Nm For Excitation Wavelength Research Articles

A Water‐Soluble Fluorescent Probe Derived from Pyridine‐2,6‐Dicarboxylic Acid: Synthesis, Interaction with Ions, and Two‐Photon Microscopy

AbstractTwo‐photon excited fluorescence is a process in which the excited fluorophore relaxes and emits fluorescence after two‐photon absorption. Combined with appropriate two‐photon fluorescent probes, two‐photon microscopy enables observation deep inside tissue without damage. Former reports showed that the two‐photon absorption cross sections of donor–acceptor (D–A) dipoles, as well as D‐π‐D and D–A–D quadrupoles can be strengthened by using strong D–A groups. In this study, a novel water‐soluble fluorescent probe with D‐π‐A structure containing pyridine‐2,6‐dicarboxylic acid unit was synthesized. The maximum excitation wavelength and emission wavelength of the probe in aqueous solution were 328 nm and 471 nm, respectively. The fluorescence emitted by the probe can be quenched by various metal cations. The pyridyl N and carboxyl O in the probe formed chelates with Cu2+, which resulted in a fluorescence quenching response, and showed a linear relationship between fluorescent intensity and Cu2+ concentration with wide linear range and low limit of detection. CCK‐8 tests showed the probe had no obvious toxicity to 4T1 cells in the range of 0.4–50 μmol L−1, and the cell survival rate was above 86 %. The probe had a large two‐photon absorption cross section ranging from 680 nm to 820 nm. The two‐photon absorption cross section reached 100 GM at 760 nm of excitation wavelength. By means of microscopic imaging of 4T1 cells stained with the probe, one‐photon fluorescence represented blue emission, while two‐photon fluorescence represented bright green emission. The probe was proved to have good cell permeability, and preferred to target nucleus, showing application potential in two‐photon fluorescence imaging technology.

Optimizing optical and antimicrobial properties of europium-doped copper sulphate pentahydrate crystal via unidirectional growth and characterization

A Europium-doped Copper Sulphate Pentahydrate crystal was grown using Unidirectional growth method, resulting in a crystal that was 108 mm long. Various characterization methods were employed to investigate its growth, optical, structural, and antimicrobial properties. X-ray Diffraction analysis showed that the crystal belonged to the P1 space group and calculated its corresponding lattice parameters. The band gap of the grown crystal was determined by analysing its response to UV excitation. Fourier transform infrared spectroscopy identified the presence of OH and sulfoxide bond. Surface images of the crystal were taken using the Scanning electron microscope, and EDAX reports confirmed the presence of Europium in the grown crystal. Photoluminescence studies showed the emission peak at 640 nm, and 5D0 to 7FJ (J = 2,3) transition levels were observed in the emission spectrum corresponding to europium ions in the orange-red region using 320 nm of excitation wavelength. Antimicrobial studies were conducted on Eu doped CuSO4·5H2O crystals using two gram-positive, two gram-negative bacteria, and two fungal cultures. The zone of inhibition was measured and found to be 12,12,13.5,14 mm and 16,17 mm for Staphylococcus aureus, Enterococcus Faecalis, Escherichia coli, Klebsiella pneumoniae, and Candida, Aspergillus, respectively. These findings indicate that Eu doped CuSO4·5H2O is a fast-growing crystal that exhibits good quality optical and antimicrobial activity.

Photoluminescence study of Sr3Al32O51:Eu3+ phosphor for Solid state lighting applications

Sr3Al32O51:Eu3+ phosphor prepared successfully by simple combustion method. Prepared matrix synthesized for different percentage of composition for rare earth Eu3+ = (0.5, 1.0, 1.5, 2.0 and 2.5). Photoluminescence property was taken for the given doped phosphor which shows the excitation peak at 395 nm and 466 nm respectively. Emission peak observed at 593 nm and 613 nm for excitation wavelength 395 nm and same emission peak observed for excitation wavelength 466 nm comparatively less intense than 395 nm. The phase of the synthesized phosphor confirmed by X-ray diffraction spectroscopy (XRD), Scanning electron microscopy (SEM), Photoluminescence (Pl) property shows that the given matrix is the one of the potential material which can be used for solid state lightening.

