El Sayed Shehata Nasr, Sameh; De La Torre, C,; Santos Figueroa, Luis E.; Martínez-Máñez, Ramón; Sancenón Galarza, Félix; Orzáez, M.; Costero, Ana M.; Parra, Margarita; Gil, Salvador(Taylor & Francis, 2015)
[EN] Four probes (i.e. D1¿D4) for the selective and sensitive fluorogenic detection of HS2 have been prepared and characterised.
HEPES (10 mM, pH 7.4)¿DMSO 99:1 v/v solutions of D1¿D4 are essentially non-fluorescent. ...
Essam Elsayed-Moham Okda, Hazem; El Sayed, Sameh; Ferreira, R. Cristina M.; Costa, Susana P.G.; Raposo, M.M.; Martínez-Máñez, Ramón; Sancenón Galarza, Félix(Elsevier, 2018-12)
[EN] The imidazole derivative 4-(4,5-diphenyl-1H-imidazol-2-yl)-N,N-dimethylaniline (probe 1) formed a highly coloured and non-emissive 1:1 stoichiometry complex with Cu(II) in water-acetonitrile 1:1 (v/v) solutions. Among ...
Santos Figueroa, Luis Enrique; De la Torre Paredes, Cristina; El Sayed Shehata Nasr, Sameh; Sancenón Galarza, Félix; Martínez-Máñez, Ramón; Costero Nieto, Ana María; Gil Grau, Salvador; Parra, Margarita(Wiley-VCH Verlag, 2014-03)
A simple chemodosimeter based on a sulfonyl azide dye (1-Az), which displayed a highly selective response toward hydrogen sulfide anion in mixed aqueous media, was synthesised and characterised. Addition of hydrogen sulfide ...
El Sayed Shehata Nasr, Sameh; Pascual Vidal, Lluís; Agostini, Alessandro; Martínez-Máñez, Ramón; Sancenón Galarza, Félix; Costero Nieto, Ana María; Parra Álvarez, Margarita; Gil Grau, Salvador(Wiley Open Access, 2014-08)
The synthesis, characterization and sensing features of a novel
probe 1 for the selective chromogenic recognition of diisopropylfluorophosphate
(DFP), a sarin and soman mimic, in 99:1 (v/
v) water/acetonitrile and in ...
Essam Elsayed-Moham Okda, Hazem; El Sayed, Sameh; Otri, Ismael; Ferreira, Rosa C. M.; Costa, Susana P. G.; Raposo, M. Manuela M.; Martínez-Máñez, Ramón; Sancenón Galarza, Félix(Elsevier, 2019-03)
[EN] A new simple and easy-to-prepare imidazole-based probe 1 was synthesized and used to detect Cu(II) and biothiols (Cys, Hcy and GSH) in aqueous environments. Addition of increasing amounts of Cu(II) to water (pH ...
Pascual, Lluís; El Sayed Shehata Nasr, Sameh; Marcos Martínez, María Dolores; Martínez-Máñez, Ramón; Sancenón Galarza, Félix(John Wiley & Sons, 2017)
[EN] Two different acetylcholinesterase (AChE)-capped mesoporous silica nanoparticles (MSNs), S1-AChE and S2-AChE, were prepared and characterized. MSNs were loaded with rhodamine B and the external surface was functionalized ...
Pascual, Lluís; El Sayed Shehata Nasr, Sameh; Martínez-Máñez, Ramón; Costero Nieto, Ana María; Gil Grau, Salvador; Gaviña Costero, Pablo; Sancenón Galarza, Félix(American Chemical Society, 2016-11-04)
Mesoporous silica nanoparticles loaded with rhodamine B and capped with acetylcholinesterase are able to be selectively opened and deliver their cargo in the presence of nerve agent simulant diisopropyl fluorophosphate (DFP).
Three different mesoporous silica nano-sized materials (SC1, SC2, and SC3), loaded with [Ru(bipy)(3)](2+) dye (bipy= bipyridine) and functionalized on the external surface with three macrocyclic copper(II) complexes (C1, ...
