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Lahoz F, de Armas-Rillo S, Hernández-Rodríguez C, Gil-Rostra J, Yubero F. Optical monitoring of detergent pollutants in greywater. Opt Express 2023; 31:15227-15238. [PMID: 37157630 DOI: 10.1364/oe.466194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Large amount of wastewater is produced by washing machines and dishwashers, which are used in a daily basis. This domestic wastewater generated in households or office buildings (also called greywater) is drained directly to the drainpipes without differentiation from that with fecal contamination from toilets. Detergents are arguably the pollutants most frequently found in greywater from home appliances. Their concentrations vary in the successive stages in a wash cycle, which could be taken into account in a rational design of home appliances wastewater management. Analytical chemistry procedures are commonly used to determine the pollutant content in wastewater. They require collecting samples and their transport to properly equipped laboratories, which hampers real time wastewater management. In this paper, optofluidic devices based on planar Fabry-Perot microresonators operating in transmission mode in the visible and near infrared spectral ranges have been studied to determine the concentration of five brands of soap dissolved in water. It is found that the spectral positions of the optical resonances redshift when the soap concentration increases in the corresponding solutions. Experimental calibration curves of the optofluidic device were used to determine the soap concentration of wastewater from the successive stages of a washing machine wash cycle either loaded with garments or unloaded. Interestingly, the analysis of the optical sensor indicated that the greywater from the last water discharge of the wash cycle could be reused for gardening or agriculture. The integration of this kind of microfluidic devices into the home appliances design could lead to reduce our hydric environmental impact.
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Pérez‐Márquez LA, Perretti MD, García‐Rodríguez R, Lahoz F, Carrillo R. A Fluorescent Cage for Supramolecular Sensing of 3‐Nitrotyrosine in Human Blood Serum. Angew Chem Int Ed Engl 2022; 61:e202205403. [PMID: 35511212 PMCID: PMC9401051 DOI: 10.1002/anie.202205403] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Indexed: 12/26/2022]
Abstract
3‐Nitrotyrosine (NT) is generated by the action of peroxynitrite and other reactive nitrogen species (RNS), and as a consequence it is accumulated in inflammation‐associated conditions. This is particularly relevant in kidney disease, where NT concentration in blood is considerably high. Therefore, NT is a crucial biomarker of renal damage, although it has been underestimated in clinical diagnosis due to the lack of an appropriate sensing method. Herein we report the first fluorescent supramolecular sensor for such a relevant compound: Fluorescence by rotational restriction of tetraphenylethenes (TPE) in a covalent cage is selectively quenched in human blood serum by 3‐nitrotyrosine (NT) that binds to the cage with high affinity, allowing a limit of detection within the reported physiological concentrations of NT in chronic kidney disease.
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Affiliation(s)
- Lidia A. Pérez‐Márquez
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC) Avda. Astrofísico Fco. Sánchez 3 38206 La Laguna Spain
| | - Marcelle D. Perretti
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC) Avda. Astrofísico Fco. Sánchez 3 38206 La Laguna Spain
| | - Raúl García‐Rodríguez
- GIR MIOMeT-IU Cinquima-Química Inorgánica Facultad de Ciencias Campus Miguel Delibes Universidad de Valladolid 47011 Valladolid Spain
| | - Fernando Lahoz
- Departamento de Física, IUdEA Universidad de La Laguna 38200 San Cristóbal de La Laguna Tenerife Spain
| | - Romen Carrillo
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC) Avda. Astrofísico Fco. Sánchez 3 38206 La Laguna Spain
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3
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Pérez-Márquez LA, Perretti MD, García-Rodríguez R, Lahoz F, Carrillo R. A Fluorescent Cage for Supramolecular Sensing of 3‐Nitrotyrosine in Human Blood Serum. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lidia Ana Pérez-Márquez
- Instituto de Productos Naturales y Agrobiología: Instituto de Productos Naturales y Agrobiologia Molecular Sciences SPAIN
| | - Marcelle Dayana Perretti
- Instituto de Productos Naturales y Agrobiología: Instituto de Productos Naturales y Agrobiologia Molecular Sciences SPAIN
| | | | - Fernando Lahoz
- Universidad de La Laguna Facultad de Física: Universidad de La Laguna Facultad de Fisica Departamento de Física SPAIN
| | - Romen Carrillo
- Instituto de Productos Naturales y Agrobiología: Instituto de Productos Naturales y Agrobiologia Ciencias Moleculares Avda. Astrofísico Francisco Sánchez 3 38206 La Laguna SPAIN
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Martins I, Tomás H, Lahoz F, Rodrigues J. Engineered Fluorescent Carbon Dots and G4-G6 PAMAM Dendrimer Nanohybrids for Bioimaging and Gene Delivery. Biomacromolecules 2021. [DOI: https:/doi.org/10.1021/acs.biomac.1c00232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Affiliation(s)
- Ivo Martins
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Helena Tomás
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Fernando Lahoz
- Departamento de Física, IUdEA, Universidad de La Laguna, 38200 San Cristóbal de La Laguna, Tenerife, Spain
| | - João Rodrigues
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- School of Materials Science and Engineering/Center for Nano Energy Materials, Northwestern Polytechnical University, 710072 Xi’an, China
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Martins I, Tomás H, Lahoz F, Rodrigues J. Engineered Fluorescent Carbon Dots and G4-G6 PAMAM Dendrimer Nanohybrids for Bioimaging and Gene Delivery. Biomacromolecules 2021; 22:2436-2450. [PMID: 34009977 DOI: 10.1021/acs.biomac.1c00232] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Carbon dots (CDs) and G4-G6 (polyamidoamine)PAMAM-NH2 dendrimers were self-assembled to produce CDs@PAMAM nanohybrids for transfection and bioimaging purposes. CDs were synthesized by the hydrothermal method, using ascorbic acid as a starting precursor and characterized by transmission electron microscopy, UV-Vis, and fluorescence (in solution and solid-state) techniques. CDs were electrostatically combined with PAMAM dendrimers at room temperature, and the UV-Vis, fluorescence, and NMR spectroscopies were used to confirm the self-assembly. When compared to pristine CDs, nanohybrids were more photostable, resisting high acidic and basic pH. Moreover, they were considerably internalized by cells, as assessed by flow cytometry and fluorescence microscopy, and, when excited, displayed multi-color emission easily quantified and visualized. These nanoscale hybrids, coined hybridplexes, can condense pDNA and transfecting cells successfully, particularly the G5 CDs@PAMAM nanohybrids. In summary, CDs prepared in mild and smooth lab conditions, showing good optical properties, were used to prepare elegantly CDs@PAMAM nanohybrids with promising biomedical applications.