Study of photoluminescence behaviors and Judd-Ofelt analysis of Eu3+ doped double perovskite Ba2GdSbO6 phosphor for highly pure and strong red-light generation

An array of Eu3+ doped Ba2GdSbO6 luminescent materials have been synthesized by the conventional solid-state (high temperature) reaction route. Surface morphology has been studied via Field Emission Scanning Electron Microscopy. The structural and optical behaviors have been studied using X-Ray Diffraction (XRD), FTIR, Raman spectroscopy, Diffuse reflectance spectroscopy, Photoluminescence excitation (PLE), and Photoluminescence emission (PL) spectra. FTIR and Raman's spectra provided the chemical functional group and different vibrational levels within the samples. The calculated optical band gap was 4.40 eV and 4.47eV for pure and optimized samples respectively. Photoluminescence emission curves have been recorded for 245 nm of excitation wavelength and the highest emission peak was focused at 595 nm corresponding to 5D0 → 7F1. Similarly, the Photoluminescence excitation curves were monitored at the emission wavelength of 595 nm and a broad charge transfer band (CTB) was observed from 230 to 285 nm. The emission spectra show the concentration quenching effect beyond the 2 mol% Eu3+ concentration. The corresponding transitions of Eu3+ were further utilized to obtain the Judd-Ofelt (J-O) transition intensity parameters Ωλ (λ = 2, 4) for each sample. Additionally, by studying decay kinetics, the average lifetime of the red emission of the samples has been evaluated, which was 4.622 ms. The photometric study also reveals the CIE coordinates, color purity and CCT values of the proposed phosphor material. Thus, the results obtained from these characterizations, suggest that the prepared sample may behave as a potential candidate in the case of UV-excited red light-emitting phosphor material for light-emitting diodes and field emission devices.

Structural refinement and optical characteristics of single-phase Gd3Al5O12:Er3+ nanophosphors for luminescent applications

Single phase green color emanating Gd3-xAl5O12:xEr3+ (x = 0.01–0.06) nanophosphors have been synthesized through most reliable, environmentally friendly, low temperature based urea assisted gel-combustion process. XRD and Rietveld refinement investigations have confirmed the formation of single phase cubic system with space group Ia-͞3d (230). TEM picture reveals the agglomerated spherical particles of size 18–30 nm. The existence of highly intense band at 278 nm in the excitation spectrum, has confirmed the efficient transfer of energy between Gd3+→Er3+ ions. The emission (PL) spectra, monitored at 278 nm of excitation wavelength show most intensive band at 548 nm which is responsible for the green color of synthesized phosphors. The emission intensity vary with dopant ion concentration and maximum intensity was found at x = 0.03 (optimum concentration). Dipole-dipole interactions between the neighbouring ions are responsible for the quenching of concentration. The chroma-coordinates of the optimized sample (Gd2.97Al5O12:0.03Er3+) are assessed to be 0.314, 0.579 and the analogous correlated color temperature ∼5836.13 K with color purity 91.23% have been calculated. Hence, Gd3-xAl5O12:xEr3+ (x = 0.01–0.06) nanomaterials developed in this work may serve as significant phosphors for luminescent applications.

Excitation of L-valine molecules by electrons and photons.

Excitation of L-valine molecules was studied by optical spectroscopy. Optical emission spectra of the L-valine molecule and optical excitation functions of molecular bands and the Hβ spectral line were measured in the gas phase using electron impact. In the spectra of optical emission in the wavelength range of 250–500 nm, intense emission bands were found at energies of incident electrons of 30, 50 and 70 eV. Analysis of structural features of the valine molecule suggested a fragmentation scheme with the formation of excited particles in collisions with electrons. A notable feature of the presented optical excitation functions is a different growth dynamics with an increase in the energy of exciting electrons and the presence of a number of features and kinks, which are especially pronounced for λ = 305 nm and λ = 311 nm. The excitation thresholds were determined from the initial sections of the excitation functions of the most intense spectral lines by the least-squares method. The photoluminescence spectra of L-valine were measured for the first time on a Shimadzu RF-6000 spectrofluorophotometer in the spectral range of 400–800 nm for excitation wavelengths of 250, 275, 333, 351, and 380 nm.Graphical abstract

Time-resolved and excitation-emission matrix luminescence behaviour of boro-silicate glasses doped with Eu3+ ions for red luminescent application