El Sayed Shehata Nasr, Sameh; De la Torre Paredes, Cristina; Santos Figueroa, Luis Enrique; Marín Hernández, Cristina; Martínez Mañez, Ramón; Sancenón Galarza, Félix; Costero Nieto, Ana María; Gil, Salvador; Parra, Margarita(Elsevier, 2015-02)
[EN] Three fluorescent probes (1–3) for the selective and sensitive detection of hydrogen sulfide have been synthesized and characterized. Probe 1 is a coumarin derivative functionalized with an azide moiety whereas 2 ...
[EN] The development of easy and affordable methods for the detection of cyanide is of great significance due to the high toxicity of this anion and the potential risks associated with its pollution. Herein, optical detection ...
[EN] The consumption of illicit drugs has increased exponentially in recent years and has become a problem that worries both governments and international institutions. The rapid emergence of new compounds, their easy ...
El Sayed Shehata Nasr, Sameh; Pascual, Lluís; Licchelli, Maurizio; Martínez-Máñez, Ramón; Gil Grau, Salvador; Costero Nieto, Ana María; Sancenón Galarza, Félix(American Chemical Society, 2016-06-15)
Silica nanoparticles functionalized with thiol reactive units and bulky polar polyamines were used for the selective colorimetric detection of formaldehyde. The reaction of thiols groups in the nanoparticles surface with ...
[EN] CuII-macrocycle functionalized hexametaphosphate-capped silica mesoporous nanoparticles have been prepared and used for the selective and sensitive detection
of hydrogen sulfide in aqueous environments. The possibility ...
El Sayed Shehata Nasr, Sameh; Giménez Morales, Cristina; Aznar Gimeno, Elena; Martínez Mañez, Ramón; Sancenón Galarza, Félix; Licchelli, Maurizio(Royal Society of Chemistry, 2015)
[EN] Mesoporous silica nanoparticles loaded with safranin O and capped with disulfide-containing oligo(ethylene glycol) chains were used for the selective and sensitive fluorimetric detection of glutathione.
Santos Figueroa, Luis Enrique; De la Torre Paredes, Cristina; El Sayed Shehata Nasr, Sameh; Sancenón Galarza, Félix; Martínez-Máñez, Ramón; Costero Nieto, Ana María; Gil Grau, Salvador; Parra, Margarita(Wiley-VCH Verlag, 2014-01)
An anthracene-functionalised cyclam-copper(II) complex for the detection of HS- in aqueous environments has been prepared. This probe displays poor fluorescence but can selectively and sensitively detect HS- anions in water ...
Essam Elsayed Mohamed Okda, Hazem(Universitat Politècnica de València, 2020-03-12)
[EN] This PhD thesis entitled “Novel approaches for the development of chromofluorogenic chemosensors for detection of Cu(II) and biothiols” is devoted to the
synthesis, characterization and coordination behaviour of new ...
Lozano-Torres, Beatriz; El Sayed Shehata Nasr, Sameh; Costero, Ana M.; Gil, Salvador; Parra, Margarita; Martínez-Máñez, Ramón; Sancenón Galarza, Félix(Chemical Society of Japan, 2016-04-15)
[EN] An azopyridine derivative for the selective and sensitive chromogenic detection of trivalent letal cations in water is described.
Lo-Presti, Maria; El Sayed Shehata Nasr, Sameh; Martínez-Máñez, Ramón; Costero, Ana M.; Gil, Salvador; Parra, Margarita; Sancenón Galarza, Félix(The Royal Society of Chemistry, 2016)
[EN] Trivalent cations (Al3+, Fe3+, Cr3+, As3+, In3+ and Ga3+) induced a
dehydration reaction of a chemodosimeter in water that is coupled
with colour and emission changes.
Essam Elsayed Mohamed Okda, Hazem(Universitat Politècnica de València, 2017-02-22)
[EN] A simple chemosensor consisted of an Imidazole derivative (N,N-dimethyl-4-(4,5-di(thiophen-2-yl)-1H-imidazol-2-yl)benzenamine) was synthesized and characterized. The chemosensor 1 showed a selective colorimetric sensing ...