1
|
Kahveci Z, Vázquez-Guilló R, Mira A, Martinez L, Falcó A, Mallavia R, Mateo CR. Selective recognition and imaging of bacterial model membranes over mammalian ones by using cationic conjugated polyelectrolytes. Analyst 2016; 141:6287-6296. [DOI: 10.1039/c6an01427e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This work describes the use of cationic polyfluorenes as fluorescent markers to selectively recognize bacterial membranes.
Collapse
Affiliation(s)
- Z. Kahveci
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- 03202 Elche
- Spain
| | - R. Vázquez-Guilló
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- 03202 Elche
- Spain
| | - A. Mira
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- 03202 Elche
- Spain
| | - L. Martinez
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- 03202 Elche
- Spain
| | - A. Falcó
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- 03202 Elche
- Spain
| | - R. Mallavia
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- 03202 Elche
- Spain
| | - C. R. Mateo
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- 03202 Elche
- Spain
| |
Collapse
|
2
|
Tena A, Vazquez-Guilló R, Marcos-Fernández A, Hernández A, Mallavia R. Polymeric films based on blends of 6FDA–6FpDA polyimide plus several copolyfluorenes for CO2 separation. RSC Adv 2015. [DOI: 10.1039/c5ra03809j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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
Three emitting copolyfluorenes, based on 2,7-(9,9-dihexyl)fluorene and different aryl groups were blended with a polyimide 6FDA–6FpDA to make gas separation membranes. Their intrinsic fluorescence correlates with their permselectivity.
Collapse
Affiliation(s)
- A. Tena
- Smap UA-UVA_CSIC
- Universidad de Valladolid
- Facultad de Ciencias
- 47071 Valladolid
- Spain
| | - R. Vazquez-Guilló
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- Elche
- Spain
| | - A. Marcos-Fernández
- Smap UA-UVA_CSIC
- Universidad de Valladolid
- Facultad de Ciencias
- 47071 Valladolid
- Spain
| | - A. Hernández
- Smap UA-UVA_CSIC
- Universidad de Valladolid
- Facultad de Ciencias
- 47071 Valladolid
- Spain
| | - R. Mallavia
- Instituto de Biología Molecular y Celular
- Universidad Miguel Hernández
- Elche
- Spain
| |
Collapse
|
3
|
Valente A, Burrows H, Gomes J, Pereira R, Cerqueira D, Jiménez A, Burgos N, Morán C, Mallavia R, Filho G. Cellulose acetate-poly{[9,9-bis(6′-N,N,N-trimethylammonium)hexyl]fluorene-phenylene} bromide blends: Preparation, characterization and transport properties. REACT FUNCT POLYM 2012. [DOI: 10.1016/j.reactfunctpolym.2012.03.014] [Citation(s) in RCA: 3] [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: 11/17/2022]
|
4
|
Tapia M, Monteserín M, Costoyas A, Burrows H, Marques, A, Pais A, Valente A, Mallavia R, Scherf U, Pinazo A, Pérez L, Morán M. Effects of commercial non-ionic alkyl oxyethylene and ionic biocompatible arginine-based surfactants on the photophysical behaviour of several poly(fluorene-1,4-phenylene)s. J Mol Liq 2010. [DOI: 10.1016/j.molliq.2010.05.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
5
|
Pastor I, Salinas-Castillo A, Esquembre R, Mallavia R, Mateo C. Multienzymatic system immobilization in sol–gel slides: Fluorescent superoxide biosensors development. Biosens Bioelectron 2010; 25:1526-9. [DOI: 10.1016/j.bios.2009.10.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 10/16/2009] [Accepted: 10/20/2009] [Indexed: 11/27/2022]
|
6
|
