 7:38686-38699. [PMID: 36340094 PMCID: PMC9631917 DOI: 10.1021/acsomega.2c04211] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/03/2022] [Indexed: 05/14/2023]
Abstract
The hydrothermal dissolution-recrystallization process is a key step in the crystal structure of titania-based nanotubes and their composition. This work systematically studies the hydrothermal conditions for directly synthesizing anatase TiO2 nanotubes (ATNTs), which have not been deeply discussed elsewhere. It has been well-known that ATNTs can be synthesized by the calcination of titanate nanotubes. Herein, we found the ATNTs can be directly synthesized by optimizing the reaction temperature and time rather than calcination of titanate nanotubes, where at each temperature, there is a range of reaction times in which ATNTs can be prepared. The effect of NaOH/TiO2 ratio and starting materials was explored, and it was found that ATNTs can be prepared only if the precursor is anatase TiO2, using rutile TiO2 leads to forming titanate nanotubes. As a result, ATNTs produced directly without calcination have excellent photocatalytic CO2 reduction than titanate nanotubes and ATNTs prepared by titanate calcination.
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Affiliation(s)
- Khaled Alkanad
- Department
of Studies in Physics, University of Mysore, Manasagangotri, Mysuru570 006, India
| | - Abdo Hezam
- Leibniz
Institute for Catalysis at the University of Rostock, 18059Rostock, Germany
| | - Nabil Al-Zaqri
- Department
of Chemistry, College of Science, King Saud
University, PO Box 2455, Riyadh11451, Saudi Arabia
| | - Mohammed Abdullah Bajiri
- Department
of Studies and Research in Industrial Chemistry, School of Chemical
Sciences, Kuvempu University, Shankaraghatta577 451, India
| | - Gubran Alnaggar
- Department
of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru570006, India
| | - Qasem Ahmed Drmosh
- Interdisciplinary
Research Center for Hydrogen and Energy Storage, King Fahd University of Petroleum and Minerals, Dhahran31261, Saudi Arabia
| | - Hanadi A. Almukhlifi
- Department
of Chemistry, Faculty of Science, University
of Tabuk, P.O. Box 741, Tabuk47512, Saudi Arabia
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Alnaggar G, Alkanad K, G. C. SS, Bajiri MA, Drmosh QAQ, Krishnappagowda LN, Ananda S. Rational design of 2D TiO2-MoO3 Step-scheme heterostructure for boosted photocatalytic overall water splitting. NEW J CHEM 2022. [DOI: 10.1039/d2nj00173j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Designing of step-scheme (S-scheme) heterostructure photocatalyst is a promising strategy for the high utilization of photogenerated charge carriers. Herein, a novel S-scheme two-dimensional (2D) TiO2-MoO3 heterojunction photocatalyst is fabricated by...
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Channa Basappa V, Hamse Kameshwar V, Kumara K, Achutha DK, Neratur Krishnappagowda L, Kariyappa AK. Design and synthesis of coumarin-triazole hybrids: biocompatible anti-diabetic agents, in silico molecular docking and ADME screening. Heliyon 2020; 6:e05290. [PMID: 33102875 PMCID: PMC7575805 DOI: 10.1016/j.heliyon.2020.e05290] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/26/2020] [Accepted: 10/14/2020] [Indexed: 11/27/2022] Open
Abstract
The current study demonstrates the synthesis of coumarin-triazole hybrids 8 (a-e) in four steps starting from substituted salicylaldehyde 1 (a-e), and diethyl malonate 2. The spectroscopic studies provide the structure proofs of the new compounds, and the molecular structure of an intermediate 3a by crystallographic studies. The crystal structure analysis revealed the C–H...O, C–H... π, C–O...π and π...π molecular interactions. Further, the intermolecular interactions were quantified using Hirshfeld surface analysis and the DFT method B3LYP functional with 6–311++ G (d,p) basis set was employed to optimize the molecular geometry. The synthesized new coumarin-triazole hybrids, 8 (a–e) were screened for their α-amylase inhibitory potentials, and the results suggest that amongst the series, compounds 8c, and 8e show the promising inhibition of the enzyme, and might act as lead molecules for anti-diabetic activities. To understand the mode of action in silico molecular docking and ADME screening were performed.
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Affiliation(s)
| | - Vivek Hamse Kameshwar
- Department of Biotechnology, Faculty of Natural Sciences, Adichunchanagiri University-Centre for Research and Innovation, Adichunchanagiri University B.G Nagara, Mandya, India
| | - Karthik Kumara
- Department of Studies in Physics, University of Mysore, Mysuru, India.,Department of Physics, School of Sciences, Jain University (Deemed to be University), Bengaluru, India
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Kar S, Ramamoorthy G, Mitra K, Shivalingegowda N, Mahesha, Mavileti SK, Neratur Krishnappagowda L, Doble M, Golakoti NR. Synthesis of novel spirobibenzopyrans as potent anticancer leads inducing apoptosis in HeLa cells. Bioorg Med Chem Lett 2020; 30:127199. [PMID: 32331934 DOI: 10.1016/j.bmcl.2020.127199] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 04/12/2020] [Accepted: 04/14/2020] [Indexed: 12/13/2022]
Abstract
Spirobibenzopyrans are an unexplored class of therapeutics. We report the anticancer activity of novel spirobibenzopyrans, synthesized by a one-pot reaction and extensively characterized. Structure of one of the spirobibenzopyran has been determined by the single crystal XRD technique. The in vitro anticancer activity of these derivatives across the NCI 60-cell line panel was evaluated and for the first time their mechanism of action against HeLa cells was probed via cell morphology analysis and cell cycle analysis. They were determined to be apoptosis inducers with cell cycle arrest in G0/G1 and S phase suggesting CDK-4 protein inhibition and the inhibition of DNA replication. The DNA inhibition was studied and confirmed using the alkaline comet assay for the compound CHX-4MO-SAL showing S phase inhibition. Further, conformity with the in silico Lipinski's score signify the potential of spirobibenzopyrans as anticancer leads.
