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The synergistic effect of electron lone pairs and aromaticity on the binding affinity towards metal surfaces. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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2
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Hassan ZU, Abbas Z, Bakht K, Ayoub MH, Ahmad S, Khan AM, Farooq U, Khan MS, Shaikh AJ. Dynamic light scattering and zeta-potential as a tool for understanding the mechanism of pesticides binding toward individual components of transition metal nanoparticles and graphene oxide hybrids. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:932-947. [PMID: 36469565 DOI: 10.1080/03601234.2022.2147348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Pesticides present in their commercial formulations are studied for their preferable binding toward carbon-based graphene oxide (GO) or transition metal nanoparticles (Fe, Co, Ni, and Cu), present as hybrids. This simple study also reveals the mechanism of interaction of few selected different classes of pesticides, namely, λ-cyhalothrin, imidacloprid, and metsulfuron-methyl toward these hybrids. Individually, to study this comparative binding when hybrids are not used, the understanding of preferred binding toward any of these selected compounds could be challenging, costly, and time-consuming. Dynamic light scattering (DLS) is used to study the changes observed for hydrodynamic radius and zeta potential for the stability of the resulting products. This simple method can also be extended to identify the binding mechanism for other diverse set of combinations. These studies are supported by binding of GO with nanoparticles in batch adsorption and the best fit using Langmuir and Freundlich isotherms is presented. Moreover, pesticide adsorption toward GO-nanoparticle composites is also evidenced.
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Affiliation(s)
- Zia Ul Hassan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Zameer Abbas
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Khush Bakht
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | | | - Shehryar Ahmad
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Asad Muhammad Khan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Umar Farooq
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Muhammad Saqib Khan
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad, Pakistan
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3
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Ahmad S, Ayoub MH, Khan AM, Waseem A, Yasir M, Khan MS, Bajwa TM, Shaikh AJ. Diverse comparative studies for preferential binding of graphene oxide and transition metal oxide nanoparticles. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129057] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Polivanovskaia DA, Birin KP, Averin AA, Gorbunova YG, Tsivadze AY. Photocatalytic activity of pyrazinoporphyrin in the presence of gold nanoparticles and nanoclusters. Russ Chem Bull 2022. [DOI: 10.1007/s11172-021-3321-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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5
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Shinohara A, Shao G, Nakanishi T, Shinmori H. Porphyrin Photoabsorption and Fluorescence Variation with Adsorptive Loading on Gold Nanoparticles. Front Chem 2021; 9:777041. [PMID: 34888295 PMCID: PMC8650619 DOI: 10.3389/fchem.2021.777041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 10/25/2021] [Indexed: 11/21/2022] Open
Abstract
Here, we report the photophysical structure–property relationship of porphyrins adsorbed on gold nanoparticles. The number of porphyrin–alkanethiolate adsorbates per particle was adjusted by a post-synthetic thiol/thiolate exchange reaction on 1-dodecanethiolate–protected gold nanoparticles. Even with a low loading level of adsorbates (<10% of all thiolate sites on gold nanoparticles), the shoulder absorption at the Soret band was intensified, indicating the formation of aggregates of porphyrin adsorbates on the nanoparticles. Steady-state fluorescence quantum yields could be adjusted by the bulkiness of substituents at the meso-positions of the porphyrin or the methylene linker chain length, regardless of the porphyrin loading level and the nanoparticle diameter.
