1
|
Gomes ICP, Divino LDA, Rodrigues FM, Fleury CMF, Ducas ESA, Desordi JC, Iglesias BA, Santana RC, Monteiro CMO, Lopes WDZ, Gonçalves PJ, Souza GRL. Daylight photodynamic inactivation of cattle tick Rhipicephalus microplus by porphyrins: An alternative for the ectoparasite control. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2024; 251:112847. [PMID: 38241947 DOI: 10.1016/j.jphotobiol.2024.112847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/22/2023] [Accepted: 01/12/2024] [Indexed: 01/21/2024]
Abstract
The bovine tick Rhipicephalus microplus, a primary ectoparasite of veterinary concern, contributes significantly to disease transmission and reduced cattle productivity, resulting in substantial economic losses. The overuse of chemical acaricides has led to the emergence of resistant strains, posing a considerable challenge to veterinary medicine. Consequently, the development of alternative parasite control methods is essential to ensure livestock quality and enhance food safety worldwide. Our study introduces an innovative approach to photodynamic inactivation (PDI) of the bovine tick, harnessing natural daylight for a potential field application. Reproductive parameters (female and egg mass, egg production index, and larval hatch) were evaluated in engorged female ticks under photodynamic action using the hematoporphyrin (HP) and tetra-cationic porphyrins free-base meso-tetra-ruthenated (4-pyridyl) (RuTPyP) and its zinc(II) complex (ZnRuTPyP) as photosensitizers (PS). The results showed that there was no significant difference between the groups treated with tetra‑ruthenium porphyrins and the control group. However, HP exhibits a control percentage of 97.9% at a concentration of 2.5 μmol.L-1, aligning with the expected control rates achieved by conventional chemical acaricides. Photophysical and physicochemical parameters such as the number of singlet oxygen produced and lipophilicity were discussed for each PS and related to tick control percentages. Furthermore, the interaction between HP and chitin, an important macromolecule presents in the tick's cuticle, considered as the primary target tick structure during PDI was observed by the absorption and fluorescence emission spectroscopic techniques. Therefore, the results presented here extend the potential for controlling R. microplus through photodynamic inactivation while utilizing sunlight as a source of natural irradiation.
Collapse
Affiliation(s)
| | - Lorena Dias Amor Divino
- Programa de Pós-Graduação em Ciências Animal, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | | | | | | | | | - Bernardo Almeida Iglesias
- Laboratório de Bioinorgânica e Materiais Porfirínicos, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | | | - Caio Márcio Oliveira Monteiro
- Programa de Pós-Graduação em Ciências Animal, Universidade Federal de Goiás, Goiânia, Goiás, Brazil; Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Welber Daniel Zanetti Lopes
- Programa de Pós-Graduação em Ciências Animal, Universidade Federal de Goiás, Goiânia, Goiás, Brazil; Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Pablo José Gonçalves
- Instituto de Química, Universidade Federal de Goiás, Goiânia, Brazil; Instituto de Física, Universidade Federal de Goiás, Goiânia, Brazil; Centro de Excelência em Hidrogênio e Tecnologias Energéticas Sustentáveis (CEHTES), Goiânia, GO, Brazil.
| | - Guilherme Rocha Lino Souza
- Programa de Pós-Graduação em Ciências Animal, Universidade Federal de Goiás, Goiânia, Goiás, Brazil; Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Goiás, Brazil.
| |
Collapse
|
2
|
Silva RC, Buzzá HH, Ducas ESA, Oliveira KT, Bagnato VS, Souza GRL, Almeida LM, Gonçalves PJ. Synergic vascular photodynamic activity by methylene blue-curcumin supramolecular assembly. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123281. [PMID: 37625276 DOI: 10.1016/j.saa.2023.123281] [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: 03/10/2023] [Revised: 08/14/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023]
Abstract
A supramolecular assembly was obtained by combining methylene blue (MB) with a natural plant extract, curcumin (Curc), in a stoichiometric ratio of 1:4 in aqueous solution (90% PBS + 10% ethanol) at room temperature. The MB-Curc supramolecular assembly was evidenced by absorption and fluorescence spectroscopies, and the stoichiometry and bonding constant were obtained using Cieleńs model. Its stability and photostability were evaluated by chromatographic analysis and UV-Vis absorption. The MB-Curc avoids the aggregation of both isolated compounds and efficiently produces singlet oxygen (ΦΔ= 0.52 ± 0.03). Its potential for photodynamic antiangiogenic treatments was evaluated through the vascular effect observed in chicken chorioallantoic membrane (CAM) assay. The results showed intense damage in CAM vascular network by MB-Curc after irradiation, which is higher than the effect of isolated compounds, indicating a synergistic vascular effect. This combination can be essential to prevent cancer revascularization after photodynamic application and improve the efficacy of this approach. The characteristics exhibited by MB-Curc make it a potential candidate for use in cancer treatments through photodynamic antiangiogenic therapy.
Collapse
Affiliation(s)
- Rodrigo C Silva
- Instituto de Química, Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil; Departamento de Química, Universidade Federal de São Carlos (UFSCar), São Carlos, SP, Brazil.
| | - Hilde H Buzzá
- Instituto de Física de São Carlos, Universidade de São Paulo (IFSC, USP), São Carlos, SP, Brazil; Instituto de Física, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Eli S A Ducas
- Instituto de Química, Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil
| | - Kleber T Oliveira
- Departamento de Química, Universidade Federal de São Carlos (UFSCar), São Carlos, SP, Brazil
| | - Vanderlei S Bagnato
- Instituto de Física de São Carlos, Universidade de São Paulo (IFSC, USP), São Carlos, SP, Brazil; Hagler Fellow, Texas A&M University, College Station, United States
| | - Guilherme R L Souza
- Instituto de Ciências Biológicas, Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil
| | - Luciane M Almeida
- Universidade Estadual de Goiás (UEG), Campus Anápolis de Ciências Exatas e Tecnológicas, Anápolis, GO, Brazil
| | - Pablo J Gonçalves
- Instituto de Química, Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil; Instituto de Física, Universidade Federal de Goiás (UFG), Goiânia, GO, Brazil.
| |
Collapse
|
3
|
Baumgartner B, Prins PT, Louwen JN, Monai M, Weckhuysen BM. The Role of Water in Carbon Dioxide Adsorption in Porphyrinic Metal-Organic Frameworks. ChemCatChem 2023; 15:e202300722. [PMID: 38505862 PMCID: PMC10946852 DOI: 10.1002/cctc.202300722] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/10/2023] [Indexed: 03/21/2024]
Abstract
Capturing and converting CO2 through artificial photosynthesis using photoactive, porous materials is a promising approach for addressing increasing CO2 concentrations. Porphyrinic Zr-based metal-organic frameworks (MOFs) are of particular interest as they incorporate a photosensitizer in the porous structure. Herein, the initial step of the artificial photosynthesis is studied: CO2 sorption and activation in the presence of water. A combined vibrational and visible spectroscopic approach was used to monitor the adsorption of CO2 into PCN-222 and PCN-223 MOFs, and the photophysical changes of the porphyrinic linker as a function of water concentration. A shift in CO2 sorption site and bending of the porphyrin macrocycle in response to humidity was observed, and CO2/H2O competition experiments revealed that the exchange of CO2 with H2O is pore-size dependent. Therefore, humidity and pore-size can be used to tune CO2 sorption, CO2 capacity, and light harvesting in porphyrinic MOFs, which are key factors for CO2 photoreduction.
