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MnO2 Doped with Ag Nanoparticles and Their Applications in Antimicrobial and Photocatalytic Reactions. Catalysts 2023. [DOI: 10.3390/catal13020397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
A wide range of nanoparticles have been produced for photocatalysis applications. Nonetheless, degrading organic dyes requires nanoparticles that are efficient and excellent. As a photocatalyst, pure manganese oxide (MnO2) was prepared via a sol–gel method using silver (Ag) nanoparticles of transition metal oxide. In addition to X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX), the crystal structure and elemental composition were analysed. According to XRD data, the transition metal of MnO2 oxide is highly pure and has a small crystallite size. The presence of functional groups was confirmed and clarified using Fourier-transform infrared spectra (FTIR). By irradiating the transition pure and doped MnO2 photocatalysts with visible light, the UV-vis, μ-Raman, and surface areas were determined. As a result, of using the photocatalysts with aqueous methylene blue (MB) solutions under visible light irradiation, the MnO2 doped with Ag nanoparticles demonstrated high degradation efficiencies and were utilised to establish heterogeneous photocatalysis dominance. In this paper, we demonstrate that the photocatalytic efficiency of transition metal oxides is exclusively determined by the particle size and surface area of nano-sized materials. Due to their high surface charge ratio and different surface orientations, have the highest photocatalytic efficiency. Generally, MnO2 doped with Ag nanoparticles is resistant to bacteria of both Gram-positive and Gram-negative types (B. sublittus and Escherichia coli). There is still a need for more research to be performed on reducing the toxicity of metal and metal oxide nanoparticles so that they can be used as an effective alternative to antibiotics and disinfectants, particularly for biomedical applications.
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Kumar KS, Robert AR, Kerru N, Maddila S. A novel, swift, and effective green synthesis of morpholino-pyridine analogues in microwave irradiation conditions. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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3
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Maddila S, Kerru N, Jonnalagadda SB. Recent Progress in the Multicomponent Synthesis of Pyran Derivatives by Sustainable Catalysts under Green Conditions. Molecules 2022; 27:6347. [PMID: 36234888 PMCID: PMC9571218 DOI: 10.3390/molecules27196347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/20/2022] [Accepted: 09/22/2022] [Indexed: 12/03/2022] Open
Abstract
Pyrans are one of the most significant skeletons of oxygen-containing heterocyclic molecules, which exhibit a broad spectrum of medicinal applications and are constituents of diverse natural product analogues. Various biological applications of these pyran analogues contributed to the growth advances in these oxygen-containing molecules. Green one-pot methodologies for synthesising these heterocyclic molecules have received significant attention. This review focuses on the recent developments in synthesising pyran ring derivatives using reusable catalysts and emphasises the multicomponent reaction strategies using green protocols. The advantages of the catalysts in terms of yields, reaction conditions, and recyclability are discussed.
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Affiliation(s)
- Suresh Maddila
- Department of Chemistry, GITAM School of Sciences, GITAM University, Visakhapatnam 530045, Andhra Pradesh, India
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban 4000, South Africa
| | - Nagaraju Kerru
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban 4000, South Africa
- Department of Chemistry, GITAM School of Science, GITAM University, Bengaluru Campus, Bengaluru 561203, Karnataka, India
| | - Sreekantha Babu Jonnalagadda
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban 4000, South Africa
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An efficient and sustainable synthesis of morpholino-1,4-dihydropyridine-2,3-dicarboxylates using recyclable SeO2/HAp catalyst. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Maddila S, Devi L, Muralidhar P, Nagaraju K, Jonnalagadda SB. A facile and environmental-friendly protocol for the synthesis of methyleneisoxazole-5(4H)-ones catalyzed by CeO2/TiO2 under ultrasonic irradiation. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Agarwal S, Sethiya A, Soni J, Sahiba N, Teli P. An Overview of Recent Advances in the Catalytic Synthesis of Substituted Pyrans. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shikha Agarwal
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur
| | - Ayushi Sethiya
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur
| | - Jay Soni
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur
| | - Nusrat Sahiba
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur
| | - Pankaj Teli
- Synthetic Organic Chemistry Laboratory, Department of Chemistry, MLSU Udaipur
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Sonali Anantha IS, Kerru N, Maddila S, Jonnalagadda SB. Recent Progresses in the Multicomponent Synthesis of Dihydropyridines by Applying Sustainable Catalysts Under Green Conditions. Front Chem 2021; 9:800236. [PMID: 34993177 PMCID: PMC8724676 DOI: 10.3389/fchem.2021.800236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 11/19/2021] [Indexed: 11/27/2022] Open
Abstract
The synthesis of dihydropyridines, valuable molecules with diverse therapeutic properties, using eco-friendly heterogeneous catalysts as a green alternative received significant consideration. By selecting appropriate precursors, these compounds can be readily modified to induce the desired properties in the target product. This review focused on synthesising diverse dihydropyridine derivatives in single-pot reactions using magnetic, silica, and zirconium-based heterogeneous catalytic systems. The monograph describes preparation techniques for various catalyst materials in detail. It covers facile and benign magnetic, silica, zirconium-based, and ionic liquid catalysts, exhibiting significant efficacy and consistently facilitating excellent yields in short reaction times and in a cost-effective way. Most of the designated protocols employ Hantzsch reactions involving substituted aldehydes, active methylene compounds, and ammonium acetate. These reactions presumably follow Knoevenagel condensation followed by Michael addition and intra-molecular cyclisation. The multicomponent one-pot protocols using green catalysts and solvents have admirably increased the product selectivity and yields while minimising the reaction time. These sustainable catalyst materials retain their viability for several cycles reducing the expenditure are eco-friendly.