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Affiliation(s)
- Ivo Martins
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Helena Tomás
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Fernando Lahoz
- Departamento de Física, IUdEA, Universidad de La Laguna, 38200 San Cristóbal de La Laguna, Tenerife, Spain
| | - João Rodrigues
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- School of Materials Science and Engineering/Center for Nano Energy Materials, Northwestern Polytechnical University, 710072 Xi'an, China
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de Armas-Rillo S, Fumagallo-Reading F, Luis-Ravelo D, Abdul-Jalbar B, González-Hernández T, Lahoz F. Random Lasing Detection of Mutant Huntingtin Expression in Cells. Sensors (Basel) 2021; 21:3825. [PMID: 34073127 PMCID: PMC8198928 DOI: 10.3390/s21113825] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 11/24/2022]
Abstract
Huntington's disease (HD) is an autosomal dominant, incurable neurodegenerative disease caused by mutation in the huntingtin gene (HTT). HTT mutation leads to protein misfolding and aggregation, which affect cells' functions and structural features. Because these changes might modify the scattering strength of affected cells, we propose that random lasing (RL) is an appropriate technique for detecting cells that express mutated HTT. To explore this hypothesis, we used a cell model of HD based on the expression of two different forms-pathogenic and non-pathogenic-of HTT. The RL signals from both cell profiles were compared. A multivariate statistical analysis of the RL signals based on the principal component analysis (PCA) and linear discriminant analysis (LDA) techniques revealed substantial differences between cells that expressed the pathogenic and the non-pathogenic forms of HTT.
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Affiliation(s)
- Sergio de Armas-Rillo
- Departamento de Física, Instituto Universitario de Estudios Avanzados en Física Atómica, Molecular y Fotónica (IUdEA), Universidad de La Laguna, 38206 Santa Cruz de Tenerife, Spain;
| | - Felipe Fumagallo-Reading
- Departamento de Ciencias Médicas Básicas, Instituto de Tecnologías Biomédicas (ITB), Universidad de La Laguna, 38320 Santa Cruz de Tenerife, Spain; (F.F.-R.); (D.L.-R.); (T.G.-H.)
| | - Diego Luis-Ravelo
- Departamento de Ciencias Médicas Básicas, Instituto de Tecnologías Biomédicas (ITB), Universidad de La Laguna, 38320 Santa Cruz de Tenerife, Spain; (F.F.-R.); (D.L.-R.); (T.G.-H.)
| | - Beatriz Abdul-Jalbar
- Departamento de Matemáticas, Estadística e Investigación Operativa, Universidad de La Laguna, 38206 Santa Cruz de Tenerife, Spain;
| | - Tomás González-Hernández
- Departamento de Ciencias Médicas Básicas, Instituto de Tecnologías Biomédicas (ITB), Universidad de La Laguna, 38320 Santa Cruz de Tenerife, Spain; (F.F.-R.); (D.L.-R.); (T.G.-H.)
| | - Fernando Lahoz
- Departamento de Física, Instituto Universitario de Estudios Avanzados en Física Atómica, Molecular y Fotónica (IUdEA), Universidad de La Laguna, 38206 Santa Cruz de Tenerife, Spain;
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Díaz M, Lobo F, Hernández D, Amesty Á, Valdés-Baizabal C, Canerina-Amaro A, Mesa-Herrera F, Soler K, Boto A, Marín R, Estévez-Braun A, Lahoz F. FLTX2: A Novel Tamoxifen Derivative Endowed with Antiestrogenic, Fluorescent, and Photosensitizer Properties. Int J Mol Sci 2021; 22:ijms22105339. [PMID: 34069498 PMCID: PMC8161337 DOI: 10.3390/ijms22105339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 04/28/2021] [Accepted: 05/08/2021] [Indexed: 11/16/2022] Open
Abstract
Tamoxifen is the most widely used selective modulator of estrogen receptors (SERM) and the first strategy as coadjuvant therapy for the treatment of estrogen-receptor (ER) positive breast cancer worldwide. In spite of such success, tamoxifen is not devoid of undesirable effects, the most life-threatening reported so far affecting uterine tissues. Indeed, tamoxifen treatment is discouraged in women under risk of uterine cancers. Recent molecular design efforts have endeavoured the development of tamoxifen derivatives with antiestrogen properties but lacking agonistic uterine tropism. One of this is FLTX2, formed by the covalent binding of tamoxifen as ER binding core, 7-nitrobenzofurazan (NBD) as the florescent dye, and Rose Bengal (RB) as source for reactive oxygen species. Our analyses demonstrate (1) FLTX2 is endowed with similar antiestrogen potency as tamoxifen and its predecessor FLTX1, (2) shows a strong absorption in the blue spectral range, associated to the NBD moiety, which efficiently transfers the excitation energy to RB through intramolecular FRET mechanism, (3) generates superoxide anions in a concentration- and irradiation time-dependent process, and (4) Induces concentration- and time-dependent MCF7 apoptotic cell death. These properties make FLTX2 a very promising candidate to lead a novel generation of SERMs with the endogenous capacity to promote breast tumour cell death in situ by photosensitization.
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Affiliation(s)
- Mario Díaz
- Departamento Biología Animal, Edafología y Geología, Universidad de La Laguna, 38200 Tenerife, Spain;
- Unidad Asociada ULL-CSIC “Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenerativas y Tumorales”, 38200 Tenerife, Spain; (A.B.); (R.M.); (F.L.)
- Correspondence:
| | - Fernando Lobo
- Programa Agustín de Betancourt, Universidad de la Laguna, 38200 Tenerife, Spain; (F.L.); (Á.A.); (C.V.-B.)
| | - Dácil Hernández
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico F. Sánchez, 38206 Tenerife, Spain;
| | - Ángel Amesty
- Programa Agustín de Betancourt, Universidad de la Laguna, 38200 Tenerife, Spain; (F.L.); (Á.A.); (C.V.-B.)
- Instituto Universitario de Bioorgánica “Antonio González”, Universidad de La Laguna, 38200 Tenerife, Spain;
| | - Catalina Valdés-Baizabal
- Programa Agustín de Betancourt, Universidad de la Laguna, 38200 Tenerife, Spain; (F.L.); (Á.A.); (C.V.-B.)
- Departamento Ciencias Médicas Básicas, Universidad de La Laguna, 38200 Tenerife, Spain;
| | - Ana Canerina-Amaro
- Departamento Ciencias Médicas Básicas, Universidad de La Laguna, 38200 Tenerife, Spain;
| | - Fátima Mesa-Herrera
- Departamento Biología Animal, Edafología y Geología, Universidad de La Laguna, 38200 Tenerife, Spain;
| | - Kevin Soler
- Departamento Física, IUdEA, Universidad de La Laguna, 38200 Tenerife, Spain;
| | - Alicia Boto
- Unidad Asociada ULL-CSIC “Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenerativas y Tumorales”, 38200 Tenerife, Spain; (A.B.); (R.M.); (F.L.)