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Affiliation(s)
- Swayamsiddha Kar
- Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Andhra Pradesh 515134, India
| | - Gayathri Ramamoorthy
- Bioengineering and Drug Design Lab, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology, Madras, Tamil Nadu 600036, India
| | - Kartik Mitra
- Bioengineering and Drug Design Lab, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology, Madras, Tamil Nadu 600036, India
| | - Naveen Shivalingegowda
- Department of Physics, Faculty of Engineering & Technology, Jain University, Bangalore 562 112, India
| | - Mahesha
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysuru 570 006, India
| | - Sai Kiran Mavileti
- Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Andhra Pradesh 515134, India
| | | | - Mukesh Doble
- Bioengineering and Drug Design Lab, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology, Madras, Tamil Nadu 600036, India.
| | - Nageswara Rao Golakoti
- Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Andhra Pradesh 515134, India.
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Askari B, Rudbari HA, Valente A, Bruno G, Micale N, Shivalingegowda N, Krishnappagowda LN. Synthesis, Characterization and Anticancer Studies of Rh(I), Rh(III), Pd(II) and Pt(II) Complexes Bearing A Dithiooxamide Ligand. ChemistrySelect 2020. [DOI: 10.1002/slct.201903939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Banafshe Askari
- Department of Chemistry University of Isfahan Isfahan 81746-73441 Iran
| | | | - Andreia Valente
- Centro de Química Estrutural Faculdade de Ciências da Universidade de Lisboa, Campo Grande 1749-016 Lisboa Portugal
| | - Giuseppe Bruno
- Department of Chemical Biological, Pharmaceutical and Environmental Sciences University of Messina, Viale Ferdinando Stagno D'Alcontres 31 I-98166 Messina Italy
| | - Nicola Micale
- Department of Chemical Biological, Pharmaceutical and Environmental Sciences University of Messina, Viale Ferdinando Stagno D'Alcontres 31 I-98166 Messina Italy
| | - Naveen Shivalingegowda
- Department of Physics, School of Engineering & Technology Jain University Bangalore 562 112 India
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Kar S, Shivalingegowda N, Krishnappagowda LN, Golakoti NR. SiCl4mediated one-pot synthesis of novel spirobibenzopyrans as potent anticancer agents. NEW J CHEM 2019. [DOI: 10.1039/c8nj06444j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study is the first report on the anticancer activity of spirobibenzopyrans, an unexplored class of therapeutic agents.
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Affiliation(s)
- Swayamsiddha Kar
- Department of Chemistry
- Sri Sathya Sai Institute of Higher Learning
- Prasanthi Nilayam
- India
| | - Naveen Shivalingegowda
- Department of Physics
- School of Engineering & Technology
- Jain University
- Bangalore 562 112
- India
| | | | - Nageswara Rao Golakoti
- Department of Chemistry
- Sri Sathya Sai Institute of Higher Learning
- Prasanthi Nilayam
- India
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Manikandan TS, Ramesh R, Shivalingegowda N, Krishnappagowda LN. Direct Aerobic Strategy for Synthesis of Imines via Alcohols and Amines Promoted by Ruthenium(II) (η6
-p
-cymene) Complexes. ChemistrySelect 2018. [DOI: 10.1002/slct.201800083] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Thimma Sambamoorthy Manikandan
- Centre for Organometallic Chemistry; School of Chemistry; Bharathidasan University; Tiruchirappalli - 620 024, Tamilnadu India
| | - Rengan Ramesh
- Centre for Organometallic Chemistry; School of Chemistry; Bharathidasan University; Tiruchirappalli - 620 024, Tamilnadu India
| | - Naveen Shivalingegowda
- Department of Basic Sciences; School of Engineering & Technology; Jain University; Bangaluru - 562 112 India
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Lokeshwari DM, Achutha DK, Srinivasan B, Shivalingegowda N, Krishnappagowda LN, Kariyappa AK. Synthesis of novel 2-pyrazoline analogues with potent anti-inflammatory effect mediated by inhibition of phospholipase A2: Crystallographic, in silico docking and QSAR analysis. Bioorg Med Chem Lett 2017; 27:3806-3811. [DOI: 10.1016/j.bmcl.2017.06.063] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 05/31/2017] [Accepted: 06/23/2017] [Indexed: 11/27/2022]
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