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Affiliation(s)
| | - Nagaraju Kerru
- Department of Chemistry, GITAM School of Science, GITAM University, Bengaluru, India
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, South Africa
| | - Suresh Maddila
- Department of Chemistry, GITAM Institute of Sciences, GITAM University, Visakhapatnam, India
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, South Africa
| | - Sreekantha B. Jonnalagadda
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, South Africa
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Madhavi C, Ganja H, Kerru N, Maddila S, Jonnalagadda SB. Synthesis of a sustainable heterogeneous catalyst, titanium dioxide‐loaded hydroxyapatite for functionalised chromen‐dihydropyridines under green conditions. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Challa Madhavi
- Department of Chemistry, GITAM Institute of Sciences GITAM University Visakhapatnam India
| | - Himavathi Ganja
- Department of Chemistry, GITAM Institute of Sciences GITAM University Visakhapatnam India
| | - Nagaraju Kerru
- Department of Chemistry, GITAM School of Science GITAM University, Bengaluru Campus Doddaballapura India
| | - Suresh Maddila
- Department of Chemistry, GITAM Institute of Sciences GITAM University Visakhapatnam India
- School of Chemistry and Physics University of KwaZulu‐Natal, Westville Campus Durban South Africa
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Goswami M, Dutta A, Paul P, Nongkhlaw R. Recent Developments on Catalyst‐Free, Visible‐Light‐Triggered Synthesis of Heterocyclic Scaffolds and Their Mechanistic Study. ChemistrySelect 2021. [DOI: 10.1002/slct.202102696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Munmee Goswami
- Centre for Advanced Studies in Chemistry Department of Chemistry North-Eastern Hill University Shillong 793022 INDIA
| | - Arup Dutta
- Centre for Advanced Studies in Chemistry Department of Chemistry North-Eastern Hill University Shillong 793022 INDIA
| | - Pooja Paul
- Centre for Advanced Studies in Chemistry Department of Chemistry North-Eastern Hill University Shillong 793022 INDIA
| | - Rishanlang Nongkhlaw
- Centre for Advanced Studies in Chemistry Department of Chemistry North-Eastern Hill University Shillong 793022 INDIA
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Ganta RK, Kerru N, Maddila S, Jonnalagadda SB. Advances in Pyranopyrazole Scaffolds' Syntheses Using Sustainable Catalysts-A Review. Molecules 2021; 26:3270. [PMID: 34071629 PMCID: PMC8199150 DOI: 10.3390/molecules26113270] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/23/2021] [Accepted: 05/26/2021] [Indexed: 11/17/2022] Open
Abstract
Heterogeneous catalysis plays a crucial role in many chemical processes, including advanced organic preparations and the design and synthesis of new organic moieties. Efficient and sustainable catalysts are vital to ecological and fiscal viability. This is why green multicomponent reaction (MCR) approaches have gained prominence. Owing to a broad range of pharmacological applications, pyranopyrazole syntheses (through the one-pot strategy, employing sustainable heterogeneous catalysts) have received immense attention. This review aimed to emphasise recent developments in synthesising nitrogen-based fused heterocyclic ring frameworks, exploring diverse recyclable catalysts. The article focused on the synthetic protocols used between 2010 and 2020 using different single, bi- and tri-metallic materials and nanocomposites as reusable catalysts. This review designated the catalysts' efficacy and activity in product yields, reaction time, and reusability. The MCR green methodologies (in conjunction with recyclable catalyst materials) proved eco-friendly and ideal, with a broad scope that could feasibly lead to advancements in organic synthesis.
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Affiliation(s)
- Ravi Kumar Ganta
- Department of Chemistry, GITAM Institute of Sciences, GITAM University, Visakhapatnam 530045, India; (R.K.G.); (S.M.)
| | - Nagaraju Kerru
- Department of Chemistry, GITAM School of Science, Bengaluru Campus, GITAM University, Karnataka 561203, India;
- School of Chemistry & Physics, Westville Campus, University of KwaZulu-Natal, Chiltern Hills, Durban 4000, South Africa
| | - Suresh Maddila
- Department of Chemistry, GITAM Institute of Sciences, GITAM University, Visakhapatnam 530045, India; (R.K.G.); (S.M.)