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Affiliation(s)
- Akira Shinohara
- School of Chemistry, Sun Yat-sen University, Guangzhou, China.,Faculty of Life and Environmental Science, Graduate Faculty of Interdisciplinary Research, Department of Biotechnology, University of Yamanashi, Kofu, Japan.,International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan
| | - Guang Shao
- School of Chemistry, Sun Yat-sen University, Guangzhou, China
| | - Takashi Nakanishi
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan
| | - Hideyuki Shinmori
- Faculty of Life and Environmental Science, Graduate Faculty of Interdisciplinary Research, Department of Biotechnology, University of Yamanashi, Kofu, Japan
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6
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Pallikkara A, Sebastian D, Ramakrishnan K. An Investigation on the Effect of Extended Conjugation on the Photophysical Properties of Graphene Quantum Dot‐Porphyrin Dyads. ChemistrySelect 2021. [DOI: 10.1002/slct.202103199] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Athira Pallikkara
- Department of Applied Chemistry Cochin University of Science and Technology Kochi 682022 Kerala India
| | - Deepa Sebastian
- Department of Applied Chemistry Cochin University of Science and Technology Kochi 682022 Kerala India
| | - Kala Ramakrishnan
- Department of Applied Chemistry Cochin University of Science and Technology Kochi 682022 Kerala India
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7
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Binding efficiency of functional groups towards noble metal surfaces using graphene oxide – metal nanoparticle hybrids. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125858] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Morozov VN, Kolyvanova MA, Dement'eva OV, Rudoy VM, Kuzmin VA. Comparison of quenching efficacy of SYBR Green I and PicoGreen fluorescence by ultrasmall gold nanoparticles in isotropic and liquid-crystalline DNA systems. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114751] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Sahu K, Mondal S, Patra B, Pain T, Patra SK, Dosche C, Kar S. Regioselective thiocyanation of corroles and the synthesis of gold nanoparticle-corrole assemblies. NANOSCALE ADVANCES 2020; 2:166-170. [PMID: 36134003 PMCID: PMC9419656 DOI: 10.1039/c9na00671k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 11/20/2019] [Indexed: 06/15/2023]
Abstract
Herein we demonstrate a synthetic protocol for the regioselective thiocyanation of corroles. To the best of our knowledge, thiocyanato appended corrole has never been reported earlier. The resulting thiocyanato appended corrole turned out to be a good corrole based precursor for the facile synthesis of thiol protected gold nanoparticles (Au NPs). The ligand system acts as a good bidentate framework and passivates the gold surface. A strong electronic interaction between the corrole and the gold nanoparticles is manifested by their unique photo physical properties and it also confirms that the binding through β-substitutions has a more pronounced effect even though the corrole rings are face-off to the gold surface.
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Affiliation(s)
- Kasturi Sahu
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar Khordha 752050 India
- Homi Bhabha National Institute, Training School Complex Anushakti Nagar Mumbai 400094 India
| | - Sruti Mondal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar Khordha 752050 India
- Homi Bhabha National Institute, Training School Complex Anushakti Nagar Mumbai 400094 India
| | - Bratati Patra
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar Khordha 752050 India
- Homi Bhabha National Institute, Training School Complex Anushakti Nagar Mumbai 400094 India
| | - Tanmoy Pain
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar Khordha 752050 India
- Homi Bhabha National Institute, Training School Complex Anushakti Nagar Mumbai 400094 India
| | - Sajal Kumar Patra
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar Khordha 752050 India
- Homi Bhabha National Institute, Training School Complex Anushakti Nagar Mumbai 400094 India
| | - Carsten Dosche
- University of Oldenburg, Institute of Chemistry Carl-von-Ossietzky-St. 9-11 26129 Oldenburg Germany
| | - Sanjib Kar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar Khordha 752050 India
- Homi Bhabha National Institute, Training School Complex Anushakti Nagar Mumbai 400094 India
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10
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Grigore ME, Ion RM, Iancu L, Grigorescu RM. Tailored porphyrin–gold nanoparticles for biomedical applications. J PORPHYR PHTHALOCYA 2019. [DOI: 10.1142/s108842461930012x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this review we present an updated survey of the main synthesis methods of gold nanoparticles (AuNPs) in order to obtain various tailored nanosystems for biomedical imaging. The synthesis approach significantly impacts on the AuNPs properties such as surface chemistry, biocompatibility and cytotoxicity. In recent years, nanomedicine emphasized the development of functionalized AuNPs for biomedical imaging. AuNPs are a good option for used as delivery photosensitizer agents for PDT of cancer. For example, the complex formed from AuNPs functionalized with PEGylate porphyrins presents several advantages in the medical field such as a better use in photodynamic therapy because of high triplet states and singlet oxygen quantum yield efficiency of porphyrin molecules.