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico F. Sánchez, 38206 Tenerife, Spain;
| | - Raquel Marín
- Unidad Asociada ULL-CSIC “Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenerativas y Tumorales”, 38200 Tenerife, Spain; (A.B.); (R.M.); (F.L.)
- Departamento Ciencias Médicas Básicas, Universidad de La Laguna, 38200 Tenerife, Spain;
| | - Ana Estévez-Braun
- Instituto Universitario de Bioorgánica “Antonio González”, Universidad de La Laguna, 38200 Tenerife, Spain;
- Departamento Química Orgánica, Universidad de La Laguna, 38200 Tenerife, Spain
| | - Fernando Lahoz
- Unidad Asociada ULL-CSIC “Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenerativas y Tumorales”, 38200 Tenerife, Spain; (A.B.); (R.M.); (F.L.)
- Departamento Física, IUdEA, Universidad de La Laguna, 38200 Tenerife, Spain;
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Martins I, Tomás H, Lahoz F, Rodrigues J. Engineered Fluorescent Carbon Dots and G4-G6 PAMAM Dendrimer Nanohybrids for Bioimaging and Gene Delivery. Biomacromolecules 2021. [DOI: https://doi.org/10.1021/acs.biomac.1c00232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ivo Martins
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Helena Tomás
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Fernando Lahoz
- Departamento de Física, IUdEA, Universidad de La Laguna, 38200 San Cristóbal de La Laguna, Tenerife, Spain
| | - João Rodrigues
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- School of Materials Science and Engineering/Center for Nano Energy Materials, Northwestern Polytechnical University, 710072 Xi’an, China
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Camacho CS, Urgellés M, Tomás H, Lahoz F, Rodrigues J. New insights into the blue intrinsic fluorescence of oxidized PAMAM dendrimers considering their use as bionanomaterials. J Mater Chem B 2020; 8:10314-10326. [PMID: 33146227 DOI: 10.1039/d0tb01871f] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Like other bionanomaterials, dendrimers are usually labelled with fluorescent compounds in order to be optically detected within cells. However, this process can interfere with their biological properties, so it is crucial to find other solutions for their traceability. Here, the blue intrinsic fluorescence of amine-terminated poly(amidoamine) (PAMAM) dendrimers was enhanced using oxidative treatment with ammonium persulfate (APS). The effects of dendrimer generation (G3, G4, and G5) and pH on the spectroscopic behavior of both pristine and APS-treated PAMAM dendrimers were studied in aqueous solution. Overall, the results pointed out that there are at least two types of emitting electron-rich hetero-atomic sub-luminophores (HASLs) confined within the dendrimer scaffold that have very close maximum emission wavelengths and whose emission properties strongly depend on pH. The APS treatment significantly enhanced the fluorescence intensity by leading to the protonation of the interior of the dendrimer. However, fluorescence intensity was not only dependent on the number of HASLs in the dendrimer scaffold (i.e., on dendrimer generation), but also on the rigidification suffered by the dendrimer due to the acidic environment (at low pH values, APS-treated G4 was indeed the most emissive species). Moreover, photoluminescence studies with lyophilized samples were also conducted, which confirmed the coexistence of more than one type of HASLs emitting in the dendrimer structure. The APS treatment affected these HASLs to a different extent. Time-resolved fluorescence experiments always showed higher average lifetimes of HASLs for APS-treated dendrimers than for pristine ones, in accordance with the fluorescence intensity results. On the other hand, the fraction and lifetimes of HASLs in APS-treated dendrimers were similar in solution and the lyophilized form. This behaviour was different for the pristine dendrimers that presented increased luminescence upon aggregation. Finally, the highly emissive oxidized dendrimers were shown not only to be much less cytotoxic and hemotoxic than pristine dendrimers but also to be detectable inside cells upon excitation with UV light.
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Affiliation(s)
- Cláudia S Camacho
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9000-390 Funchal, Portugal.
| | - Marta Urgellés
- Departamento de Física, IUdEA, Universidad de La Laguna, 38200 San Cristóbal de La Laguna, Tenerife, Spain
| | - Helena Tomás
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9000-390 Funchal, Portugal.
| | - Fernando Lahoz
- Departamento de Física, IUdEA, Universidad de La Laguna, 38200 San Cristóbal de La Laguna, Tenerife, Spain
| | - João Rodrigues
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9000-390 Funchal, Portugal.
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Lahoz F, Scholz LE, Boto A, Díaz M. FRET mechanism between a fluorescent breast-cancer drug and photodynamic therapy sensitizers. Spectrochim Acta A Mol Biomol Spectrosc 2020; 239:118498. [PMID: 32470814 DOI: 10.1016/j.saa.2020.118498] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 05/12/2020] [Accepted: 05/16/2020] [Indexed: 06/11/2023]
Abstract
Tamoxifen is one of the most frequently used drugs for the treatment of estrogen receptor positive breast cancer, which is the most prevalent form of hormone dependent breast cancer. A few years ago, we developed a fluorescent derivative of tamoxifen formed by the covalent binding of tamoxifen to a common dye biomarker. The new compound, known as FLTX1, showed the pharmacological activity of the tamoxifen moiety and efficient fluorescence properties, which could be used synergistically to improve the effect of the drug. In this paper, we demonstrate that irradiation at the absorption band of FLTX1 can result in fluorescence resonance energy transfer to photosensitizers such as Rose Bengal and Merocyanine 540, activating the production of reactive oxygen species (ROS). Indeed, the generation of ROS was demonstrated using a colorimetric assay. Since FLTX1 mostly binds estrogen-receptor overexpressing cancer cells, the results obtained are very promising and suggest a new therapeutic strategy combining chemo- and photodynamic therapies.