This paper reports the time-resolved luminescence and excitation-emission matrix (EEM) measurements of three different boro-silicate host glasses doped with Eu3+. The effect of zinc and tellurium oxide addition on the photoluminescence (PL) and time-resolved emission spectra (TRES) of the glasses was also studied. At 392 nm of excitation wavelength, a bright red electric dipole (ED) transition 5D0 → 7F2 (615 nm) and a weak orange magnetic dipole (MD) transition 5D0 → 7F1 (590 nm) were observed. The asymmetric ratio (ED/MD) values were increased in the order Eu < Eu-Zn < Eu-Te. The decay associated spectra (DAS) showed a bright red emission transition (5D0 → 7F2) at 612 nm for all glasses. The time-resolved analysis revealed that, because of the glass network randomness, the luminescence emissions did not present the same lifetime or wavelength for the same transition bands, attributed to different environments (or interactions) experienced by Eu3+ ions in the glass network.

Levofloxacin Detection Using l-Cysteine Capped MgS Quantum Dots via the Photoinduced Electron Transfer Process

Antibiotics resistance is becoming one of the biggest problems of the 21st century. The prior detection of antibiotics resistance can help human beings in better treatment of diseases. Here, we have used l-Cysteine capped magnesium sulfide quantum dots (L-Cyst-MgS QDs) to detect Levofloxacin antibiotic. L-Cyst-MgS QDs were synthesized using the hydrothermal method. Transmission electron microscopy study showed monodispersed L-Cyst-MgS QDs of 2–4 nm in size. Energy dispersive x-ray photoemission spectroscopy study confirmed the elemental composition of the L-Cyst-MgS QDs without any impurity. UV-vis absorption study showed a peak centered around 340 nm. The photoluminescence study exhibited the maximum peak at 410 nm for 340 nm of excitation wavelength. L-Cyst-MgS QDs were studied with thirteen antibiotics, namely Thiamphenicol, Gentamicin, Erythromycin, Ofloxacin, Ampicillin, Ciprofloxacin, Tetracycline, Chloramphenicol, Florfenicol, Amoxicillin, Moxifloxacin, Norfloxacin, and Levofloxacin. Among these, Levofloxacin showed the most significant change in the peaks’ intensity and was further used for the interaction study. In the interaction study, the peak corresponding to MgS showed a continuous decrease, while the peak corresponding to Levofloxacin showed an increase with the increased concentrations (0–100 μg/ml) of Levofloxacin. Linear behavior was obtained in the range of 1–90 μg/ml. FT-IR study confirmed the interaction of the Levofloxacin with L-Cyst-MgS QDs. The Time-resolved fluorescence spectroscopy showed identical lifetime for both the samples and no spectral overlap confirm the FRET free system. The underlying mechanism is explained based on the electron transfer from the conduction band of the L-Cyst-MgS QDs to the HOMO of Levofloxacin. The limit of detection was found to be 0.21 μg/ml.

Synthesis and luminescence study of Gd3+ doped Y6Ba4(SiO4)6F2 phosphors

Abstract Present paper reports the structural and photoluminescence property of Y6Ba4(SiO4)6F2:Gd3+ apatite structured phosphors prepared by conventional solid state reaction method. Structural investigation was done by X-ray diffraction pattern, Scanning Electron microscope(SEM),Energy dispersive spectroscope(EDX) and Fourier Transform Infrared spectroscope(FTIR). X-ray diffraction pattern confirms the formation of Y6Ba4(SiO4)6F2:Gd3+ into apatite structure with space group P63/m . SEM image reveal that the prepared phosphors are agglomerated with rod-like structure. EDX spectra confirms the presence of initial reactant into the prepared phosphors. Photoluminescence emission spectra peaks were obtained at 361 nm and 467 nm for excitation wavelength 275 nm.PL emission peak at 361 nm is due to the transition from 6P7/2 8S7/2 whereas peak at 467 nm is attributed to surface defects.

Indirect Quantification of Glyphosate by SERS Using an Incubation Process With Hemin as the Reporter Molecule: A Contribution to Signal Amplification Mechanism.