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Affiliation(s)
- Madalina E. Grigore
- “Evaluation and Conservation of Cultural Heritage” Research Group, ICECHIM Bucharest, 202 Spl. Independentei, 060021, Romania
| | - Rodica-M. Ion
- “Evaluation and Conservation of Cultural Heritage” Research Group, ICECHIM Bucharest, 202 Spl. Independentei, 060021, Romania
- Doctoral School of Materials Engineering, Valahia University of Targoviste, Aleea Sinaia, No. 13, 130005, Romania
| | - Lorena Iancu
- “Evaluation and Conservation of Cultural Heritage” Research Group, ICECHIM Bucharest, 202 Spl. Independentei, 060021, Romania
- Doctoral School of Materials Engineering, Valahia University of Targoviste, Aleea Sinaia, No. 13, 130005, Romania
| | - Ramona M. Grigorescu
- “Evaluation and Conservation of Cultural Heritage” Research Group, ICECHIM Bucharest, 202 Spl. Independentei, 060021, Romania
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11
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Controlled gene and drug release from a liposomal delivery platform triggered by X-ray radiation. Nat Commun 2018; 9:2713. [PMID: 30006596 PMCID: PMC6045614 DOI: 10.1038/s41467-018-05118-3] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 05/24/2018] [Indexed: 11/08/2022] Open
Abstract
Liposomes have been well established as an effective drug delivery system, due to simplicity of their preparation and unique characteristics. However conventional liposomes are unsuitable for the on-demand content release, which limits their therapeutic utility. Here we report X-ray-triggerable liposomes incorporating gold nanoparticles and photosensitizer verteporfin. The 6 MeV X-ray radiation induces verteporfin to produce singlet oxygen, which destabilises the liposomal membrane and causes the release of cargos from the liposomal cavity. This triggering strategy is demonstrated by the efficiency of gene silencing in vitro and increased effectiveness of chemotherapy in vivo. Our work indicates the feasibility of a combinatorial treatment and possible synergistic effects in the course of standard radiotherapy combined with chemotherapy delivered via X-ray-triggered liposomes. Importantly, our X-ray-mediated liposome release strategy offers prospects for deep tissue photodynamic therapy, by removing its depth limitation. X-ray radiation has excellent tissue penetration depth, making it a useful trigger for deep tissue cancer therapy. Here, the authors design X-ray triggered drug/gene-loaded liposomes by embedding photosensitizers and gold nanoparticles in the liposome bilayer, and demonstrate their efficacy in cancer and gene therapy.
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12
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Bera K, Maiti S, Maity M, Mandal C, Maiti NC. Porphyrin-Gold Nanomaterial for Efficient Drug Delivery to Cancerous Cells. ACS OMEGA 2018; 3:4602-4619. [PMID: 30023896 PMCID: PMC6045359 DOI: 10.1021/acsomega.8b00419] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 04/17/2018] [Indexed: 05/11/2023]
Abstract
With an aim to overcome multidrug resistance (MDR), nontargeted delivery, and drug toxicity, we developed a new nanochemotherapeutic system with tetrasodium salt of meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) armored on gold nanoparticles (TPPS-AuNPs). The nanocarrier is able to be selectively internalized within tumor cells than in normal cells followed by endocytosis and therefore delivers the antitumor drug doxorubicin (DOX) particularly to the nucleus of diseased cells. The embedment of TPPS on the gold nanosurface provides excellent stability and biocompatibility to the nanoparticles. Porphyrin interacts with the gold nanosurface through the coordination interaction between gold and pyrrolic nitrogen atoms of the porphyrin and forms a strong association complex. DOX-loaded nanocomposite (DOX@TPPS-AuNPs) demonstrated enhanced cellular uptake with significantly reduced drug efflux in MDR brain cancer cells, thereby increasing the retention time of the drug within tumor cells. It exhibited about 9 times greater potency for cellular apoptosis via triggered release commenced by acidic pH. DOX has been successfully loaded on the porphyrin-modified gold nanosurface noncovalently with high encapsulation efficacy (∼90%) and tightly associated under normal physiological conditions but capable of releasing ∼81% of drug in a low-pH environment. Subsequently, DOX-loaded TPPS-AuNPs exhibited higher inhibition of cellular metastasis, invasion, and angiogenesis, suggesting that TPPS-modified AuNPs could improve the therapeutic efficacy of the drug molecule. Unlike free DOX, drug-loaded TPPS-AuNPs did not show toxicity toward normal cells. Therefore, higher drug encapsulation efficacy with selective targeting potential and acidic-pH-mediated intracellular release of DOX at the nucleus make TPPS-AuNPs a "magic bullet" for implication in nanomedicine.