Martínez-Tomé M, Esquembre R, Mallavia R, Mateo C. Development of a dual-analyte fluorescent sensor for the determination of bioactive nitrite and selenite in water samples. J Pharm Biomed Anal 2010; 51:484-9. [DOI: 10.1016/j.jpba.2009.02.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Revised: 02/17/2009] [Accepted: 02/18/2009] [Indexed: 11/27/2022]
|
7
|
Salinas-Castillo A, Camprubí-Robles M, Mallavia R. Synthesis of a new fluorescent conjugated polymer microsphere for chemical sensing in aqueous media. Chem Commun (Camb) 2010; 46:1263-5. [DOI: 10.1039/b918784g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
8
|
Martínez-Tomé MJ, Esquembre R, Mallavia R, Mateo CR. Immobilization and Characterization of 2,3-diaminonaphthalene/cyclodextrin Complexes in a Sol–Gel Matrix: A New Fluorimetric Sensor for Nitrite. J Fluoresc 2008; 19:119-25. [DOI: 10.1007/s10895-008-0393-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2008] [Accepted: 06/20/2008] [Indexed: 10/21/2022]
|
9
|
Molina R, Ramos M, Montilla F, Mateo CR, Mallavia R. A Novel l-Tyrosine Derivative of Poly[(fluoren-2,7-diyl)-alt-co-(benzen-1,4-diyl)]: Strategy of Synthesis and Chiroptical and Electrochemical Characterization. Macromolecules 2007. [DOI: 10.1021/ma062013o] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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)
- R. Molina
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández, Campus de Elche, Edificio Torregaitán, D-0.4, Av. del Ferrocarril, s/n, Elche 03202, Alicante, Spain, and Dpto. de Tecnología Química y Ambiental, Universidad Rey Juan Carlos, 28933 Madrid, Spain
| | - M. Ramos
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández, Campus de Elche, Edificio Torregaitán, D-0.4, Av. del Ferrocarril, s/n, Elche 03202, Alicante, Spain, and Dpto. de Tecnología Química y Ambiental, Universidad Rey Juan Carlos, 28933 Madrid, Spain
| | - F. Montilla
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández, Campus de Elche, Edificio Torregaitán, D-0.4, Av. del Ferrocarril, s/n, Elche 03202, Alicante, Spain, and Dpto. de Tecnología Química y Ambiental, Universidad Rey Juan Carlos, 28933 Madrid, Spain
| | - C. R. Mateo
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández, Campus de Elche, Edificio Torregaitán, D-0.4, Av. del Ferrocarril, s/n, Elche 03202, Alicante, Spain, and Dpto. de Tecnología Química y Ambiental, Universidad Rey Juan Carlos, 28933 Madrid, Spain
| | - R. Mallavia
- Instituto de Biología Molecular y Celular (IBMC), Universidad Miguel Hernández, Campus de Elche, Edificio Torregaitán, D-0.4, Av. del Ferrocarril, s/n, Elche 03202, Alicante, Spain, and Dpto. de Tecnología Química y Ambiental, Universidad Rey Juan Carlos, 28933 Madrid, Spain
| |
Collapse
|
10
|
Abstract
Conjugated phenylene-vinylene polymers are widely used in organic light-emitting and photovoltaic devices. The comprehension of the optical properties upon charge injection is of crucial importance for the improvement of such organoelectronic devices. The processes of electrochemical doping, electrolyte diffusion, and degradation have been studied by cyclic voltammetry and chronoamperometric methods. Kinetic studies by in situ fluorescence spectroscopy have been used for the determination of the mobility of charge carriers in the polymer making used of electrochemical Stern-Volmer analysis. The mobility of holes for MDMO-PPV measured by this method was 2.5 x 10(-7) cm2 V s(-1). Non-Faradic variations of the fluorescence after doping-dedoping cycles have been related to morphological changes in the polymeric layer. The evolution of the fluorescence obeys a first-order kinetics law, similarly to the trend of the variation of volume during gel shrinking.