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Affiliation(s)
- F Lahoz
- Dpto. Física, and IUdEA, Universidad de La Laguna, 38200 La Laguna, Tenerife, Spain; Unidad Asociada ULL-CSIC "Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenetarivas y Tumorales", 38200 La Laguna, Tenerife, Spain.
| | - L E Scholz
- Dpto. Física, and IUdEA, Universidad de La Laguna, 38200 La Laguna, Tenerife, Spain
| | - A Boto
- Instituto de Productos Naturales y Agrobiología, CSIC, 38206 La Laguna, Spain; Unidad Asociada ULL-CSIC "Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenetarivas y Tumorales", 38200 La Laguna, Tenerife, Spain
| | - M Díaz
- Dpto. Biología Animal, Edafología y Geología, Universidad de La Laguna, 38200 La Laguna, Tenerife, Spain; Unidad Asociada ULL-CSIC "Fisiología y Biofísica de la Membrana Celular en Enfermedades Neurodegenetarivas y Tumorales", 38200 La Laguna, Tenerife, Spain
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11
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Camacho CS, Urgellés M, Tomás H, Lahoz F, Rodrigues J. New insights into the blue intrinsic fluorescence of oxidized PAMAM dendrimers considering their use as bionanomaterials. J Mater Chem B 2020. [DOI: https://doi.org/10.1039/d0tb01871f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The fluorescence intensity of oxidized PAMAM dendrimers is not only dependent on the number of HASLs in the dendrimer scaffold (i.e., on dendrimer generation), but also on the rigidification suffered by the dendrimer due to the acidic environment.
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Affiliation(s)
- Cláudia S. Camacho
- CQM – Centro de Química da Madeira
- MMRG
- Universidade da Madeira
- 9000-390 Funchal
- Portugal
| | - Marta Urgellés
- Departamento de Física
- IUdEA
- Universidad de La Laguna
- Tenerife
- Spain
| | - Helena Tomás
- CQM – Centro de Química da Madeira
- MMRG
- Universidade da Madeira
- 9000-390 Funchal
- Portugal
| | - Fernando Lahoz
- Departamento de Física
- IUdEA
- Universidad de La Laguna
- Tenerife
- Spain
| | - João Rodrigues
- CQM – Centro de Química da Madeira
- MMRG
- Universidade da Madeira
- 9000-390 Funchal
- Portugal
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12
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Camacho CS, Urgellés M, Tomás H, Lahoz F, Rodrigues J. New insights into the blue intrinsic fluorescence of oxidized PAMAM dendrimers considering their use as bionanomaterials. J Mater Chem B 2020. [DOI: https:/doi.org/10.1039/d0tb01871f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
The fluorescence intensity of oxidized PAMAM dendrimers is not only dependent on the number of HASLs in the dendrimer scaffold (i.e., on dendrimer generation), but also on the rigidification suffered by the dendrimer due to the acidic environment.
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Affiliation(s)
- Cláudia S. Camacho
- CQM – Centro de Química da Madeira
- MMRG
- Universidade da Madeira
- 9000-390 Funchal
- Portugal
| | - Marta Urgellés
- Departamento de Física
- IUdEA
- Universidad de La Laguna
- Tenerife
- Spain
| | - Helena Tomás
- CQM – Centro de Química da Madeira
- MMRG
- Universidade da Madeira
- 9000-390 Funchal
- Portugal
| | - Fernando Lahoz
- Departamento de Física
- IUdEA
- Universidad de La Laguna
- Tenerife
- Spain
| | - João Rodrigues
- CQM – Centro de Química da Madeira
- MMRG
- Universidade da Madeira
- 9000-390 Funchal
- Portugal
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Déniz M, Pasán J, Rasines B, Lorenzo-Luis P, Lahoz F, Vera-Gonzales C, Julve M, Ruiz-Pérez C. Cadmium(ii) coordination polymers based on substituted malonic acid: synthesis, characterization and photoluminescence properties. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00212b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The influence of the chain length on the topology and luminescence of four new cadmium(ii) R-malonate coordination polymers is analysed herein.
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Affiliation(s)
- Mariadel Déniz
- Laboratorio de Rayos X y Materiales Moleculares (MATMOL)
- Departamento de Física
- Facultad de Ciencias (Sección Física)
- Universidad de La Laguna
- Edificio de Física y Matemáticas
| | - Jorge Pasán
- Laboratorio de Rayos X y Materiales Moleculares (MATMOL)
- Departamento de Física
- Facultad de Ciencias (Sección Física)
- Universidad de La Laguna
- Edificio de Física y Matemáticas
| | - Beatriz Rasines
- Laboratorio de Rayos X y Materiales Moleculares (MATMOL)
- Departamento de Física
- Facultad de Ciencias (Sección Física)
- Universidad de La Laguna
- Edificio de Física y Matemáticas
| | - Pablo Lorenzo-Luis
- Departamento de Química
- Facultad de Ciencias (Sección Química)
- Universidad de La Laguna
- E-38204 La Laguna
- Spain
| | - Fernando Lahoz
- Departamento de Física
- Facultad de Ciencias (Sección Física)
- Universidad de La Laguna
- Edificio de Física y Matemáticas
- E-38200 La Laguna
| | - Corina Vera-Gonzales
- Departamento de Química
- Facultad de Ciencias Naturales y Formales
- Universidad Nacional de San Agustín de Arequipa (UNSA)
- Arequipa
- Peru
| | - Miguel Julve
- Instituto de Ciencia Molecular (ICMol)/Departament de Química Inorgànica
- Universitat de València
- 46980 Paterna
- Spain
| | - Catalina Ruiz-Pérez
- Laboratorio de Rayos X y Materiales Moleculares (MATMOL)
- Departamento de Física
- Facultad de Ciencias (Sección Física)
- Universidad de La Laguna
- Edificio de Física y Matemáticas
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Lahoz F, Martín IR, Gil-Rostra J, Oliva-Ramirez M, Yubero F, Gonzalez-Elipe AR. Portable IR dye laser optofluidic microresonator as a temperature and chemical sensor. Opt Express 2016; 24:14383-14392. [PMID: 27410592 DOI: 10.1364/oe.24.014383] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A compact and portable optofluidic microresonator has been fabricated and characterized. It is based on a Fabry-Perot microcavity consisting essentially of two tailored dichroic Bragg mirrors prepared by reactive magnetron sputtering deposition. The microresonator has been filled with an ethanol solution of Nile-Blue dye. Infrared laser emission has been measured with a pump threshold as low as 0.12 MW/cm2 and an external energy conversion efficiency of 41%. The application of the device as a temperature and a chemical sensor is demonstrated. Small temperature variations as well as small amount of water concentrations in the liquid laser medium are detected as a shift of the resonant laser modes.
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Fernández-González R, Velázquez JJ, Rodríguez VD, Rivera-López F, Lukowiak A, Chiasera A, Ferrari M, Gonçalves RR, Marrero-Jerez J, Lahoz F, Núñez P. Luminescence and structural analysis of Ce3+ and Er3+ doped and Ce3+–Er3+ codoped Ca3Sc2Si3O12 garnets: influence of the doping concentration in the energy transfer processes. RSC Adv 2016. [DOI: 10.1039/c5ra22630a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We present a structural a spectroscopy analysis of Ca3Sc2Si3O12 garnets doped with Ce3+ and Er3+ ions that were synthesized by the freeze-drying precursor method. Efficient energy transfer has been obtained result in an enhanced NIR emission.