Collapse
Affiliation(s)
- Bettina Baumgartner
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Department of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - P. Tim Prins
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Department of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Jaap N. Louwen
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Department of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Matteo Monai
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Department of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| | - Bert M. Weckhuysen
- Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Department of ChemistryUtrecht UniversityUniversiteitsweg 993584 CGUtrechtThe Netherlands
| |
Collapse
|
4
|
Lopes J, Machado A, Batista A, Iglesias B, Araujo P, Barbosa Neto N. Fluorinated phenyl meso-substituents regulating excited state absorption-driven protonation of free-base porphyrins. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
5
|
Codognato D, Pena F, dos Reis E, Ramos A, Borissevitch I. Effects of serum albumin on the photophysical characteristics of synthetic and endogenous protoporphyrin IX. Braz J Med Biol Res 2022; 55:e12272. [PMID: 36197413 PMCID: PMC9529045 DOI: 10.1590/1414-431x2022e12272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 07/01/2022] [Indexed: 11/27/2022] Open
Abstract
The study of the interaction of synthetic protoporphyrin IX (PpIXs) and protoporphyrin IX extracted from Harderian glands of ssp Rattus novergicus albinus rats (PpIXe) with bovine serum albumin (BSA) was conducted in water at pH 7.3 and pH 4.5 by optical absorption and fluorescence spectroscopies. PpIXs is present as H- and J-aggregates in equilibrium with themselves and with monomers. The PpIXs charge is 2- at pH 7.3 and 1- at pH 4.5. This increases its aggregation at pH 4.5 and shifts the equilibrium in favor of J-aggregates. In spite of electrostatic attraction at pH 4.5, where BSA is positive, the binding constant (Kb) of PpIXs to BSA is 20% less than that at pH 7.3, where BSA is negative. This occurs because higher aggregation of PpIXs at pH 4.5 reduces the observed Kb value. At both pHs, water-soluble PpIXe exists in the monomeric form with the charge of 1- and its Kb exceeds that of PpIXs. At pH 4.5, its Kb is 12 times higher than that at pH 7.3 due to electrostatic attraction between the positively charged BSA and the negatively charged PpIXe. The higher probability of PpIXe binding to BSA makes PpIXe more promising as a fluorescence probe for fluorescence diagnostics and as a photosensitizer for photodynamic therapy. The existence of PpIXe in the monomeric form can explain its faster cell internalization. Aggregation reduces quantum yields and lifetimes of the PpIXs excited states, which explains higher phototoxicity of PpIXe toward malignant cells compared with PpIXs.
Collapse
Affiliation(s)
- D.C.K. Codognato
- Departamento de Física, Faculdade de Filosofia, Ciências e
Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP,
Brasil
| | - F.S. Pena
- EcoFarm Alimentando Vidas, Caconde, SP, Brasil
| | - E.R. dos Reis
- Laboratório de Laser, Centro Experimental de Medicina e
Cirurgia, Faculdade de Ciências Médicas, Universidade Estadual de Campinas,
Campinas, SP, Brasil
| | - A.P. Ramos
- Departamento de Química, Faculdade de Filosofia, Ciências e
Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP,
Brasil
| | - I.E. Borissevitch
- Departamento de Física, Faculdade de Filosofia, Ciências e
Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP,
Brasil
| |
Collapse
|
6
|
Novoa-Cid M, Melillo A, Ferrer B, Alvaro M, Baldovi HG. Photocatalytic Water Splitting Promoted by 2D and 3D Porphyrin Covalent Organic Polymers Synthesized by Suzuki-Miyaura Carbon-Carbon Coupling. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12183197. [PMID: 36144987 PMCID: PMC9503735 DOI: 10.3390/nano12183197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/02/2022] [Accepted: 09/03/2022] [Indexed: 05/14/2023]
Abstract
This work deals with the synthesis of metal-free and porphyrin-based covalent organic polymers (COPs) by the Suzuki-Miyaura coupling carbon-carbon bond forming reaction to study the photocatalytic overall water splitting performance. Apart from using 5,10,15,20-Tetrakis-(4-bromophenyl)porphyrin, we have chosen different cross-linker monomers to induce 2-dimensional (2D) or 3-dimensional (3D) and different rigidity in their resulting polymeric molecular structure. The synthesised COPs were extensively characterised to reveal that the dimensionality and flexibility of the molecular structure play an intense role in the physical, photochemical, and electronic properties of the polymers. Photoinduced excited state of the COPs was evaluated by nanosecond time-resolved laser transient absorption spectroscopy (TAS) by analysing excited state kinetics and quenching experiments, photocurrent density measurements and photocatalytic deposition of Ru3+ to RuO2, and photocatalysis. In summary, TAS experiments demonstrated that the transient excited state of these polymers has two decay kinetics and exhibit strong interaction with water molecules. Moreover, photocurrent and photocatalytic deposition experiments proved that charges are photoinduced and are found across the COP molecular network, but more important charges can migrate from the surface of the COP to the medium. Among the various COPs tested, COP-3 that has a flexible and 3D molecular structure reached the best photocatalytic performances, achieving a photocatalytic yield of 0.4 mmol H2 × gCOP-3-1 after 3 h irradiation.