Collapse
Affiliation(s)
- F Montilla
- Instituto de Biología Molecular y Celular, Universidad Miguel HernAndez, Avda. de la Universidad s/n, Elche (Alicante), Spain E-03202
| | | |
Collapse
|
11
|
Montilla F, Pastor I, Mateo CR, Morallón E, Mallavia R. Charge Transport in Luminescent Polymers Studied by in Situ Fluorescence Spectroscopy. J Phys Chem B 2006; 110:5914-9. [PMID: 16553398 DOI: 10.1021/jp054118j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [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: 11/29/2022]
Abstract
Modulation of the photoluminescence of poly-[2,7-(fluorene)-1,4-(phenylene)] can be attained by reversible electrochemical modification of the conjugated chain (p- or n-doping). Controlled injection of charge quenches the fluorescent emission of the conjugated polymer. The injection of holes completely eliminates the emission, while the electrons only quench up to one-third of the initial fluorescence of the polymer. Analogous quenching effects have been previously reported for solid-state organoelectronic devices. Electrochemical Stern-Volmer plots permit the estimation of the relative mobility of charge carriers in the polymer layer. The mobility of holes is 1 order of magnitude higher that the mobility of electrons, as determined by this method.
Collapse
Affiliation(s)
- F Montilla
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernandez, Avda, de la Universidad s/n E-03202 Elche (Alicante), Spain
| | | | | | | | | |
Collapse
|
12
|
Mallavia R, Montilla F, Pastor I, Velásquez P, Arredondo B, Álvarez AL, Mateo CR. Characterization and Side Chain Manipulation in Violet-Blue Poly-[(9,9-dialkylfluoren-2,7-diyl)-alt-co-(benzen-1,4-diyl)] Backbones. Macromolecules 2005. [DOI: 10.1021/ma0477955] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [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)
- R. Mallavia
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche 03202, Alicante, Spain, Departamento de Ciencia y Tecnología de Materiales, Universidad Miguel Hernández, Elche, 03202 Alicante, Spain, and Departamento de Informática, Estadística y Telemática, Universidad Rey Juan Carlos, Madrid 28933, Spain
| | - F. Montilla
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche 03202, Alicante, Spain, Departamento de Ciencia y Tecnología de Materiales, Universidad Miguel Hernández, Elche, 03202 Alicante, Spain, and Departamento de Informática, Estadística y Telemática, Universidad Rey Juan Carlos, Madrid 28933, Spain
| | - I. Pastor
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche 03202, Alicante, Spain, Departamento de Ciencia y Tecnología de Materiales, Universidad Miguel Hernández, Elche, 03202 Alicante, Spain, and Departamento de Informática, Estadística y Telemática, Universidad Rey Juan Carlos, Madrid 28933, Spain
| | - P. Velásquez
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche 03202, Alicante, Spain, Departamento de Ciencia y Tecnología de Materiales, Universidad Miguel Hernández, Elche, 03202 Alicante, Spain, and Departamento de Informática, Estadística y Telemática, Universidad Rey Juan Carlos, Madrid 28933, Spain
| | - B. Arredondo
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche 03202, Alicante, Spain, Departamento de Ciencia y Tecnología de Materiales, Universidad Miguel Hernández, Elche, 03202 Alicante, Spain, and Departamento de Informática, Estadística y Telemática, Universidad Rey Juan Carlos, Madrid 28933, Spain
| | - A. L. Álvarez
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche 03202, Alicante, Spain, Departamento de Ciencia y Tecnología de Materiales, Universidad Miguel Hernández, Elche, 03202 Alicante, Spain, and Departamento de Informática, Estadística y Telemática, Universidad Rey Juan Carlos, Madrid 28933, Spain
| | - C. R. Mateo
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche 03202, Alicante, Spain, Departamento de Ciencia y Tecnología de Materiales, Universidad Miguel Hernández, Elche, 03202 Alicante, Spain, and Departamento de Informática, Estadística y Telemática, Universidad Rey Juan Carlos, Madrid 28933, Spain
| |
Collapse
|