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Figueira J, Czardybon W, Mesquita JC, Rodrigues J, Lahoz F, Russo L, Valkonen A, Rissanen K. Synthesis, characterization and solid-state photoluminescence studies of six alkoxy phenylene ethynylene dinuclear palladium(II) rods. Dalton Trans 2015; 44:4003-15. [PMID: 25612106 DOI: 10.1039/c4dt00493k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A rare family of six discrete binuclear [PdCl(PEt3)2] phenylene ethynylene rods with alkoxy side chains (methoxy, ethoxy and heptoxy) have been developed, and their solid-state photoluminescence results have been presented and discussed. The shorter bridging ligands are of the general formula H-C≡C-C6H2(R)2-C≡C-H, where R = H, OCH3, OC2H5, and OC7H15, whereas the longer ones are based on H-C≡C-C6H4-C≡C-C6H2(R)2-C≡C-C6H4-C≡C-H, where R = OCH3, OC2H5. These ligands display increasing length in both the main dimension (backbone length) as well as the number of carbons in the side chains (R, alkoxide side chain) that stem from the central phenylene moiety. The X-ray crystal structures of two of the prepared complexes are reported: one corresponds to a shorter rod, 1,4-bis[trans-(PEt3)2ClPd-C≡C]-2,5-diethoxybenzene (6c), while the second one is associated with a longer rod, the binuclear complex 1,4-bis[trans-(PEt3)2ClPd-4-(-C≡C-C6H4-C≡C)]-2,5-diethoxybenzene (7c). All new compounds were characterized by NMR spectroscopy ((1)H, (13)C{(1)H} and (31)P{(1)H}) as well as ESI-MS(TOF), EA, FTIR, UV-Vis, cyclic voltammetry and solid-state photoluminescence. Our work shows the influence of the alkoxy side chains on the electronic structure of the family of binuclear Pd rods by lowering its oxidation potential. In addition to this, the increase of the length of the bridge results in a higher oxidation potential. Solid state photoluminescence results indicate that Pd complexes are characterized by a marked decrease in both the emission intensity and the fluorescence lifetime values as compared to their ligands. This behaviour could be due to some degree of ligand-to-metal charge transfer.
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Affiliation(s)
- João Figueira
- CQM - Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus Universitário da Penteada, 9000-390 Funchal, Portugal.
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Martín-Ramos P, Coutinho JT, Ramos Silva M, Pereira LCJ, Lahoz F, da Silva PSP, Lavín V, Martín-Gil J. Slow magnetic relaxation and photoluminescent properties of a highly coordinated erbium(iii) complex with dibenzoylmethane and 2,2′-bipyridine. NEW J CHEM 2015. [DOI: 10.1039/c4nj01828a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The luminescence and magnetic properties of a bifunctional highly coordinated Er(iii) β-diketonate complex are presented, together with its synthesis and structure.
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Affiliation(s)
- Pablo Martín-Ramos
- CEMDRX
- Physics Department
- Universidade de Coimbra
- P-3004-516 Coimbra
- Portugal
| | | | | | | | - Fernando Lahoz
- Department of Physics
- MALTA Consolider Team, and Institute of Advances Studies in Atomic, Molecular and Photonics. Universidad de La Laguna
- Santa Cruz de Tenerife
- Spain
| | | | - Víctor Lavín
- Department of Physics
- MALTA Consolider Team, and Institute of Advances Studies in Atomic, Molecular and Photonics. Universidad de La Laguna
- Santa Cruz de Tenerife
- Spain
| | - Jesús Martín-Gil
- Advanced Materials Laboratory
- ETSIIAA
- Universidad de Valladolid
- 34004 Palencia
- Spain
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Martín-Ramos P, Ramos Silva M, Lahoz F, Martín I, Chamorro-Posada P, Eusebio M, Lavín V, Martín-Gil J. Highly fluorinated erbium(III) complexes for emission in the C-band. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.07.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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García-Caballero A, Lahoz F, Cuevas-Diarte MÀ, García-Granda S, Gómez-Sal P, Esteve-Cano V, Pasán J, López de Andrés S, García-Ruiz JM. Crystallization Competition in the School: An innovative teaching/outreach tool. Acta Crystallogr A Found Adv 2014. [DOI: 10.1107/s2053273314089591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The Crystallization Competition in the School is an innovative contest on Crystallography and Crystallization for young students aged 12-16, successfully tried in five yearly editions. During the 2013/2014 school year, the Competition is coordinated by the Specialized Spanish Group of Crystallography and Crystal Growth throughout Spain in seven hosting areas, culminating in a National Final with a selection of the best crystallization projects. Objectives: a) To stimulate scientific vocations amongst secondary school pupils through an enjoyable and enriching activity; b) To explain basic concepts of Crystallography and Crystallization taking advantage of the natural attraction of crystal growth; c) To communicate how researchers work and compete in a scientific environment; d) To bridge the gap between science and society by conveying the importance of Crystallography in everyday life. Development: 1. Training of secondary school teachers (October-November 2013). A number of workshops entitled `Crystallography in the School' are organised to provide school teachers with specific training in Crystallography and Crystallization; 2. Laboratory work and experimental follow-up (December 2013-March 2014). The students grow spectacular large crystals using an innovative crystallization kit of ADP under the guidance of their teachers, while developing a solid understanding of the concepts involved: solubility, supersaturation, nucleation and crystal growth. Students may also develop other crystallization projects related to the formation of geodes, common salt crystallization in its different habits, and crystallization in gels; 3. Intermediate/Regional Finals (April 2014). The best crystallization projects nationwide are selected to present their crystallization projects at the National Final in Madrid; 4. National Final (10 May 2014, headquarters of CSIC). The format is similar to a `Scientific Congress', where the students have to present a crystal model and a poster of their work. * Organized by: GE3C, CSIC and The Crystallization Factory. * Sponsored by: FECYT, MINECO and Triana Science & Technology.