Collapse
Affiliation(s)
- Maria Novoa-Cid
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
- Instituto de Tecnología Química CSIC-UPV, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Arianna Melillo
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Belén Ferrer
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Mercedes Alvaro
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Herme G. Baldovi
- Department of Chemistry, Universitat Politècnica de València, 46022 Valencia, Spain
- Instituto de Tecnología Química CSIC-UPV, Universitat Politècnica de València, 46022 Valencia, Spain
- Correspondence:
| |
Collapse
|
7
|
Lopes J, Machado A, Batista A, Araujo P, Barbosa Neto N. Protonation, exciplex, and evidence of aggregate formation in meso-tetra(4-pyridyl) porphyrin triggered by excited-state absorption. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
8
|
Miao Q, Sang Z, Liang M, Song R, Sun E, Xu Y. Different parameter influences of picosecond pulse trains on optical properties of aminophenoxy substituted phthalocyanines and covalent linkage conjugates to cadmium telluride quantum dots. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2021.113525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
9
|
Miao Q, Sang Z, Sun YP, Liang M, Song R, Sun E, Xu Y. Optical properties of aminophenoxy substituted phthalocyanines and covalent linkage conjugates to cadmium telluride quantum dots interacting with picosecond pulse trains. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
10
|
Effect of Serum Albumin on Porphyrin-Quantum Dot Complex Formation, Characteristics and Spectroscopic Analysis. NANOMATERIALS 2021; 11:nano11071674. [PMID: 34202308 PMCID: PMC8308150 DOI: 10.3390/nano11071674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/16/2021] [Accepted: 06/21/2021] [Indexed: 11/17/2022]
Abstract
The effect of bovine serum albumin (BSA) upon interaction between CdTe QD functionalized by 3-Mercaptopropionic Acid (CdTe-3-MPA QD) and two water soluble porphyrins: positively charged meso-tetra methyl pyridyl porphyrin (TMPyP) and negatively charged meso-tetrakis(p-sulfonato-phenyl) porphyrin (TPPS4), was studied in function of pH using the steady-state and time resolved optical absorption and fluorescence spectroscopies. It was shown that, depending on the charge state of the components, interaction with albumin could either prevent the formation of the QD…PPh complex, form a mixed QD…PPh…BSA complex or not affect PPh complexation with QD at all. The obtained results may be of interest for application in photomedicine.
Collapse
|
11
|
Optical dynamics of aminophenoxy substituted phthalocyanines and the covalent attachments to cadmium telluride quantum dots for picosecond pulse trains. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
12
|
Caruso E, Malacarne MC, Banfi S, Gariboldi MB, Orlandi VT. Cationic diarylporphyrins: In vitro versatile anticancer and antibacterial photosensitizers. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 197:111548. [PMID: 31288120 DOI: 10.1016/j.jphotobiol.2019.111548] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 06/07/2019] [Accepted: 07/01/2019] [Indexed: 10/26/2022]
Abstract
The visible light combined with photosensitizers (PSs) is exploited in both antitumoral and antimicrobial fields inducing a photo-oxidative stress within the target cells. Among the different PSs, porphyrins belong to the family of the most promising compounds to be used in clinical photodynamic applications. Although in the last years many porphyrins have been synthesised and tested, only a few reports concern the in vitro effects of the 5,15-diarylporphyrins. In this work, the activity of four 5,15-diarylporphyrins (compounds 7-10), bearing alkoxy-linked pyridinium appendixes, have been tested on cancer cell lines and against bacterial cultures. Among the synthetized PSs, compounds 7 and 9 are not symmetrically substituted porphyrins showing one cationic charge tethered at the end of one 4C or 8C carbon chains, respectively. On the other hand, compounds 8 and 10 are symmetrically substituted and show two chains of C4 and C8 carbons featuring a cationic charge at the end of both chains. The dicationic 8 and 10 were more hydrophilic than monocationic 7 and 9, outlining that the presence of two pyridinium salts have a higher impact on the solubility in the aqueous phase than the lipophilic effect exerted by the length of the alkyl chains. Furthermore, these four PSs showed a similar rate of photobleaching, irrespective of the length and number of chains and the number of positive charges. Among the eukaryotic cell lines, the SKOV3 cells were particularly sensitive to the photodynamic activity of all the tested diarylporphyrins, while the HCT116 cells were found more sensitive to PSs bearing C4 chain (7 and 8), regardless the number of cationic charges. The photo-induced killing effect of these porphyrins was also tested against two different bacterial cultures. As expected, the Gram positive Bacillus subtilis was more sensitive than the Gram negative Escherichia coli, and the dicationic porphyrin 8, bearing two C4 chains, was the most efficient on both microorganisms. In conclusion, the new compound 8 seems to be an optimal candidate to deepen as versatile anticancer and antibacterial photosensitizer.
Collapse
Affiliation(s)
- Enrico Caruso
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Via J.H. Dunant 3, 21100 Varese, VA, Italy..
| | - Miryam Chiara Malacarne
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Via J.H. Dunant 3, 21100 Varese, VA, Italy
| | - Stefano Banfi
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Via J.H. Dunant 3, 21100 Varese, VA, Italy
| | - Marzia Bruna Gariboldi
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Via J.H. Dunant 3, 21100 Varese, VA, Italy
| | - Viviana Teresa Orlandi
- Department of Biotechnology and Life Sciences (DBSV), University of Insubria, Via J.H. Dunant 3, 21100 Varese, VA, Italy
| |
Collapse
|
13
|
Nonlinear transmission properties of chloroindium phthalocyanines for picosecond pulse trains. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
14
|
Cocca LH, Gotardo F, Sciuti LF, Acunha TV, Iglesias BA, de Boni L. Investigation of excited singlet state absorption and intersystem crossing mechanism of isomeric meso-tetra(pyridyl)porphyrins containing peripheral polypyridyl platinum(II) complexes. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.07.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
15
|
Miao Q, Song R, Sun E, Xu Y. How pulse train parameters take effect on nonlinear dynamics of naphthalocyanines and phthalocyanines? Mol Phys 2017. [DOI: 10.1080/00268976.2017.1401744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Quan Miao
- College of Electronics, Communication and Physics, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Rengang Song
- College of Electronics, Communication and Physics, Shandong University of Science and Technology, Qingdao, People's Republic of China
- College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Erping Sun
- College of Electronics, Communication and Physics, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Yan Xu
- College of Electronics, Communication and Physics, Shandong University of Science and Technology, Qingdao, People's Republic of China
- College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao, People's Republic of China
| |
Collapse
|
16
|
Pucelik B, Paczyński R, Dubin G, Pereira MM, Arnaut LG, Dąbrowski JM. Properties of halogenated and sulfonated porphyrins relevant for the selection of photosensitizers in anticancer and antimicrobial therapies. PLoS One 2017; 12:e0185984. [PMID: 29016698 PMCID: PMC5634595 DOI: 10.1371/journal.pone.0185984] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 09/24/2017] [Indexed: 01/10/2023] Open
Abstract
The impact of substituents on the photochemical and biological properties of tetraphenylporphyrin-based photosensitizers for photodynamic therapy of cancer (PDT) as well as photodynamic inactivation of microorganisms (PDI) was examined. Spectroscopic and physicochemical properties were related with therapeutic efficacy in PDT of cancer and PDI of microbial cells in vitro. Less polar halogenated, sulfonamide porphyrins were most readily taken up by cells compared to hydrophilic and anionic porphyrins. The uptake and PDT of a hydrophilic porphyrin was significantly enhanced with incorporation in polymeric micelles (Pluronic L121). Photodynamic inactivation studies were performed against Gram-positive (S. aureus, E. faecalis), Gram-negative bacteria (E. coli, P. aeruginosa, S. marcescens) and fungal yeast (C. albicans). We observed a 6 logs reduction of S. aureus after irradiation (10 J/cm2) in the presence of 20 μM of hydrophilic porphyrin, but this was not improved with incorporation in Pluronic L121. A 2–3 logs reduction was obtained for E. coli using similar doses, and a decrease of 3–4 logs was achieved for C. albicans. Rational substitution of tetraphenylporphyrins improves their photodynamic properties and informs on strategies to obtain photosensitizers for efficient PDT and PDI. However, the design of the photosensitizers must be accompanied by the development of tailored drug formulations.