The indirect determination of the most used herbicide worldwide, glyphosate, was achieved by the SERS technique using hemin chloride as the reporter molecule. An incubation process between hemin and glyphosate solutions was required to obtain a reproducible Raman signal on SERS substrates consisting of silicon decorated with Ag nanoparticles (Si-AgNPs). At 780 nm of excitation wavelength, SERS spectra from hemin solutions do not show extra bands in the presence of glyphosate. However, the hemin bands increase in intensity as a function of glyphosate concentration. This allows the quantification of the herbicide using as marker band the signal associated with the ring breathing mode of pyridine at 745 cm−1. The linear range was from 1 × 10−10 to 1 × 10−5 M and the limit of detection (LOD) was 9.59 × 10−12 M. This methodology was successfully applied to the quantification of the herbicide in honey. From Raman experiments with and without silver nanoparticles, it was possible to state that the hemin is the species responsible for the absorption in the absence or the presence of the herbicide via vinyl groups. Likewise, when the glyphosate concentration increases, a subtle increase occurs in the planar orientation of the vinyl group at position 2 in the porphyrin ring of hemin over the silver surface, favoring the reduction of the molecule. The total Raman signal of the hemin-glyphosate incubated solutions includes a maximized electromagnetic contribution by the use of the appropriate laser excitation, and chemical contributions related to charge transfer between silver and hemin, and from resonance properties of Raman scattering of hemin. Incubation of the reporter molecule with the analyte before the conjugation with the SERS substrate has not been explored before and could be extrapolated to other reporter-analyte systems that depend on a binding equilibrium process.

Designing of glutathione-lactose derivative for the fabrication of gold nanoclusters with red fluorescence: Sensing of Al3+and Cu2+ ions with two different mechanisms

In this work, a simple and novel glutathione-lactose (GSH-lactose) derivative was synthesized and used as a template for the fabrication of fluorescent gold nanoclusters (GSH-lactose-AuNCs). The synthesized fluorescent GSH-lactose-AuNCs were stable and showed red emission color by irradiating with 365 nm of UV light. At 410 nm of excitation wavelength, the fluorescent GSH-lactose-AuNCs exhibited a strong emission peak at 635 nm. The fluorescent GSH-lactose-AuNCs acted as a fluorescent sensor for the rapid and sensitive detection of two metal ions i.e., Al3+ and Cu2+ ions with different sensing mechanisms such as fluorescence enhancement for Al3+ ion and fluorescence quenching for Cu2+ ion). As a result, the emission peak of GSH-lactose-AuNCs at 635 nm exhibited independent behaviour i.e., a linear enhancement with the addition of Al3+ ion and a linear quenching efficiency with Cu2+ ion. Thus, good linear relationships were noticed between intensity (I and I0/I) over the concentration ranges of 0.075–100 μM for Al3+ ion and of 0.050–100 μM for Cu2+ ion with correlations coefficients of 0.9962 and 0.9964. The detection limits are 12 and 52 nM for Al3+ and Cu2+ ions. The GSH-lactose-AuNCs-based analytical approach was successfully applied to quantify Al3+ and Cu2+ ions in real samples.

Ultrafast preparation of Europium(III) and Terbium(III) activated LaSr2F7 nanoparticles for white LEDs and anti-counterfeiting mark

Tunable color-emitting LaSr2F7 nanoparticle-based phosphor materials with single- or co-doped trivalent rare-earth ions (Eu3+/Tb3+) were synthesized via an ultrafast chemical precipitation technique. When Eu3+ and Tb3+ ions were doped into the LaSr2F7 nanoparticles, the photoluminescence behaviors were investigated and showed characteristic red and green emissions in their respective regions. Under 393 nm excitation, the LaSr2F7:xEu3+ nanoparticles revealed the dominant red emission band (5D0 → 7F1) of Eu3+ ions while the optimum doping concentration was obtained at 0.4 mol, indicating a quantum yield (QY) of 24.5%. Likewise, the LaSr2F7:yTb3+ nanoparticles showed the f-f transition of Tb3+ ions and an intense green-emission peak at 543 nm (5D4 → 7F5) was observed under 352 nm of excitation wavelength and the predominant doping concentration was 0.5 mol and the QY was estimated to be about 33.4%. By increasing the Eu3+ ion concentration in the optimized LaSr2F7:Tb3+ phosphors, the color emissions were turned from yellow to red under 365 nm excitation and the existed energy transfer efficiency in between the Tb3+ and Eu3+ ions was analyzed. Furthermore, the red-, green- and warm white-emitting devices were also fabricated by utilizing the optimal single- and co-doped samples for covering NUV chips. Ultimately, the LaSr2F7:Eu3+ and LaSr2F7:Tb3+ nanoparticles were further applied to a high-security ink for stabile anti-counterfeiting mark.