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Affiliation(s)
- Kaushik Bera
- Structural
Biology and Bioinformatics Division and Cancer Biology & Inflammatory
Disorder Division, CSIR-Indian Institute
of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata 700032, India
| | - Samarpan Maiti
- Structural
Biology and Bioinformatics Division and Cancer Biology & Inflammatory
Disorder Division, CSIR-Indian Institute
of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata 700032, India
| | - Mritunjoy Maity
- Structural
Biology and Bioinformatics Division and Cancer Biology & Inflammatory
Disorder Division, CSIR-Indian Institute
of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata 700032, India
| | - Chitra Mandal
- Structural
Biology and Bioinformatics Division and Cancer Biology & Inflammatory
Disorder Division, CSIR-Indian Institute
of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata 700032, India
| | - Nakul C. Maiti
- Structural
Biology and Bioinformatics Division and Cancer Biology & Inflammatory
Disorder Division, CSIR-Indian Institute
of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata 700032, India
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13
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Parra GG, Ferreira LP, Gonçalves PJ, Sizova SV, Oleinikov VA, Morozov VN, Kuzmin VA, Borissevitch IE. Stimulation of Cysteine-Coated CdSe/ZnS Quantum Dot Luminescence by meso-Tetrakis (p-sulfonato-phenyl) Porphyrin. NANOSCALE RESEARCH LETTERS 2018; 13:40. [PMID: 29404784 PMCID: PMC5799094 DOI: 10.1186/s11671-018-2449-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 01/20/2018] [Indexed: 06/07/2023]
Abstract
Interaction between porphyrins and quantum dots (QD) via energy and/or charge transfer is usually accompanied by reduction of the QD luminescence intensity and lifetime. However, for CdSe/ZnS-Cys QD water solutions, kept at 276 K during 3 months (aged QD), the significant increase in the luminescence intensity at the addition of meso-tetrakis (p-sulfonato-phenyl) porphyrin (TPPS4) has been observed in this study. Aggregation of QD during the storage provokes reduction in the quantum yield and lifetime of their luminescence. Using steady-state and time-resolved fluorescence techniques, we demonstrated that TPPS4 stimulated disaggregation of aged CdSe/ZnS-Cys QD in aqueous solutions, increasing the quantum yield of their luminescence, which finally reached that of the fresh-prepared QD. Disaggregation takes place due to increase in electrostatic repulsion between QD at their binding with negatively charged porphyrin molecules. Binding of just four porphyrin molecules per single QD was sufficient for total QD disaggregation. The analysis of QD luminescence decay curves demonstrated that disaggregation stronger affected the luminescence related with the electron-hole annihilation in the QD shell. The obtained results demonstrate the way to repair aged QD by adding of some molecules or ions to the solutions, stimulating QD disaggregation and restoring their luminescence characteristics, which could be important for QD biomedical applications, such as bioimaging and fluorescence diagnostics. On the other hand, the disaggregation is important for QD applications in biology and medicine since it reduces the size of the particles facilitating their internalization into living cells across the cell membrane.
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Affiliation(s)
- Gustavo G Parra
- Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, 14040-901, Brazil.
- Present Address: MackGraphe, Mackenzie Presbyterian University, São Paulo, SP, 01302-907, Brazil.
| | - Lucimara P Ferreira
- Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, 14040-901, Brazil
| | - Pablo J Gonçalves
- Instituto de Física, Universidade Federal de Goiás, Caixa Postal 131, Goiânia, GO, 74001-970, Brazil
| | - Svetlana V Sizova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, 16/10 Miklukho-Maklaya str, Moscow, Russia, 117997
| | - Vladimir A Oleinikov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, 16/10 Miklukho-Maklaya str, Moscow, Russia, 117997
| | | | | | - Iouri E Borissevitch
- Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, 14040-901, Brazil
- Instituto de Física, Universidade Federal de Goiás, Caixa Postal 131, Goiânia, GO, 74001-970, Brazil
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14
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Magno LN, Bezerra FC, Freire LES, Guerra RA, Bakuzis AF, Gonçalves PJ. Use of Spectroscopic Techniques for Evaluating the Coupling of Porphyrins on Biocompatible Nanoparticles. A Potential System for Photodynamics, Theranostics, and Nanodrug Delivery Applications. J Phys Chem A 2017; 121:1924-1931. [PMID: 28209060 DOI: 10.1021/acs.jpca.6b10314] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Modern medicine has been searching for new and more efficient strategies for diagnostics and therapeutics applications. Considering this, porphyrin molecules have received great interest for applications in photodiagnostics and phototherapies, even as magnetic nanoparticles for drug-delivery systems and magnetic-hyperthermia therapy. Aiming to obtain a multifunctional system, which combines diagnostics with therapeutic functions on the same platform, the present study employed UV/vis absorption and fluorescence spectroscopies to evaluate the interaction between meso-tetrakis(p-sulfonatofenyl)porphyrin (TPPS) and maghemite nanoparticles (γ-Fe2O3). These spectroscopic techniques allowed us to describe the dynamics of coupling porphyrins on nanoparticles and estimate the number of 21 porphyrins per nanoparticle. Also, the binding parameters, such as the association constants (Ka = 8.89 × 105 M-1) and bimolecular quenching rate constant (kq = 2.54 × 1014 M-1 s-1) were obtained. These results suggest a static quenching process where the electrostatic attraction plays an essential role. The work shows that spectroscopic techniques are powerful tools to evaluate the coupling of organic molecules and nanoparticles. Besides, the system studied provides a relevant background for potential applications in bionanotechnology and nanomedicine, such as (1) nanodrug delivery system, (2) photodiagnostics/theranostics, and/or (3) a combined action of photodynamic and hyperthermia therapies, working in a synergetic way.