Collapse
Affiliation(s)
- Barbara Pucelik
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Krakow, Poland
| | - Robert Paczyński
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | - Grzegorz Dubin
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | | | - Luis G. Arnaut
- Chemistry Department, University of Coimbra, Coimbra, Portugal
| | - Janusz M. Dąbrowski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Krakow, Poland
- * E-mail:
| |
Collapse
|
17
|
Gotardo F, Cocca LH, Acunha TV, Longoni A, Toldo J, Gonçalves PF, Iglesias BA, De Boni L. Investigating the intersystem crossing rate and triplet quantum yield of Protoporphyrin IX by means of pulse train fluorescence technique. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.02.055] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
18
|
|
19
|
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.
Collapse
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
| |
Collapse
|
20
|
de Souza TGB, Vivas MG, Mendonça CR, Plunkett S, Filatov MA, Senge MO, De Boni L. Studying the intersystem crossing rate and triplet quantum yield of meso-substituted porphyrins by means of pulse train fluorescence technique. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s1088424616500048] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Excited state dynamics, particularly intersystem crossing, of a set of meso-substituted porphyrins bearing different electron–donor and acceptor groups was studied by pulse train fluorescence technique. Triplet quantum yield was found to be critically dependent on the nature of meso-substituents in the porphyrin system. Porphyrins with meso methoxyphenyl groups were found to show high triplet quantum yields ([Formula: see text] between 0.70 and 0.81). Moreover, the quantity of methoxyphenyl groups and the substitution pattern directly influence [Formula: see text]. Alternatively, porphyrins attached to nitrophenyl group possess low triplet quantum yield values (~0.3). The observed structure-properties relationships suggest new ways for tuning the optical properties of porphyrins via chemical modification.
Collapse
Affiliation(s)
| | - Marcelo Gonçalves Vivas
- Instituto de Ciência de Tecnologia, Universidade Federal de Alfenas, Cidade Universitária-BR 267 Km 533, 37715-400 Poços de Caldas, MG, Brazil
| | - Cleber Renato Mendonça
- Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970 São Carlos-SP, Brazil
| | - Shane Plunkett
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, Dublin 2, Ireland
| | - Mikhail A. Filatov
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, Dublin 2, Ireland
| | - Mathias O. Senge
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, Dublin 2, Ireland
| | - Leonardo De Boni
- Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970 São Carlos-SP, Brazil
| |
Collapse
|
21
|
Sour A, Jenni S, Ortí-Suárez A, Schmitt J, Heitz V, Bolze F, Loureiro de Sousa P, Po C, Bonnet CS, Pallier A, Tóth É, Ventura B. Four Gadolinium(III) Complexes Appended to a Porphyrin: A Water-Soluble Molecular Theranostic Agent with Remarkable Relaxivity Suited for MRI Tracking of the Photosensitizer. Inorg Chem 2016; 55:4545-54. [DOI: 10.1021/acs.inorgchem.6b00381] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Angélique Sour
- Laboratoire de Synthèse
des Assemblages Moléculaires Multifonctionnels, Institut de
Chimie de Strasbourg, CNRS/UMR 7177, Université de Strasbourg, 4 rue
Blaise Pascal, 67000 Strasbourg, France
| | - Sébastien Jenni
- Laboratoire de Synthèse
des Assemblages Moléculaires Multifonctionnels, Institut de
Chimie de Strasbourg, CNRS/UMR 7177, Université de Strasbourg, 4 rue
Blaise Pascal, 67000 Strasbourg, France
| | - Ana Ortí-Suárez
- Laboratoire de Synthèse
des Assemblages Moléculaires Multifonctionnels, Institut de
Chimie de Strasbourg, CNRS/UMR 7177, Université de Strasbourg, 4 rue
Blaise Pascal, 67000 Strasbourg, France
| | - Julie Schmitt
- Laboratoire de Synthèse
des Assemblages Moléculaires Multifonctionnels, Institut de
Chimie de Strasbourg, CNRS/UMR 7177, Université de Strasbourg, 4 rue
Blaise Pascal, 67000 Strasbourg, France
| | - Valérie Heitz
- Laboratoire de Synthèse
des Assemblages Moléculaires Multifonctionnels, Institut de
Chimie de Strasbourg, CNRS/UMR 7177, Université de Strasbourg, 4 rue
Blaise Pascal, 67000 Strasbourg, France
| | - Frédéric Bolze
- CAMB, UMR 7199,
UdS/CNRS, Faculté de Pharmacie, Université de Strasbourg, 74 route
du Rhin, 67401 Illkirch, France
| | - Paulo Loureiro de Sousa
- CNRS, ICube, FMTS, Institut de Physique
Biologique, Faculté de Médecine, Université de Strasbourg, 4 rue Kirschleger, 67085 Strasbourg Cedex, France
| | - Chrystelle Po
- CNRS, ICube, FMTS, Institut de Physique
Biologique, Faculté de Médecine, Université de Strasbourg, 4 rue Kirschleger, 67085 Strasbourg Cedex, France
| | - Célia S. Bonnet
- Centre
de Biophysique Moléculaire, CNRS UPR 4301, Université d’Orléans, rue Charles Sadron, CS 80054, 45071 Orléans Cedex 2, France
| | - Agnès Pallier
- Centre
de Biophysique Moléculaire, CNRS UPR 4301, Université d’Orléans, rue Charles Sadron, CS 80054, 45071 Orléans Cedex 2, France
| | - Éva Tóth
- Centre
de Biophysique Moléculaire, CNRS UPR 4301, Université d’Orléans, rue Charles Sadron, CS 80054, 45071 Orléans Cedex 2, France
| | | |
Collapse
|
22
|
Quantum dot effects upon the interaction between porphyrins and phospholipids in cell membrane models. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2015; 45:219-27. [DOI: 10.1007/s00249-015-1088-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 10/09/2015] [Indexed: 01/07/2023]
|
23
|
Ge R, Wang X, Zhang C, Kang SZ, Qin L, Li G, Li X. The influence of combination mode on the structure and properties of porphyrin–graphene oxide composites. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.05.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
24
|
Rodrigues S, Machado A, Berardi M, Ito A, Almeida L, Santana M, Liao L, Barbosa Neto N, Gonçalves P. Investigation of protonation effects on the electronic and structural properties of halogenated sulfonated porphyrins. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.12.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
25
|
Gold-phosphine-porphyrin as potential metal-based theranostics. J Biol Inorg Chem 2015; 20:143-154. [PMID: 25476859 DOI: 10.1007/s00775-014-1220-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 11/18/2014] [Indexed: 01/12/2023]
Abstract
Two new gold-phosphine-porphyrin derivatives were synthesized and fully characterized, and their photophysical properties investigated along a water-soluble analog. The cytotoxicity of the compounds was tested on cancer cells (HCT116 and SW480), and their cell uptake was followed by fluorescence microscopy in vitro (on SW480). The proof that the water-soluble gold-phosphine-porphyrin is a biologically active compound that can be tracked in vitro was clearly established, especially concerning the water-soluble analog. Some preliminary photodynamic therapy (PDT) experiments were also performed. They highlight a dramatic increase of the cytotoxicity when the cells were illuminated for 30 min with white light.