Synthesis and photoluminescence study of Dy3+ activated SrAl12O19 phosphor

Dy3+ doped SrAl12O19 phosphors, capable of radiating white light, were successfully synthesized via combustion method. Phase identification, morphological observations and elemental examination were done by employing X-ray diffraction, Field emission scanning electron microscopy (FE-SEM) and energy dispersive spectroscopy (EDS). The peaks in the X-ray diffraction patterns are found to be indexed well with the hexagonal phase (JCPDS card number 80-1195). Under 350 nm of excitation wavelength, the PL emission bands were peaking at 478 nm and 573 nm, which can be ascribed to the intra-4f transition of Dy3+. The emission data were analyzed for determining the CIE chromaticity coordinates and the correlated color temperature (CCT). A cool white light with chromaticity coordinates x = 0.3098 and y = 0.3538 and correlated color temperature of 6542 K was achieved for 3 mol% at 350 nm excitation. These results indicate that SrAl12O19:Dy3+ have practical applications in UV-pumped white light emitting diodes.

Micellar spectrofluorimetric protocol for the innovative determination of HCV antiviral (daclatasvir) with enhanced sensitivity: Application to human plasma and stability study

Daclatasvir dihydrochloride (DAC) is a new, direct-acting antiviral drug with powerful inhibitory effect against all hepatitis C virus (HCV) genotypes. A sensitive, simple, fast and specific fluorometric method for estimation of DAC in the presence of sofosbuvir was developed and validated. The method is based on reinforcement the fluorescence intensity of DAC by 170% of its original value in an aqueous solution of hexadecyl trimethyl ammonium bromide (pH 5.5, Teorell and Stenhagen buffer). The fluorescence intensity measurements were accomplished at 387 nm with 328 nm for excitation wavelength. A linear relationship was achieved between the DAC concentration and the fluorescence intensity in a range of 50.0–2000.0 ng ml−1 with 0.9998 and 0.9999 for the determination and correlation coefficients, respectively. The detection and quantitation limits were 13.4, 40.8 ng ml−1, respectively. The excellent sensitivity and specificity of the proposed method allowed the efficient estimation of DAC in real human plasma with adequate recovery (81.78 ± 1.57), and the selective determination for DAC in its commercial dosage form without interference from tablet excipient. Moreover, the proposed method was expanded to examine the stability of DAC by determination the parent drug of DAC in the presence of its oxidative, alkaline, acidic, UV, daylight and sunlight degradations products in agreement with ICH guidelines. Furthermore, the kinetic study of acidic and oxidative degradations of DAC was inspected. In addition, the half-life times of the reaction (t1/2) and the first-order reaction rate constants were estimated. Moreover, a suggestion for the degradation pathway was supposed.

Designing of convenient PCF structure for SERS applications

We investigated that the performance of side-channel photonic crystal fiber (SC-PCF) is controlled by the subtended angle of the liquid channel to the center point of the core (channel angle). This investigation is used for designing the SC-PCF to enhance the Surface Enhanced Raman Spectroscopy (SERS) signal. The deviation of the maximum normalized field intensity from the solid core center, and the mode field diameter change with the channel angle. We used finite element method (FEM) to obtain the normalized field intensity distributions, and a Gaussian approximation with position parameter is utilized to analyze them. The normalized field intensity on core liquid interface and the evanescent field ratio are considered to measure the performance. It is found that the performance is maximized when the channel angle is 90o at 632.8 nm of excitation wavelength. These results are very important for the sensing application in chemical, biomedical engineering and research fields.

Effect of Spin Rate on the Properties of Zn0.98Al0.02O Transparent Films

Zn0.98Al0.02O thinfilms were deposited onto glass substrate through spin coating technique with different chuck rotation rates (rpm’s) and the effect of rpm on their structural, optical and photoluminescence properties were investigated. The structural results confirm the good adhesive nature of the films with glass substrate and formation of hexagonal wurtzite crystal phase with an average crystallite size of 20 nm. Small significant effect on the crystallinity was observed with increase in the chuck rotation speed (rpm), whereas the thickness of the films found to decreases. The optical absorbance and transmittance measurements were recorded in the wavelength range 250 - 1000 nm. Optical studies confirm the films with > 85% transparency in the visible wavelength region were achieved. Photoluminescence (PL) excitation spectra of films were recorded under the emission wavelength of 450 nm. It reveals the distinct peak at 329 nm and it also shows distinct emission peaks at 408, 450, 483 and 530 nm for excitation wavelength of 329 nm and these emission peaks are assigned to the defects induced by the Al3+ substitution.