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Toro P, Klahn AH, Pradines B, Lahoz F, Pascual A, Biot C, Arancibia R. Organometallic benzimidazoles: Synthesis, characterization and antimalarial activity. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.06.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Martín-Ramos P, Pereira da Silva PS, Lavín V, Martín IR, Lahoz F, Chamorro-Posada P, Silva MR, Martín-Gil J. Structure and NIR-luminescence of ytterbium(III) beta-diketonate complexes with 5-nitro-1,10-phenanthroline ancillary ligand: assessment of chain length and fluorination impact. Dalton Trans 2013; 42:13516-26. [PMID: 23900403 DOI: 10.1039/c3dt51376a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Seven new tris(β-diketonear-nate)ytterbium(III) complexes with the general formula [Yb(β-diketonate)3(5NO2phen)] (where the β-diketone is either 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione, 4,4,4-trifluoro-1-(2-furyl)-1,3-butanedione, 1,1,1-trifluoro-2,4-pentanedione, 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione, 1,1,1,5,5,6,6,7,7,7-decafluoro-2,4-heptanedione, 2,4-hexanedione or 2,6-dimethyl-3,5-heptanedione, and 5NO2phen = 5-nitro-1,10-phenanthroline) were synthesized and characterized by elemental analysis, attenuated total reflectance Fourier transform infrared spectroscopy and photoluminescence spectroscopy. Single crystal X-ray structures have been determined for three fluorinated complexes and ground state geometries of the other four complexes have been predicted using the Sparkle/PM6 model. These experimental structures and those designed by semi-empirical models reveal octacoordination around the Yb(3+) ion. Photoluminescence studies and lifetime measurements show that the increase in the fluorinated β-diketonate chain length is associated with a decrease in Yb(3+) luminescence intensity of the (2)F5/2→(2)F7/2 transition at around 980 nm and the (2)F5/2 excited state lifetime, while the ligand lifetime value remains almost unaffected. Finally, fluorination of the ligands is only advised when the complexes are to be used for co-doping with isostructural Er(3+) complexes for optical amplifiers, since it leads to a slight decrease in luminescence intensity for the same β-diketonate chain length.
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Affiliation(s)
- Pablo Martín-Ramos
- Dpto. de Teoría de la Señal y Comunicaciones e IT, ETSIT, Universidad de Valladolid, Campus Miguel Delibes, Paseo Belén 15, 47011 Valladolid, Spain
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22
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Marrero-Alonso J, Morales A, García Marrero B, Boto A, Marín R, Cury D, Gómez T, Fernández-Pérez L, Lahoz F, Díaz M. Unique SERM-like properties of the novel fluorescent tamoxifen derivative FLTX1. Eur J Pharm Biopharm 2013; 85:898-910. [PMID: 23727370 DOI: 10.1016/j.ejpb.2013.04.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 04/09/2013] [Accepted: 04/30/2013] [Indexed: 11/17/2022]
Abstract
Tamoxifen is a selective estrogen receptor modulator extensively used on estrogen receptor-positive breast cancer treatment. However, clinical evidences demonstrate the increased incidence of undesirable side effects during chronic therapies, the most life threatening being uterine cancers. Some of these effects are related to tissue-dependent estrogenic actions of tamoxifen, but the exact mechanisms remain poorly understood. We have designed and synthesized a novel fluorescent tamoxifen derivative, FLTX1, and characterized its biological and pharmacological activities. Using confocal microscopy, we demonstrate that FLTX1 colocalizes with estrogen receptor α (ERα). Competition studies showed that FLTX1 binding was totally displaced by unlabeled tamoxifen and partially by estradiol, indicating the existence of non-ER-related triphenylethylene-binding sites. Ligand binding assays showed that FLTX1 exhibits similar affinity for ER than tamoxifen. FLTX1 exhibited antiestrogenic activity comparable to tamoxifen in MCF7 and T47D cells transfected with 3xERE-luciferase reporter. Interestingly, FLTX1 lacked the strong agonistic effect of tamoxifen on ERα-dependent transcriptional activity. Additionally, in vivo assays in mice revealed that unlike tamoxifen, FLTX1 was devoid of estrogenic uterotrophic effects, lacked of hyperplasic and hypertrophic effects, and failed to alter basal proliferating cell nuclear antigen immunoreactivity. In the rat uterine model of estrogenicity/antiestrogenicity, FLTX1 displayed antagonistic activity comparable to tamoxifen at lower doses, and only estrogenic uterotrophy at the highest dose. We conclude that the fluorescent derivative FLTX1 is not only a suitable probe for studies on the molecular pharmacology of tamoxifen, but also a potential therapeutic substitute to tamoxifen, endowed with potent antiestrogenic properties but devoid of uterine estrogenicity.
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Affiliation(s)
- Jorge Marrero-Alonso
- Departamento de Biología Animal, Universidad de La Laguna, Tenerife, Spain; Instituto Canario de Investigación del Cáncer (ICIC), Spain
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Lahoz F, Oton CJ, López D, Marrero-Alonso J, Boto A, Díaz M. Whispering gallery mode laser based on antitumor drug-dye complex gain medium. Opt Lett 2012; 37:4756-4758. [PMID: 23164903 DOI: 10.1364/ol.37.004756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Optofluidic lasers have emerged as a new research field over the past few years. Most frequently they use conventional dye molecules as the gain medium. In this Letter, we demonstrate a laser emission produced by the coupling of the evanescent whispering gallery modes that resonate in a cylindrical microresonator to a newly developed gain medium. This medium is formed by attachment of a 7-nitrobenzo [c] [1,2,5]-oxadiazol-4-yl fluorescent tag to tamoxifen, the most widely used drug in the treatment of breast cancer. The antitumor character of the gain medium paves the way to novel biophotonic applications.
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Affiliation(s)
- Fernando Lahoz
- Departamento Física Fundamental y Experimental, Electrónica y Sistemas, Universidad de La Laguna, La Laguna 38206, Spain.