Collapse
|
26
|
Zawadzka M, Wang J, Blau WJ, Senge MO. Laser induced protonation of free base porphyrin in chloroform results in the enhancement of positive nonlinear absorption due to conformational distortion. J PORPHYR PHTHALOCYA 2013. [DOI: 10.1142/s108842461350082x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Free base porphyrin in chloroform solution irradiated with focused laser beam, in an open Z-scan set-up, changed color from purple to green, which was associated with protonation of the porphyrin with protonic species from photodegradation of the solvent. Protonation is demonstrated as a simple means to improve the optical limiting performance of free base porphyrin nonlinear optical (NLO) materials.
Collapse
Affiliation(s)
- Monika Zawadzka
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, Dublin 2, Ireland
| | - Jun Wang
- Key Laboratory of Materials for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, 201800 Shanghai, China
| | - Werner J. Blau
- School of Physics, Trinity College Dublin, Dublin 2, Ireland
| | - Mathias O. Senge
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, Dublin 2, Ireland
| |
Collapse
|
27
|
Lu G, Zhang X, Cai X, Fang Y, Zhu M, Zhu W, Ou Z, Kadish KM. Synthesis, structural characterization and protonation/deprotonation of hydroxyl-substituted free-base tetraphenylporphyrins in nonaqueous media. J PORPHYR PHTHALOCYA 2013. [DOI: 10.1142/s1088424613500557] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A series of hydroxyl-substituted free-base tetraphenylporphyrins was synthesized and characterized by UV-vis spectroscopy, 1 H NMR and mass spectrometry. The porphyrins are represented as (HOPh) n(t BuPh )4-n PH 2, where Ph presents a phenyl group, HO and t Bu are substituents on the para-positions of the phenyl rings of the macrocycle, n = 0–4 and P represents the dianion of tetraphenylporphyrin. The UV-visible properties of each porphyrin were examined in dichloromethane (DCM), N,N′-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) before and after addition of trifluoroacetic acid (TFA) or sodium hydroxide (NaOH) to solution. Equilibrium constants for protonation ( log βn) and deprotonation [Formula: see text] of each compound were determined using standard equations. The protonations occur in a single step involving a simultaneous two proton addition at the porphyrin central nitrogens. The phenolic protons on (HOPh) n(t BuPh )4-n PH 2 are easier to deprotonate than the core nitrogen protons of the porphyrins and this reaction occurs in a single step involving the simultaneous loss of 1–4 protons on the hydroxyl groups followed by a loss of two protons from the central nitrogens. The effect of HO substituents on UV-visible spectra and the magnitude of the protonation/deprotonation constants ( log βn and [Formula: see text]) are discussed. Two of the porphyrins, (t BuPh )4 PH 2 and trans- (HOPh) 2(t BuPh )2 PH 2, are also characterized by a single-crystal X-ray analysis.
Collapse
Affiliation(s)
- Guifen Lu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Xiufeng Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Xu Cai
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yuanyuan Fang
- Department of Chemistry, University of Houston, Houston, TX 77204-5003, USA
| | - Min Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Weihua Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Zhongping Ou
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Karl M. Kadish
- Department of Chemistry, University of Houston, Houston, TX 77204-5003, USA
| |
Collapse
|
28
|
Gonçalves PJ, Corrêa DS, Franzen PL, De Boni L, Almeida LM, Mendonça CR, Borissevitch IE, Zílio SC. Effect of interaction with micelles on the excited-state optical properties of zinc porphyrins and J-aggregates formation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 112:309-317. [PMID: 23685798 DOI: 10.1016/j.saa.2013.04.065] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Revised: 03/27/2013] [Accepted: 04/14/2013] [Indexed: 06/02/2023]
Abstract
This work reports on the photophysical properties of zinc porphyrins meso-tetrakis methylpyridiniumyl (Zn(2+)TMPyP) and meso-tetrakis sulfonatophenyl (Zn(2+)TPPS) in homogeneous aqueous solutions and in the presence of sodium dodecyl sulfate (SDS) and cetyltrimethyl ammonium bromide (CTAB) micelles. The excited-state dynamic was investigated with the Z-scan technique, UV-Vis absorption, and fluorescence spectroscopy. Photophysical parameters were obtained by analyzing the experimental data with a conventional five-energy-level diagram. The interaction of the charged side porphyrin groups with oppositely charged surfactants can reduce the electrostatic repulsion between porphyrin molecules leading to aggregation, which affected the porphyrin characteristics such as absorption cross-sections, lifetimes and quantum yields. The interaction between anionic ZnTPPS with cationic CTAB micelles induced the formation of porphyrin J-aggregates, while this effect was not observed in the interaction of ZnTMPyP with SDS micelles. This difference is, probably, due to the difference in electrostatic repulsion between the porphyrin molecules. The insights obtained by these results are important for the understanding of the photophysical behavior of porphyrins, regarding potential applications in pharmacokinetics as encapsulation of photosensitizer for drug delivery systems and in its interaction with cellular membrane.