- School of Chemistry & Physics, Westville Campus, University of KwaZulu-Natal, Chiltern Hills, Durban 4000, South Africa
| | - Sreekantha B. Jonnalagadda
- School of Chemistry & Physics, Westville Campus, University of KwaZulu-Natal, Chiltern Hills, Durban 4000, South Africa
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Kerru N, Gummidi L, Maddila S, Jonnalagadda SB. A Review of Recent Advances in the Green Synthesis of Azole- and Pyran-based Fused Heterocycles Using MCRs and Sustainable Catalysts. CURR ORG CHEM 2021. [DOI: 10.2174/1385272824999201020204620] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nitrogen, oxygen and sulfur-containing fused heterocycles are of great importance
because of their exciting and diverse biological activities. The construction of the carbonnitrogen
and carbon-oxygen through a multicomponent reaction approach by using ecofriendly
reusable heterogeneous catalysts are of significant importance as it opens avenues for
the introduction of nitrogen and oxygen in organic molecules. Thus, green methodologies
have gained particular significance in this field; today, green chemistry is considered a tool
for introducing sustainable concepts at the fundamental level. This review emphasizes and
discusses the current progress on the applications of eco-friendly, recyclable heterogeneous
catalysts for the synthesis of different heterocyclic fused systems and their green protocols.
We paid particular attention to the specific integration of carbon-nitrogen, and carbon-oxygen
bond-forming fused heterocycles by a one-pot approach by evaluating the literature between 2012 and the middle of
2020. The efficiency of the catalyst is assessed in terms of reaction time, yield and possible reusability. The MCR and
heterogeneous catalyst strategies have demonstrated broader scope, economical and viability for the green and sustainable
processes in the field of synthetic organic chemistry.
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Affiliation(s)
- Nagaraju Kerru
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000, South Africa
| | - Lalitha Gummidi
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000,, South Africa
| | - Suresh Maddila
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000,, South Africa
| | - Sreekantha B. Jonnalagadda
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000,, South Africa
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12
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Alorku K, Manoj M, Yuan A. A plant-mediated synthesis of nanostructured hydroxyapatite for biomedical applications: a review. RSC Adv 2020; 10:40923-40939. [PMID: 35519223 PMCID: PMC9057773 DOI: 10.1039/d0ra08529d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 10/23/2020] [Indexed: 12/18/2022] Open
Abstract
The engineering of calcium-based phosphate materials at the nanoscale gains several unique properties compared to the bulky state. The effort to scale down, e.g., from bulky state to nanoscale in order to control the morphology and improve structural properties requires the use of varying reagents that can be detrimental to the environment. A typical example of these materials is hydroxyapatite (HAp), one of the well-known calcium phosphate materials, which has a close resemblance to human bone tissue. HAp has valuable applications in catalysis, drug delivery, bone and dental implant formation, and adsorption. Hydroxyapatite-based nanomaterials synthesized through conventional routes make use of reagents that are not environmental friendly and are very costly. Since the current research trends are geared towards producing/synthesizing nanomaterials through an eco-friendly approach, there is the need to consider the techniques and reagents involved in the synthesis of HAp. This review touches on the possible replacement of such synthetic chemical reagents, synthesis routes, and toxic capping agents with plant extracts for synthesizing HAp-based nanomaterials for multi-functional applications. The influence of biomolecules from plants on synthesized HAps and the attainable mechanism during these green approaches are discussed. Viable future modifications of the methods used to obtain extracts from plants are also studied.
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Affiliation(s)
- Kingdom Alorku
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology Zhenjiang 212003 Jiangsu Province PR China +86-511-85639001
| | - M Manoj
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology Zhenjiang 212003 Jiangsu Province PR China +86-511-85639001
| | - Aihua Yuan
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology Zhenjiang 212003 Jiangsu Province PR China +86-511-85639001
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Harikrishna S, Robert AR, Ganja H, Maddila S, Jonnalagadda SB. A green, efficient and recoverable CeO
2
/MWCNT nanocomposite catalyzed click synthesis of pyridine‐3‐carboxamides. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5796] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Singamsetty Harikrishna
- Department of Chemistry, GITAM Institute of SciencesGITAM University Visakhapatnam Andhra Pradesh India
| | - Alice R. Robert
- Department of Chemistry, GITAM Institute of SciencesGITAM University Visakhapatnam Andhra Pradesh India
| | - Himavathi Ganja
- Department of Chemistry, GITAM Institute of SciencesGITAM University Visakhapatnam Andhra Pradesh India
| | - Suresh Maddila
- Department of Chemistry, GITAM Institute of SciencesGITAM University Visakhapatnam Andhra Pradesh India
- School of Chemistry & PhysicsUniversity of KwaZulu‐Natal, Westville Campus Durban Chiltern Hills 4000 South Africa
| | - Sreekantha B. Jonnalagadda
- School of Chemistry & PhysicsUniversity of KwaZulu‐Natal, Westville Campus Durban Chiltern Hills 4000 South Africa
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Ganja H, Robert AR, Lavanya P, Chinnam S, Maddila S, Jonnalagadda SB. Y2O3/HAp, a sustainable catalyst for novel synthesis of furo[3,4-b]chromenes derivatives via green strategy. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.107807] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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