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Filho ACD, de Jesus Soares J, Carriço MRS, Viçozi GP, Flores WH, Denardin CC, Roehrs R, Denardin ELG. Green synthesis silver nanoparticles Bougainvillea glabra Choisy/LED light with high catalytic activity in the removal of methylene blue aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:36244-36258. [PMID: 36547835 DOI: 10.1007/s11356-022-24633-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
In this study, we evaluated, in a pioneering way, the influence of wavelengths from the decomposition of white light on the production and physicochemical properties of silver nanoparticles (AgNPs). Bearing in mind a process of green synthesis, an extract of the bracts of Bougainvillea glabra Choisy (BgC) was used, a species native to tropical and subtropical regions and frequently used in ornamentation, possessing in its photochemical composition, biomolecules capable of acting as reducing agents for convert Ag+ to Ag0. We used light-emitting diodes (LED) to obtain the desired wavelengths (violet, blue, green, yellow, orange, and red) in the test called rainbow, and we evaluated the obtaining of AgNPs compared to white LED light, nature, and absence of light. In the rainbow assay, we obtained a gradual increase in the intensity of the plasmonic band resonance from the red wavelength (0.124 ± 0.067 a.u.) to violet (0.680 ± 0.199 a.u.), indicating a higher reaction yield in obtaining AgNPs. Smaller hydrodynamic sizes (approximately 150 nm) at more energetic wavelengths (violet, blue, and green) about less energetic wavelengths (yellow, orange, and red) (approximately 400 nm) were obtained. Analysis by SEM microscopy, FTIR spectroscopy, and X-ray diffraction indicates the presence of silver nanoparticles in all LED colors used together with white LED light and Laboratory light (natural light). Due to the high environmental demand to remove pollutants from water sources, including textile dyes, we applied AgNPs/BgC to remove methylene blue (MB) dye from an aqueous solution. A minimum removal percentage greater than 65%, with emphasis on formulations synthesized by the colors of violet LED (84.27 ± 2.65%) and orange LED (85.91 ± 1.95%), was obtained.
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Affiliation(s)
- Augusto Cezar Dotta Filho
- Laboratório de Estudos Físico-Químicos E Produtos Naturais (LEFQPN), Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil
| | - Jefferson de Jesus Soares
- Laboratório de Estudos Físico-Químicos E Produtos Naturais (LEFQPN), Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil
| | - Murilo Ricardo Sigal Carriço
- Laboratório de Análises Químicas Ambientais E Toxicológicas (LAQAT), Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil
| | - Gabriel Pedroso Viçozi
- Universidade Federal Do Pampa, Campus Uruguaiana, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil
| | | | - Cristiane Casagrande Denardin
- Grupo de Pesquisa Em Bioquímica E Toxicologia Em Compostos Bioativos, Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil
| | - Rafael Roehrs
- Laboratório de Análises Químicas Ambientais E Toxicológicas (LAQAT), Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil
| | - Elton Luís Gasparotto Denardin
- Laboratório de Estudos Físico-Químicos E Produtos Naturais (LEFQPN), Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil.
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Menzel JP, Noble BB, Blinco JP, Barner-Kowollik C. Predicting wavelength-dependent photochemical reactivity and selectivity. Nat Commun 2021; 12:1691. [PMID: 33727558 PMCID: PMC7966369 DOI: 10.1038/s41467-021-21797-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 02/09/2021] [Indexed: 02/06/2023] Open
Abstract
Predicting the conversion and selectivity of a photochemical experiment is a conceptually different challenge compared to thermally induced reactivity. Photochemical transformations do not currently have the same level of generalized analytical treatment due to the nature of light interaction with a photoreactive substrate. Herein, we bridge this critical gap by introducing a framework for the quantitative prediction of the time-dependent progress of photoreactions via common LEDs. A wavelength and concentration dependent reaction quantum yield map of a model photoligation, i.e., the reaction of thioether o-methylbenzaldehydes via o-quinodimethanes with N-ethylmaleimide, is initially determined with a tunable laser system. Combined with experimental parameters, the data are employed to predict LED-light induced conversion through a wavelength-resolved numerical simulation. The model is validated with experiments at varied wavelengths. Importantly, a second algorithm allows the assessment of competing photoreactions and enables the facile design of λ-orthogonal ligation systems based on substituted o-methylbenzaldehydes.