Collapse
Affiliation(s)
- P J Gonçalves
- Instituto de Física, Universidade Federal de Goiás, Caixa Postal 131, 74001-970 Goiânia, GO, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Zawadzka M, Wang J, Blau WJ, Senge MO. Nonlinear absorption properties of 5,10-A2B2 porphyrins – correlation of molecular structure with the nonlinear responses. Photochem Photobiol Sci 2013; 12:996-1007. [DOI: 10.1039/c3pp25410k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
30
|
Varchi G, Benfenati V, Pistone A, Ballestri M, Sotgiu G, Guerrini A, Dambruoso P, Liscio A, Ventura B. Core–shell poly-methylmethacrylate nanoparticles as effective carriers of electrostatically loaded anionic porphyrin. Photochem Photobiol Sci 2013; 12:760-9. [DOI: 10.1039/c2pp25393c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
31
|
Rahman M, James Harmon H. Inhibition of aggregation of meso-tetra(4-sulfonatophenyl)-porphyrin (H4TPPS) by urea. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424607000163] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The inhibition of the formation of J-aggregates of meso-tetra(4-sulfonatophenyl)-porphyrin ( H 4 TPPS ) by urea is investigated spectroscopically by absorbance, fluorescence, and fluorescence lifetime techniques. In 8 M urea at pH 2 with 0.1 M NaCl , diacid TPPS ( H 4 TPPS ) exists as a monomer up to 75 μM H 4 TPPS where the absorbance is linearly dependent on porphyrin concentration. The extinction coefficient of monomeric H 4 TPPS in 8 M urea at pH 2 with 0.1 M NaCl at 438 nm is 4.43 × 105 M -1. cm -1. No aggregation peaks at 491 nm and 708 nm are found in the 0.5-75 μM concentration range. Aggregated H 4 TPPS (10 μM) molecules in pH 2 buffer dissociate to monomers when the temperature is raised to 65°C. In D 2 O at pH 2, no aggregation is observed. These spectral observations suggest that the H 4 TPPS aggregation involves intermolecular hydrogen bonding.
Collapse
Affiliation(s)
- Mahmudur Rahman
- Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA
| | - H. James Harmon
- Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA
| |
Collapse
|
32
|
Ma H, Sun S, Chen X, Wu D, Zhu P, Du B, Wei Q. Spectroscopic studies of aggregation behavior of meso-tetra(4-hydroxyphenyl)porphyrin in aqueous AOT solution. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424608000133] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The interactions of two amphiphilic porphyrins with anionic surfactant sodium bis(2-ethylhexyl)sulfosuccinate (AOT) in aqueous solutions were studied by UV-vis absorption spectroscopy, fluorescence spectroscopy, resonance light scattering technique, fluorescence anisotropy and surface tension measurements. The two porphyrins, meso-tetra(4-hydroxyphenyl)porphyrin (THPP) and meso-tetra(3,5-dibromo-4-hydroxylphenyl)porphyrin (T(DBHP)P), exist as irregular aggregates in aqueous solutions with a broad and low absorption peak near the maximum of monomer peak. The interaction of THPP with AOT leads to the formation of a fluorescent aggregate of porphyrin which was assigned as J-type aggregate according to exciton theory. A long red-shifted Soret band together with a new strong Q-band, a broad emission peak and a sharply peaked resonance light scattering signal are observed for this J-aggregate. The formation of J-aggregate is independent of the initial THPP concentration and can be influenced greatly by ionic strength. The aggregation kinetics has been investigated by UV-vis absorption spectroscopy and fluorescence anisotropy. Conversion of the porphyrin monomers to J-aggregate is observed. The addition of THPP increases the surface tension of solution and changes the critical micelle concentration of AOT. J-aggregate was not observed for T(DBHP)P in AOT solutions which only shows solubilization. The mechanism of aggregation was discussed.
Collapse
Affiliation(s)
- Hongmin Ma
- School of Chemistry & Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Shuting Sun
- School of Chemistry & Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Xin Chen
- School of Chemistry & Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Dan Wu
- School of Chemistry & Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Peihua Zhu
- School of Chemistry & Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Bin Du
- School of Chemistry & Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Qin Wei
- School of Chemistry & Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| |
Collapse
|
33
|
Sampaio RN, Gomes WR, Araujo DMS, Machado AEH, Silva RA, Marletta A, Borissevitch IE, Ito AS, Dinelli LR, Batista AA, Zílio SC, Gonçalves PJ, Barbosa Neto NM. Investigation of Ground- and Excited-State Photophysical Properties of 5,10,15,20-Tetra(4-pyridyl)-21H,23H-porphyrin with Ruthenium Outlying Complexes. J Phys Chem A 2011; 116:18-26. [DOI: 10.1021/jp205963k] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. N. Sampaio
- Instituto de Física, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - W. R. Gomes
- Instituto de Química, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - D. M. S. Araujo
- Instituto de Química, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - A. E. H. Machado
- Instituto de Química, Universidade Federal de Uberlândia, Minas Gerais, Brazil
- Departamento de Química, CAC/UFG, Campus Catalão, Universidade Federal de Goiás, Goiás, Brazil
| | - R. A. Silva
- Instituto de Física, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - A. Marletta
- Instituto de Física, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - I. E. Borissevitch
- Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - A. S. Ito
- Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - L. R. Dinelli
- Faculdade de Ciências Integradas do Pontal, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| | - A. A. Batista
- Departamento de Química, Universidade Federal de São Carlos, São Paulo, Brazil
| | - S. C. Zílio
- Instituto de Física de São Carlos, Universidade de São Paulo, São Paulo, Brazil
| | - P. J. Gonçalves
- Instituto de Física, Universidade Federal de Goiás, Goiás, Brazil
| | - N. M. Barbosa Neto
- Instituto de Física, Universidade Federal de Uberlândia, Minas Gerais, Brazil
| |
Collapse
|
34
|
De Boni L, Franzen PL, Gonçalves PJ, Borissevitch IE, Misoguti L, Mendonça CR, Zilio SC. Pulse train fluorescence technique for measuring triplet state dynamics. OPTICS EXPRESS 2011; 19:10813-23. [PMID: 21643338 DOI: 10.1364/oe.19.010813] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report on a method to study the dynamics of triplet formation based on the fluorescence signal produced by a pulse train. Basically, the pulse train acts as sequential pump-probe pulses that precisely map the excited-state dynamics in the long time scale. This allows characterizing those processes that affect the population evolution of the first excited singlet state, whose decay gives rise to the fluorescence. The technique was proven to be valuable to measure parameters of triplet formation in organic molecules. Additionally, this single beam technique has the advantages of simplicity, low noise and background-free signal detection.