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Affiliation(s)
- Lais N Magno
- Instituto de Física and §Programa de Pós-graduação em Química, Universidade Federal de Goiás , 74690-900 Goiânia, GO, Brazil
| | - Fábio C Bezerra
- Instituto de Física and §Programa de Pós-graduação em Química, Universidade Federal de Goiás , 74690-900 Goiânia, GO, Brazil
| | - Luiz Eduardo S Freire
- Instituto de Física and §Programa de Pós-graduação em Química, Universidade Federal de Goiás , 74690-900 Goiânia, GO, Brazil
| | - Rubens A Guerra
- Instituto de Física and §Programa de Pós-graduação em Química, Universidade Federal de Goiás , 74690-900 Goiânia, GO, Brazil.,Faculdade Santa Rita de Cássia , Av. Adelina Alves Vilela, n° 393, Jd. Primavera, 75.524-680 Itumbiara, GO, Brazil
| | - Andris F Bakuzis
- Instituto de Física and §Programa de Pós-graduação em Química, Universidade Federal de Goiás , 74690-900 Goiânia, GO, Brazil
| | - Pablo J Gonçalves
- Instituto de Física and §Programa de Pós-graduação em Química, Universidade Federal de Goiás , 74690-900 Goiânia, GO, Brazil
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15
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Hamer M, Rezzano IN. Classical Characterization Techniques to Reveal the Structural Model of Nanocomposites with Bimetallic Monolayers of Porphyrins. Inorg Chem 2016; 55:8595-602. [PMID: 27482597 DOI: 10.1021/acs.inorgchem.6b01136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nanocomposites with bimetallic monolayers of porphyrins were prepared. The well-ordered metalloporphyrin monolayers covalently linked to the gold surface produce an important increase of the B band (∼400 nm) shifted 20 nm relative to that of the related high-spin iron(III) complexes in solution. The position of the B band in the bimetallic architectures is highly dependent on the relative amount of the two porphyrins, showing the most significant shift for the SiO2/APTES/AuNp/Fe-TPyP&M-TPyP (1:1) (30 nm, M = Ni(II) or Cu(II)). Resonance Raman based on the oxidation state marker bands (1553, 1354, and 390 cm(-1)) indicates that Fe-TPyP attached on gold nanoparticles adopts a low-spin Fe(II) conformation, which changes to Fe(II) intermediate spin or a low-spin Fe(III) in the presence of Cu-TPyP or Ni-TPyP. Surface-enhanced Raman scattering studies confirmed the hypothesis. MALDI-TOF analysis of the composites on gold nanoparticles was very useful in the detection of oxygenated forms of the metal complexes.
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Affiliation(s)
- Mariana Hamer
- Universidad de Buenos Aires , Facultad de Farmacia y Bioquı́mica, CONICET-IQUIFIB, Junin 956, CP 1113 Buenos Aires, Argentina
| | - Irene N Rezzano
- Universidad de Buenos Aires , Facultad de Farmacia y Bioquı́mica, CONICET-IQUIFIB, Junin 956, CP 1113 Buenos Aires, Argentina
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16
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Shaikh AJ. Exploring the Direction of Charge Transfer in Porphyrin - PbSe Quantum Dot Hybrids. ChemistrySelect 2016. [DOI: 10.1002/slct.201600180] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ahson J. Shaikh
- Department of Chemistry; COMSATS Institute of Information Technology; Abbottabad- 22060, KPK Pakistan
- Department of Chemical Engineering; Delft University of Technology; Julianalaan 136 2628 BL Delft the Netherlands
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17
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Ray A, Bhattacharya S. Chemical physics behind phthalocyanine–gold nanoparticle interaction and its effect over supramolecular interaction between PC70BM and phthalocyanine in solution. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.09.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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