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Kösterke T, Kösters J, Würthwein EU, Mück-Lichtenfeld C, Schulte to Brinke C, Lahoz F, Hahn FE. Synthesis of Complexes Containing an Anionic NHC Ligand with an Unsubstituted Ring-Nitrogen Atom. Chemistry 2012; 18:14594-8. [DOI: 10.1002/chem.201202973] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Indexed: 11/07/2022]
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Déniz M, Pasán J, Fabelo O, Cañadillas-Delgado L, Lorenzo-Luis P, Lahoz F, López D, Yuste C, Julve M, Ruiz-Pérez C. Synthesis, structural analysis, and thermal and spectroscopic studies of methylmalonate-containing zinc(II) complexes. CR CHIM 2012. [DOI: 10.1016/j.crci.2012.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Carmona D, Viguri F, Asenjo A, Lamata MP, Lahoz F, Garcı́a-Orduña P, Oro LA. Enantioselective Catalysts for the Diels–Alder Reaction between Methacrolein and Cyclopentadiene Based on the Chiral Fragment (η5-C5Me5)M(chiral diphosphane) (M = Rh, Ir). Organometallics 2011. [DOI: 10.1021/om200859z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel Carmona
- Instituto de Sı́ntesis Quı́mica y Catálisis
Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna
12, 50009 Zaragoza, Spain
| | - Fernando Viguri
- Instituto de Sı́ntesis Quı́mica y Catálisis
Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna
12, 50009 Zaragoza, Spain
| | - Ainara Asenjo
- Instituto de Sı́ntesis Quı́mica y Catálisis
Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna
12, 50009 Zaragoza, Spain
| | - M. Pilar Lamata
- Instituto de Sı́ntesis Quı́mica y Catálisis
Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna
12, 50009 Zaragoza, Spain
| | - Fernando Lahoz
- Instituto de Sı́ntesis Quı́mica y Catálisis
Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna
12, 50009 Zaragoza, Spain
| | - Pilar Garcı́a-Orduña
- Instituto de Sı́ntesis Quı́mica y Catálisis
Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna
12, 50009 Zaragoza, Spain
| | - L. A. Oro
- Instituto de Sı́ntesis Quı́mica y Catálisis
Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna
12, 50009 Zaragoza, Spain
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Pasán J, Belmar J, Quezada J, Jiménez CA, Lahoz F, Hernández-Creus A, Julve M, Ruiz-Pérez C. Multifunctional Gd III5-core nanoparticles directed by alkylnitrosopyrazolones. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311083826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Lahoz F, Oton CJ, Capuj N, Ferrer-González M, Cheylan S, Navarro-Urrios D. Reduction of the amplified spontaneous emission threshold in semiconducting polymer waveguides on porous silica. Opt Express 2009; 17:16766-16775. [PMID: 19770893 DOI: 10.1364/oe.17.016766] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Hybrid organic-inorganic monomode waveguides of conjugated polymers on porous silicon (PS) substrates have been fabricated. Different low refractive index PS substrates, varying from 1.46 down to 1.18 have been studied. Amplified spontaneous emission (ASE) has been observed for all the samples and the ASE threshold has been monitored as a function of the PS refractive index. A decrease in the ASE threshold is detected when the PS refractive index decreases. These results have been analysed in the frame of a four level waveguide amplifier model and the theoretical predictions are in agreement with the experimental data.
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Affiliation(s)
- Fernando Lahoz
- Departamento Física Fundamental y Experimental, Electrónica y Sistemas-Instituto Universitario de Estudios Avanzados en Física Molecular, Atómica y Fotónica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain.
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Abstract
Currently Er(3+)-doped fluorides are being used as upconversion phosphors to enhance the efficiency of Si solar cells, to our knowledge. However, this enhancement is strongly limited owing to the small solar spectral range around 1540 nm that is used. We demonstrate that Ho(3+)-doped oxyfluoride glass ceramics are adequate to enlarge the Si sub-bandgap region around 1170 nm that can be transformed into higher-energy photons, showing an upconversion efficiency 2 orders of magnitude higher than the precursor glass. As these materials are transparent at 1540 nm, they can be used complementarily with Er(3+)-doped phosphors for the same purpose.
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Affiliation(s)
- Fernando Lahoz
- Departamento Fisica Fundamental y Experimental, Electronica y Sistemas-Instituto Universitario de Estudios Avanzados en Fisica Molecular, Atomica y Fotonica, University of La Laguna, Tenerife, Spain.
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Lahoz F, Martin IR, Mendez-Ramos J, Nunez P. Dopant distribution in a Tm(3+)-Yb(3+) codoped silica based glass ceramic: an infrared-laser induced upconversion study. J Chem Phys 2006; 120:6180-90. [PMID: 15267504 DOI: 10.1063/1.1652016] [Citation(s) in RCA: 146] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The optically active dopant distribution in a Tm(3+)-Yb(3+) doped silica based glass ceramic sample has been investigated. A systematic analysis of the upconversion fluorescence of the Tm(3+)-Yb(3+) codoped glass and glass ceramic has been performed at room temperature. Tm(3+) and Yb(3+) single doped glass and glass ceramics have also been included in the study. Upon infrared excitation at 790 nm into the (3)H(4) level of the Tm(3+) ions a blue upconversion emission is observed, which is drastically increased in the Yb(3+) codoped samples. A rate equation model confirmed the energy transfer upconversion mechanism. Based on these results, the temporal dynamic curves of the levels involved in the upconversion process, (3)H(4), (2)F(5/2), and (1)G(4) were interpreted in the glass ceramic samples. The contribution of the optically active Tm(3+) and Yb(3+) ions in the crystalline and in the vitreous phase of the glass ceramic was distinguished and the ratio of Tm(3+) ions in the crystalline phase could be quantified for the 1 mol % Tm(3+)-2.5 mol % Yb(3+) glass ceramic. A surprising result was obtained for that concentration: the main contribution to the upconversion emission of the glass ceramic is due to Tm(3+)-Yb(3+) ions in the vitreous phase.
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Affiliation(s)
- F Lahoz
- Departamento de Fisica Fundamental y Experimental, Electronica y Sistemas, University of La Laguna, 38206 La Laguna, Tenerife, Spain.