Collapse
Affiliation(s)
- Leonardo De Boni
- Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, 13560-970 São Carlos, SP, Brasil.
| | | | | | | | | | | | | |
Collapse
|
35
|
The influence of positive or negative charges in the passive and iontophoretic skin penetration of porphyrins used in photodynamic therapy. Eur J Pharm Biopharm 2011; 77:249-56. [DOI: 10.1016/j.ejpb.2010.11.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 11/22/2010] [Accepted: 11/23/2010] [Indexed: 01/25/2023]
|
36
|
Maximiano R, Piovesan E, Zílio S, Machado A, de Paula R, Cavaleiro J, Borissevitch I, Ito A, Gonçalves P, Barbosa Neto N. Excited-state absorption investigation of a cationic porphyrin derivative. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2010.06.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
37
|
Effect of protonation on the singlet–singlet excited-state absorption of meso-tetrakis(p-sulphonatophenyl) porphyrin. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.12.067] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
38
|
Gelfuso GM, Figueiredo FV, Gratieri T, Lopez RFV. The effects of pH and ionic strength on topical delivery of a negatively charged porphyrin (TPPS4). J Pharm Sci 2009; 97:4249-57. [PMID: 18240285 DOI: 10.1002/jps.21295] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Meso-tetra-[4-sulfonatophenyl]-porphyrin (TPPS(4)) is a charged porphyrin derivate used in photodynamic therapy (PDT) by parenteral administration. This study means to investigate potential enhancement for its topical delivery by determining the TPPS(4) dependence on the environmental characteristics and applying iontophoresis. In order to accomplish this task, cathodal and anodal iontophoresis as well as passive delivery of the drug were studied in vitro and in vivo in function of its concentration, pH and ionic strength. A reduction in drug concentration as well as the NaCl elimination from donor formulation at pH 2.0 increased TPPS(4) passive permeation through the skin in vitro. Iontophoresis improved TPPS(4) delivery across the skin when applied in solutions containing NaCl at pH 2.0, regardless electrode polarity. However, at pH 7.4, the amount of TPPS(4) permeated by iontophoresis was not different from that one permeated after passive experiments from a solution containing NaCl. Despite the fact that iontophoresis did not improve TPPS(4) transdermal delivery at this specific condition, in vivo experiments showed that 10 min of iontophoresis quickly and homogeneously delivered TPPS(4) to deeper skin layers when compared to passive administration, which is an important condition for topical treatment of skin tumors with PDT.
Collapse
Affiliation(s)
- Guilherme Martins Gelfuso
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | | | | |
Collapse
|
39
|
Cai JH, Huang JW, Zhao P, Zhou YH, Yu HC, Ji LN. Photodegradation of 1,5-dihydroxynaphthalene catalyzed by meso-tetra(4-sulfonatophenyl)porphyrin in aerated aqueous solution. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.06.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
40
|
Kathiravan A, Anbazhagan V, Asha Jhonsi M, Renganathan R. Fluorescence quenching of meso-tetrakis (4-sulfonatophenyl) porphyrin by colloidal TiO(2). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 70:615-8. [PMID: 17888718 DOI: 10.1016/j.saa.2007.08.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2007] [Revised: 08/07/2007] [Accepted: 08/13/2007] [Indexed: 05/17/2023]
Abstract
A stable colloidal TiO(2) has been prepared. The interaction of meso-tetrakis (4-sulfonatophenyl) porphyrin (TSPP) with colloidal TiO(2) was studied by absorption and fluorescence spectroscopy. Upon excitation of its absorption band, the fluorescence emission of TSPP was quenched by colloidal TiO(2). The bimolecular quenching rate constant (k(q)) is 1.78 x 10(11)M(-1)s(-1). The porphyrin can participate in the quenching process by injecting electrons from its excited states into the conduction band of TiO(2). The quenching mechanism is discussed on the basis of the quenching rate constant as well as the reduction potential of the colloidal TiO(2). Rehm-Weller equation was applied for the calculation of free energy change (DeltaG(et)).
Collapse
Affiliation(s)
- A Kathiravan
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India
| | | | | | | |
Collapse
|
41
|
Gonçalves PJ, De Boni L, Borissevitch IE, Zílio SC. Excited state dynamics of meso-tetra(sulphonatophenyl) metalloporphyrins. J Phys Chem A 2008; 112:6522-6. [PMID: 18588273 DOI: 10.1021/jp800589j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The excited state dynamics of Zn2+, Fe3+, and Mn3+ meso-tetra(sulfonatophenyl) porphyrin complexes were investigated with a Z-scan technique at 532 nm using 70 ps and 120 fs single pulses and 200 ns pulse trains of a Q-switched and mode locked laser. We determined the characteristic interconversion and intersystem crossing times, quantum yields of the excited S1 state, and S1 --> Sn and T1 --> Tn transition cross-sections. The ground state cross-sections were obtained using UV-vis absorption spectroscopy, and a five-energy-level diagram was used to yield the photophysical parameters mentioned previously.
Collapse
Affiliation(s)
- P J Gonçalves
- Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, São Carlos, Brazil.
| | | | | | | |
Collapse
|
42
|
Hikal WM, Harmon HJ. Early events in 2,4,6-trinitrotoluene (TNT) degradation by porphyrins: binding of TNT to porphyrin by hydrophobic and hydrogen bonds. JOURNAL OF HAZARDOUS MATERIALS 2008; 154:826-831. [PMID: 18063299 DOI: 10.1016/j.jhazmat.2007.10.098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2007] [Revised: 09/25/2007] [Accepted: 10/29/2007] [Indexed: 05/25/2023]
Abstract
The interaction of meso-tri(4-sulfonatophenyl)mono(4-carboxyphenyl) porphyrin (C1TPP) with 2,4,6-trinitrotoluene (TNT) has been explored by UV-vis and fluorescence spectroscopy. The influence of temperature on the interaction has also been studied. C1TPP binds to TNT at pH 7.0 at room temperature via 1.94 kcal/mole hydrogen bonds with absorbance loss at 412-413 nm and the appearance of a new peak at 422-424 nm. The hydrogen binding of TNT to C1TPP was confirmed by the dissolution of the complex upon the addition of urea. Increasing the temperature results in the appearance of a new absorbance peak at 540 nm and absorbance loss at 515 nm with activation energy of 29.7 kcal/mole in the range of the hydrophobic bond energy. This suggests the hydrophobic bonding of TNT with the pyrrole nitrogens in the porphyrin. Increasing the concentration of the TNT in the solution quenches the fluorescence of the porphyrin following the Stern-Volmer equation. The association constants calculated from absorbance and fluorescence are expectedly similar.