13
|
Velásquez P, Castañer R, de la Casa-Lillo MA, Sánchez-López MM, Mallavia R, Moreno I, Gutiérrez A, Mateos F. Surface and optical characterization of yttrium hydride films deposited on regular glass to be used as switchable mirrors. SURF INTERFACE ANAL 2002. [DOI: 10.1002/sia.1307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
14
|
Mallavia R, Amat-Guerri F, Fimia A, Sastre R. Synthesis and Evaluation as a Visible-Light Polymerization Photoinitiator of a New Eosin Ester with an O-Benzoyl-.alpha.-oxooxime Group. Macromolecules 2002. [DOI: 10.1021/ma00087a041] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
15
|
|
16
|
Burget D, Fouassier J, Amat-Guerri F, Mallavia R, Sastre R. Enhanced activity as polymerization photoinitiators of Rose Bengal and Eosin esters with anO-benzoyl-α-oxooxime group: The role of the excited state reactivity. ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1521-4044(19990901)50:9<337::aid-apol337>3.0.co;2-i] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
17
|
Blaya S, Carretero L, Mallavia R, Fimia A, Madrigal RF. Holography as a technique for the study of photopolymerization kinetics in dry polymeric films with a nonlinear response. Appl Opt 1999; 38:955-962. [PMID: 18305697 DOI: 10.1364/ao.38.000955] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A method is reported that makes use of holography to study the kinetics of the radical photopolymerization of acrylamide in a polyvinyl alcohol when the Kogelnik theory is applied. A mechanism of unimolecular termination by the radicals that initiate the polymerization reaction is postulated to calculate the quantum yield, the molar-extinction coefficient, the index of refraction, and the thickness of the film. The conversion percentage of monomers is obtained along with the ratio of rate constants of the mechanism of polymerization from the nonlinear fit of the transmittance curves, their angular response, and the temporal evolution of diffraction efficiency. Compared with previous holographic techniques, this method has the advantage of predicting these chemical parameters using all the data points of the temporal diffraction efficiency variation rather than being restricted to the linear zone of these curves. In this way the whole reaction process, not just the initial process, is taken into account.
Collapse
Affiliation(s)
- S Blaya
- Departamento de Ciencias Experimentales y Tecnología, Universidad Miguel Hernández, Campus de Elche Edificio La Galia, Av del Ferrocarril syn Apdo. 03202, Elche Alicante, Spain
| | | | | | | | | |
Collapse
|
18
|
Blaya S, Carretero L, Mallavia R, Fimia A, Madrigal RF, Ulibarrena M, Levy D. Optimization of an acrylamide-based dry film used for holographic recording. Appl Opt 1998; 37:7604-7610. [PMID: 18301597 DOI: 10.1364/ao.37.007604] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A study of the optimization and the characteristics of a dry film photopolymerizable recording material is presented. The effects of intensity, the thickness, and the variation of the concentration of each component have been studied. Diffraction efficiencies of 80%, with energetic sensitivities of 40 mJ/cm(2), have been obtained in photosensitive films of a 35-mum thickness with a spatial frequency of 1000 lines/mm.
Collapse
|
19
|
Carretero L, Blaya S, Mallavia R, Madrigal RF, Beléndez A, Fimia A. Theoretical and experimental study of the bleaching of a dye in a film-polymerization process. Appl Opt 1998; 37:4496-4499. [PMID: 18285901 DOI: 10.1364/ao.37.004496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The quantum efficiency and the molar-absorption coefficients of different phenothiazine dyes are obtained by means of fitting the experimental data of transmittance as a function of time. An analytical expression for the intensity transmitted in a photopolymerizable holographic material is obtained, and good agreement between theory and experience is also achieved. The analysis of these parameters is of fundamental quantities in the photochemical characterization of holographic recording materials.
Collapse
|