Synthesis of copper sulfide nanoparticles: pH dependent phase stabilization

Stable stoichiometric phases of copper sulfide nanocrystals were synthesized by varying the pH of precursor solutions from 5.5–9.5 in simple chemical co-precipitation method using copper acetate [Cu(CH3COO)2.H2O] and Sodium thiosulfate Na2S2O3.5H2O as precursors. Phase formation has been confirmed by X-ray diffraction (XRD) which revealed that particles synthesized from solution at 9.5 pH, stabilized in pure covellite phase, at lower pH mixed phases of copper sulfide were obtained. Surface morphology of the nanoparticles probed by Scanning electron microscopy (SEM) show self assembled nanostructures due to agglomeration. Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy are used to confirm the phases Optical band gap of nanopowders prepared at different pH varied from 3.27 eV to 3.66 eV. PL spectra show a broad peak at a wavelength of 470 nm for excitation wavelength of 353 nm.

Fluorescent labelling of DNA on superparamagnetic nanoparticles by a perylene bisimide derivative for cell imaging

N,N'-Bis[tris-(2-aminoethyl) amine]-3,4,9,10-perylenetetracarboxylic diimide (PBI-TRIS), nonfluorescent dye was used to fluorescent labelling of DNA. For this aim, (3-aminopropyl) triethoxysilane (APTS) modified superparamagnetic iron oxide nanoparticles (SPIONs) were synthesized to provide a suitable surface for binding of DNA. Amine functionalized nanoparticles showed a high immobilization capacity (82.70%) at 25mg of nanoparticle concentration for Calf thymus DNA. Binding capacity of PBI-TRIS to DNA-SPION was also found as 1.93μM on 25mg of nanoparticles by using UV-vis spectroscopy. Binding of PBI-TRIS to DNA onto nanoparticles was also characterized by scanning electron microscopy and infrared spectroscopy. The confocal images of PBI-TRIS labelled DNA-SPION and breast cells were taken at 488 and 561.7nm of excitation wavelengths. Cell image was also compared with a commercial dye, DAPI at 403.7nm of excitation wavelength. Results showed that PBI-TRIS can be used for cell staining.

Fluoresence Spectra From Vegetable Oils Using Violet And Blue Ld/Led Exitation And An Optical Fiber Spectrometer

In this article the possibility to detect adulteration of costly olive oils with cheaper vegetable oils using fluorescence spectroscopy is studied. Total luminescence spectra were recorded by measuring the emission spectra in the range 350 nm to 720 nm for excitation wavelengths from 375 nm to 450 nm. Fluorescence spectra of 12 types of olive oil samples were studied. Ten of the olive oil types were purchased locally, while two (samples 1 and 4) were obtained directly from Greek olive oil producers. Analysis of the fatty acid and the tocopherol contents has been performed. Two of the samples exhibit the content of sunflower oils, two are admixtures of sunflower and olive oils, while the remaining eight samples are natural olive oils. The samples show differences in their fluorescence spectra. The latter fact shows that fluorescence spectroscopy can be used for the quick identification of possible adulterations of olive oil, although a more detailed gas chromatographic analysis is needed for the exact quantitative determination of the content of the adulterant.

Porphyrin synthesized from cashew nut shell liquid as part of a novel superparamagnetic fluorescence nanosystem

Magnetic Fe3O4 nanoparticles with average size approximately 11 nm were first oleic acid coated to interact with the meso-porphyrin derivative from CNSL. This procedure produced a novel superparamagnetic fluorescent nanosystem (SFN) linked by van der Waals interactions. This system was characterized by transmission electron microscope, infrared spectroscopy, thermogravimetric analysis, magnetic measurements, UV–Vis absorption, and fluorescence emission measurements. These results showed that SFN has good thermal stability, excellent magnetization, and nanosized dimensions (~13 nm). It exhibited emission peaks at 668 and 725 nm with a maximum emission at 467 nm of excitation wavelength. The type of interaction between porphyrin and magnetic nanoparticles allowed to obtain a material with interesting optical properties which might be used as an imaging agent for contrast in cells as well as heterogeneous photocatalysis.