Collapse
Affiliation(s)
- Walid M Hikal
- Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA.
| | | |
Collapse
|
43
|
Luz PP, Neri CR, Serra OA. Dextrin-Microencapsulated Porphyrin: Luminescent Properties. Ann N Y Acad Sci 2008; 1130:91-6. [DOI: 10.1196/annals.1430.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
44
|
Hill MP, Carroll EC, Toney MD, Larsen DS. Rapid photodynamics of vitamin B6 coenzyme pyridoxal 5'-phosphate and its Schiff bases in solution. J Phys Chem B 2008; 112:5867-73. [PMID: 18416573 DOI: 10.1021/jp7117345] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The active form of vitamin B6, pyridoxal 5'-phosphate (PLP), is an important cofactor for numerous enzymes in amine and amino acid metabolism. Presented here is the first femtosecond transient absorption study of free PLP and two Schiff bases, PLP-valine and PLP-alpha-aminoisobutyric acid (AIB), in solution. Photoexcitation of free PLP leads to efficient triplet formation with an internal conversion rate that increases with increasing pH. The measured excited-state kinetics of the PLP-valine Schiff base exhibits a dramatic deuterium dependence as a result of excited-state proton transfer (ESPT) of the Calpha hydrogen in the amino acid substrate. This is consistent with formation of the key reaction carbanionic intermediate (quinonoid), which is resonance stabilized by the electron-deficient, conjugated pi system of the Schiff base/pyridine ring. The transient absorption signals of the PLP-Schiff base with alpha-methylalanine (2-aminoisobutyric acid), which does not have a Calpha proton, lack an observable deuterium effect, verifying ESPT formation of the quinonoid intermediate. In contrast to previous studies, no dependence on the excitation wavelength of the femtosecond kinetics is observed with PLP or PLP-valine, which suggests that a rapid (<250 fs) tautomerization occurs between the enolimine (absorbing at 330 nm) and ketoenamine (absorbing at 410 nm) tautomers in solution.
Collapse
Affiliation(s)
- Melissa P Hill
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, USA
| | | | | | | |
Collapse
|
45
|
Liu ZB, Zhu Y, Zhu YZ, Tian JG, Zheng JY. Study on Nonlinear Spectroscopy of Tetraphenylporphyrin and Dithiaporphyrin Diacids. J Phys Chem B 2007; 111:14136-42. [DOI: 10.1021/jp075472f] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhi-Bo Liu
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School, Nankai University, Tianjin 300457, People's Republic of China, and State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Yan Zhu
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School, Nankai University, Tianjin 300457, People's Republic of China, and State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Yi-Zhou Zhu
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School, Nankai University, Tianjin 300457, People's Republic of China, and State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Jian-Guo Tian
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School, Nankai University, Tianjin 300457, People's Republic of China, and State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Jian-Yu Zheng
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics School, Nankai University, Tianjin 300457, People's Republic of China, and State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| |
Collapse
|
46
|
|
47
|
Kubat P, Lang K, Cígler P, Kozísek M, Matejícek P, Janda P, Zelinger Z, Prochazka K, Kral V. Tetraphenylporphyrin-cobalt(III) bis(1,2-dicarbollide) conjugates: from the solution characteristics to inhibition of HIV protease. J Phys Chem B 2007; 111:4539-46. [PMID: 17425351 DOI: 10.1021/jp066494p] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tetraphenylporphyrin conjugates with one (PB1) and four (PB4) cobalt(III) bis(1,2-dicarbollide) substituents were synthesized and the physicochemical and photophysical properties as well as inhibition of HIV-1 protease were described. In methanol, both PB1 and PB4 were monomeric producing the triplet states and singlet oxygen after excitation. The triplet states of PB4 were quickly protonated. Porphyrins exhibited a small decrease of the quantum yields of the singlet oxygen formation (17% for PB4 and 13% for PB1) as compared with 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin. On the contrary, no singlet oxygen was detected in aqueous solutions because of strong aggregation. Light scattering and atomic force microscopy (AFM) measurements documented that the behavior of aggregates in aqueous solutions is fairly complex and depends on pH, concentration, and aging. The aggregation started from spherical particles in neutral solutions. In acidic solutions, extended aggregation occurred because of slow protonation of the porphyrin pyrrole nitrogen atoms. Both PB1 and PB4 are new representatives of nonpeptide HIV-1 protease inhibitors. Their activity increased with the increasing number of the cobalt(III) bis(1,2-dicarbollide) substituents and was characterized with the IC50 values of 290+/-44 nM for PB1 and 77+/-13 nM for PB4.
Collapse
Affiliation(s)
- Pavel Kubat
- J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejskova 3, 182 23 Praha 8, Czech Republic.
| | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Rahman M, Harmon HJ. Absorbance change and static quenching of fluorescence of meso-tetra(4-sulfonatophenyl)porphyrin (TPPS) by trinitrotoluene (TNT). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 65:901-6. [PMID: 16678476 DOI: 10.1016/j.saa.2006.01.029] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2005] [Revised: 01/13/2006] [Accepted: 01/23/2006] [Indexed: 05/09/2023]
Abstract
Meso-tetra(4-sulfonatophenyl)porphyrin (TPPS) interacts with trinitrotoluene (TNT) and forms a 1:1 complex with a new absorbance peak at 422 nm. TNT quenches TPPS emission intensity at 645 and 702 nm when excited at 413 nm. The TPPS-TNT complex is formed in the ground state on the basis of a linear Stern-Volmer plot indicative of static quenching. The association constants determined from absorbance and fluorescence studies are in excellent agreement.
Collapse
Affiliation(s)
- Mahmudur Rahman
- Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA
| | | |
Collapse
|
49
|
Mhuircheartaigh EMN, Giordani S, Blau WJ. Linear and Nonlinear Optical Characterization of a Tetraphenylporphyrin−Carbon Nanotube Composite System. J Phys Chem B 2006; 110:23136-41. [PMID: 17107155 DOI: 10.1021/jp063562z] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a study of tetraphenylporphyrin composites formed with single-walled carbon nanotubes (SWNTs). Stable porphyrin/SWNT composite solutions were obtained by non-covalent bonding between the carbon nanotubes and conjugated tetraphenylporphyrin molecules. Transmission electron microscopy reveals porphyrin molecules adhering to the nanotube surface. We report on the first complete linear and nonlinear optical characterization of these nanocomposite materials. The composite solutions were found to be superior optical limiters to nanotubes alone, and to all porphyrin systems studied, including metalloporphyrins.
Collapse
|
50
|
Effects of interaction with CTAB micelles on photophysical characteristics of meso-tetrakis(sulfonatophenyl) porphyrin. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2005.12.023] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|