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Cámpora J, Ortiz de la Tabla L, Palma P, Álvarez E, Lahoz F, Mereiter K. Synthesis and Catalytic Activity of Cationic Allyl Complexes of Nickel Stabilized by a Single N-Heterocyclic Carbene Ligand. Organometallics 2006. [DOI: 10.1021/om060439l] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Juan Cámpora
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla, c/Americo Vespucio, 49, 41092 Sevilla, Spain, Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pza. San Francisco S/N, Zaragoza, Spain, and Department of Chemistry, Vienna University of Technology, Getreidemarkt 9/164SC, Vienna, Austria
| | - Laura Ortiz de la Tabla
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla, c/Americo Vespucio, 49, 41092 Sevilla, Spain, Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pza. San Francisco S/N, Zaragoza, Spain, and Department of Chemistry, Vienna University of Technology, Getreidemarkt 9/164SC, Vienna, Austria
| | - Pilar Palma
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla, c/Americo Vespucio, 49, 41092 Sevilla, Spain, Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pza. San Francisco S/N, Zaragoza, Spain, and Department of Chemistry, Vienna University of Technology, Getreidemarkt 9/164SC, Vienna, Austria
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla, c/Americo Vespucio, 49, 41092 Sevilla, Spain, Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pza. San Francisco S/N, Zaragoza, Spain, and Department of Chemistry, Vienna University of Technology, Getreidemarkt 9/164SC, Vienna, Austria
| | - Fernando Lahoz
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla, c/Americo Vespucio, 49, 41092 Sevilla, Spain, Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pza. San Francisco S/N, Zaragoza, Spain, and Department of Chemistry, Vienna University of Technology, Getreidemarkt 9/164SC, Vienna, Austria
| | - Kurt Mereiter
- Instituto de Investigaciones Químicas, CSIC-Universidad de Sevilla, c/Americo Vespucio, 49, 41092 Sevilla, Spain, Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pza. San Francisco S/N, Zaragoza, Spain, and Department of Chemistry, Vienna University of Technology, Getreidemarkt 9/164SC, Vienna, Austria
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Díez J, Albertí P, Ripoll G, Lahoz F, Fernández I, Olleta J, Panea B, Sañudo C, Bahamonde A, Goyache F. Using machine learning procedures to ascertain the influence of beef carcass profiles on carcass conformation scores. Meat Sci 2006; 73:109-15. [DOI: 10.1016/j.meatsci.2005.11.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2005] [Revised: 10/28/2005] [Accepted: 11/17/2005] [Indexed: 11/28/2022]
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Lahoz F, Martin I, Shepherd D, Wilkinson J, Hassan M. Room temperature infrared-laser-induced upconversion in Nd3+ doped Ta2O5 waveguides. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.01.076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Albertí P, Ripoll G, Goyache F, Lahoz F, Olleta J, Panea B, Sañudo C. Carcass characterisation of seven Spanish beef breeds slaughtered at two commercial weights. Meat Sci 2005; 71:514-21. [DOI: 10.1016/j.meatsci.2005.04.033] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2004] [Revised: 03/07/2005] [Accepted: 04/22/2005] [Indexed: 10/25/2022]
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Álvarez E, García JM, Rubio E, García MI, Ortiz C, Lahoz F. X-ray structure of a mixed spiroketal-xylylene macrocyclic receptor. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305088112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Cuesta-Herranz J, Figueredo E, Pastor C, Vidarte L, Vivanco F, Heras MDL, Sastre J, Lahoz F. IgE binding components in biologically quantified melon extract. J Allergy Clin Immunol 2002. [DOI: 10.1016/s0091-6749(02)82076-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sebastian I, Chilliard Y, Purroy A, Jaime C, Flechet J, Lahoz F, Morago E. Supplémentation en céréales, état corporel et enzymes lipogéniques du tissu adipeux chez la brebis Aragonesa. ACTA ACUST UNITED AC 1993. [DOI: 10.1051/animres:19930305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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39
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Antiñolo A, Jalón FA, Otero A, Fajardo M, Chaudret B, Lahoz F, López JA. Reactivity of ruthenium and niobium trihydrides with gold fragments. Crystal structure of the hexanuclear raft cluster [Au3Nb3(µ-H)6(η-C5H4SiMe3)6]. ACTA ACUST UNITED AC 1991. [DOI: 10.1039/dt9910001861] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Antinolo A, Burdett JK, Chaudret B, Eisenstein O, Fajardo M, Jalon F, Lahoz F, Lopez JA, Otero A. Preparation, X-ray crystal and electronic structure of the novel raft cluster [NbAuH2{C5H4(SiMe3)}2]3. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/c39900000017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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He XD, Chaudret B, Lahoz F, Lopez JA. Facile preparation, characterization, and X-ray crystal structure of [Ru3{µ3-η7-C5Me3(CH2)2}(µ3-O)(µ2-H)(η5-C5Me5)2(η2-SO4)], a high–valent hydrido–oxo cluster of ruthenium. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/c39900000958] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Robles NR, Lobos JM, Seguido P, Lahoz F. [Tolerance to delayed-action nifedipine]. Med Clin (Barc) 1989; 92:438. [PMID: 2725101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Lobos JM, Bernáldez R, Lahoz F, Seguido P. [Nocturnal snoring and sleep apnea syndrome]. Aten Primaria 1989; 6:198-9. [PMID: 2518921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Castellanos Maroto J, Lahoz F, Seguido P, Lobos JM. [HIV infection in patients without apparent risk factors]. Aten Primaria 1989; 6:131-2. [PMID: 2519768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Arliguie T, Chaudret B, Jalon F, Lahoz F. Unexpected dehydrogenation of a cyclohexyl group at low temperature through protonation of RuH3(η5-C5Me5)(PCy3)(Cy = cyclohexyl). X-Ray structure of [(η5-C5Me5)Ru{(C6H9)P(C6H11)}2]BF4. ACTA ACUST UNITED AC 1988. [DOI: 10.1039/c39880000998] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Seguido P, Hidalgo MA, Lobos JM, Lahoz F, García-Perea A, Conthe P. [Predictive value of rapid antigenic technics in the diagnosis of acute streptococcal pharyngitis]. Med Clin (Barc) 1987; 89:405-6. [PMID: 2446088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Abstract
We describe a patient with pulmonary ceroid histiocytosis. Skin pigmentation, chest x-ray film and laboratory findings were normal. Only pulmonary function tests were abnormal (TLC = 63 percent, DLco = 52 percent). Based on these functional data, the patient was submitted to a lung biopsy by thoracotomy. Brown pigmented histiocytes were shown occupying alveolar spaces. Similar brown pigmented hepatocytes were seen in the liver biopsy.
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Bernal Estévez F, Bravo Bravo JL, Rami Porta R, Aroca González M, Alix Trueba A, Lahoz F, Serrano Muñoz F. [Pulmonary hypoplasia. Apropos of a case]. Rev Clin Esp 1984; 173:57-60. [PMID: 6739900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Sastre Castillo A, Verea H, Lahoz F, Pérez Guerrero J, Vallejo J. [Hereditary angioedema by defict of C1 esterase. Our experience in 8 cases]. Allergol Immunopathol (Madr) 1979; 7:141-6. [PMID: 313695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Eight cases of hereditary angioedema, all of them with low values of C1-sterase inhibitor are analyzed. In 7 cases the C3 and C4 components of the complement were assessed; the results showed marked descent of C4. The 8 patients came from 4 different families; only 2 of them were males. Six patients presented digestive disorders, reporting colic pain, nausea and vomiting. In 1 of them the abdominal picture was the only evidence of the disease. In 5 patients the angioedema episodes occurred following traumatisms and in 3 because of emotional states. The duration of the attacks varied from several hours to six days. There was a familial history in all cases. Three of the patients had repeated episodes of pharyngolaryngeal angioedema, two of them requiring emergency tracheotomy because of suffocating crisis. Six patients were treated with Epsilon aminocaproic acid (16 to 20 gr daily) or with tranexamic acid (1 to 3 gr. daily). In 4 cases the results were excellent with either of these antifibrinolytic drugs. No side effects were observed in the tranexamic acid therapy whilst they were frequent in the treatment with Epsilon aminocaproic acid.
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