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Affiliation(s)
- Jan P Menzel
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, QLD, Australia
- Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD, Australia
- Centre for Data Science, Queensland University of Technology (QUT), Brisbane, QLD, Australia
| | - Benjamin B Noble
- School of Engineering, College of Science, Engineering and Health, RMIT University, Melbourne, VIC, Australia
| | - James P Blinco
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, QLD, Australia.
- Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD, Australia.
| | - Christopher Barner-Kowollik
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, QLD, Australia.
- Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD, Australia.
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Sampedro D. Natural and Artificial Photoprotective Agents. Molecules 2021; 26:molecules26041189. [PMID: 33672187 PMCID: PMC7926296 DOI: 10.3390/molecules26041189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 02/22/2021] [Indexed: 11/16/2022] Open
Affiliation(s)
- Diego Sampedro
- Departamento de Química, Universidad de La Rioja, Centro de Investigación en Síntesis Química (CISQ), Madre de Dios, 53, 26006 Logroño, Spain
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Eivgi O, Phatake RS, Nechmad NB, Lemcoff NG. Light-Activated Olefin Metathesis: Catalyst Development, Synthesis, and Applications. Acc Chem Res 2020; 53:2456-2471. [PMID: 32990427 PMCID: PMC7584343 DOI: 10.1021/acs.accounts.0c00495] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Indexed: 12/30/2022]
Abstract
The most important means for tuning and improving a catalyst's properties is the delicate exchange of the ligand shell around the central metal atom. Perhaps for no other organometallic-catalyzed reaction is this statement more valid than for ruthenium-based olefin metathesis. Indeed, even the simple exchange of an oxygen atom for a sulfur atom in a chelated ruthenium benzylidene about a decade ago resulted in the development of extremely stable, photoactive catalysts. This Account presents our perspective on the development of dormant olefin metathesis catalysts that can be activated by external stimuli and, more specifically, the use of light as an attractive inducing agent.The insight gained from a deeper understanding of the properties of cis-dichlororuthenium benzylidenes opened the doorway for the systematic development of new and efficient light-activated olefin metathesis catalysts and catalytic chromatic-orthogonal synthetic schemes. Following this, ways to disrupt the ligand-to-metal bond to accelerate the isomerization process that produced the active precatalyst were actively pursued. Thus, we summarize herein the original thermal activation experiments and how they brought about the discoveries of photoactivation in the sulfur-chelated benzylidene family of catalysts. The specific wavelengths of light that were used to dissociate the sulfur-ruthenium bond allowed us to develop noncommutative catalytic chromatic-orthogonal processes and to combine other photochemical reactions with photoinduced olefin metathesis, including using external light-absorbing molecules as "sunscreens" to achieve novel selectivities. Alteration of the ligand sphere, including modifications of the N-heterocyclic carbene (NHC) ligand and the introduction of cyclic alkyl amino carbene (CAAC) ligands, produced more efficient light-induced activity and special chemical selectivity. The use of electron-rich sulfoxides and, more prominently, phosphites as the agents that induce latency widened the spectrum of light-induced olefin metathesis reactions even further by expanding the colors of light that may now be used to activate the catalysts, which can be used in applications such as stereolithography and 3D printing of tough metathesis-derived polymers.
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Affiliation(s)
- Or Eivgi
- Department
of Chemistry, Ben-Gurion University of the
Negev, Beer-Sheva 84105, Israel
| | - Ravindra S. Phatake
- Department
of Chemistry, Ben-Gurion University of the
Negev, Beer-Sheva 84105, Israel
| | - Noy B. Nechmad
- Department
of Chemistry, Ben-Gurion University of the
Negev, Beer-Sheva 84105, Israel
| | - N. Gabriel Lemcoff
- Department
of Chemistry, Ben-Gurion University of the
Negev, Beer-Sheva 84105, Israel
- Ilse
Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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