A5026131168- Porphyrin and Phthalocyanine Chemistry
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Coordination Chemistry and Organometallics
- Fullerene Chemistry and Applications
- Luminescence and Fluorescent Materials
- Photochemistry and Electron Transfer Studies
- Photorefractive and Nonlinear Optics
- TiO2 Photocatalysis and Solar Cells
- Asymmetric Synthesis and Catalysis
- Molecular Junctions and Nanostructures
- Photochromic and Fluorescence Chemistry
- Chemical Synthesis and Analysis
- Nanoplatforms for cancer theranostics
- Photonic and Optical Devices
- Electrochemical sensors and biosensors
- Chemical Reactions and Mechanisms
- Photoreceptor and optogenetics research
- Spectroscopy and Quantum Chemical Studies
- Asymmetric Hydrogenation and Catalysis
- Photodynamic Therapy Research Studies
- Energetic Materials and Combustion
- Organic Chemistry Cycloaddition Reactions
- Inorganic and Organometallic Chemistry
Universitat de Miguel Hernández d'Elx
2014-2025
Instituto de Química Orgánica General
2014-2020
Hospital General Universitario de Elche
2014-2020
Universidad Univer
2019
University of Alicante
1996-2014
Osaka University
2008
Japan Science and Technology Agency
2008
Louisiana State University
2007
Phthalocyanines (Pcs) are promising candidates for photon collectors the near-infrared region of solar spectrum in dye cells (DSC). Using two new Pc sensitizers, differing only their Zn or metal-free center, we discuss behaviour dyes as sensitizers DSC, and influence on cell performance, comparison with standard N719 dye, at identical electrolyte conditions. Based separate identification recombination resistance energy levels titania by impedance spectroscopy, determine rates also map...
Graphene exfoliation upon tip sonication in o-dichlorobenzene (o-DCB) was accomplished. Covalent grafting of (2-aminoethoxy)(tri-tert-butyl) zinc phthalocyanine (ZnPc) to exfoliated graphene sheets then achieved. The newly formed ZnPc–graphene hybrid material found be soluble common organic solvents without any precipitation for several weeks. Application diverse spectroscopic techniques verified the successful formation material, while thermogravimetric analysis revealed amount ZnPc loading...
Despite the potential of photodynamic therapy (PDT) in cancer treatment, development efficient and photostable photosensitizing molecules that operate at long wavelengths light has become a major hurdle. Here, we report for first time an Ir(III)-phthalocyanine conjugate (
Photoexcitation of a zinc phthalocyanine−perylenediimide (ZnPc−PDI) dyad and bis(zinc phthalocyanine)−perylenediimide [(ZnPc)2−PDI] triad results in formation the triplet excited state PDI moiety without fluorescence emission, whereas addition Mg2+ ions to long-lived charge-separated (CS) states (ZnPc•+−PDI•−/Mg2+ (ZnPc)2•+−PDI•−/Mg2+) which PDI•− forms complex with Mg2+. Formation CS presence was confirmed by appearance absorption bands due ZnPc•+ PDI•−/Mg2+ time-resolved transient spectra...
Abstract The functionalization of MoS 2 is paramount importance for tailoring its properties towards optoelectronic applications and unlocking full potential. Zinc phthalocyanine (ZnPc) carrying an 1,2‐dithiolane oxide linker was used to functionalize at defect sites located the edges. structure ZnPc‐MoS fully assessed by complementary spectroscopic, thermal, microscopy imaging techniques. An energy‐level diagram visualizing different photochemical events in established revealed a...
Photoexcitation of a zinc phthalocyanine–perylenediimide (ZnPc–PDI) dyad affords the triplet excited state without fluorescence emission, whereas addition Mg2+ to photoexcited ZnPc–PDI results in formation long-lived charge-separated (ZnPc˙+–PDI˙−/Mg2+) which PDI˙− forms complex with Mg2+.
Two Zn−Pc−peptide conjugates bearing either a short linker or long PEG−linker between the macrocycle and bifunctional peptide containing nucleoplasmin HIV-1 Tat 48−60 sequences have been synthesized in order to increase Pc cell-targeting ability evaluate effect of linker. The presence chain increased water solubility and, consequently, its fluorescence aqueous solutions. highest quantum yields were observed at low pH (5.0) for both always higher conjugate Both found dark cytotoxicity toward...
A new ZnPc–PDI dyad presenting for the first time a charge-separated state lower in energy than triplet excited of ZnPc and PDI has been synthesized. The rational design implies substitution with phenoxy groups bay sulfonyl substituents. lifetime was 72 μs.
A fully electronically conjugated phthalocyanine–perylenemonoimidebenzimidazole system has been synthesized, in which the conjugation goes through imide position of perylene.
Orientation and distance‐dependent intervalence charge transfer phenomenon is demonstrated in far‐red capturing zinc phthalocyanine dimers connected by a bis‐acetylene‐phenyl π‐spacer (ortho, meta, or para positions) upon oxidizing one of the rings, resulting split oxidation waves new optical transition near‐infrared region. Optical studies initially probed symmetry‐breaking separation events these wherein solvent polarity‐dependent quenching was witnessed. Interestingly, efficient nonpolar...
Orientation and distance‐dependent intervalence charge transfer phenomenon is demonstrated in far‐red capturing zinc phthalocyanine dimers connected by a bis‐acetylene‐phenyl π‐spacer (ortho, meta, or para positions) upon oxidizing one of the rings, resulting split oxidation waves new optical transition near‐infrared region. Optical studies initially probed symmetry‐breaking separation events these wherein solvent polarity‐dependent quenching was witnessed. Interestingly, efficient nonpolar...
A new procedure for the cosensitization with quantum dots (QDs) and dyes sensitized solar cells is reported here. Cascade of TiO 2 electrodes obtained by sensitization CdS QDs zinc phthalocyanines (ZnPcs), in which ZnPcs containing a sulfur atom are specially designed to produce cascade injection direct attachment QDs. This strategy causes double synergetic interaction. differentiating point comparison other approaches conventional functionalization anchored electrodes. Cosensitization...
The power conversion efficiency of CdSe and CdS quantum dot sensitized solar cells is enhanced by passivation with asymmetrically substituted phthalocyanines. introduction the phthalocyanine dye increases up to 45% for 104% CdS. main mechanism causing this improvement passivation. This study highlights possibilities a new generation dyes designed be directly linked QDs instead TiO2 electrodes.
Dopant-free metal phthalocyanines are viable alternatives to the classical 2,2′,7,7′-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD) in perovskite solar cells (PSCs), due their appealing optoelectrical properties and chemical stability. However, low carrier concentration, transportability, narrow band gap limit application. Here, we designed investigated six innovative asymmetrically substituted (MPcs, M = Zn or Cu), established correlation among electronic...
Abstract The functionalization of MoS 2 is paramount importance for tailoring its properties towards optoelectronic applications and unlocking full potential. Zinc phthalocyanine (ZnPc) carrying an 1,2‐dithiolane oxide linker was used to functionalize at defect sites located the edges. structure ZnPc‐MoS fully assessed by complementary spectroscopic, thermal, microscopy imaging techniques. An energy‐level diagram visualizing different photochemical events in established revealed a...
Abstract Metallo-phthalocyanines ( MPc ) are common photosensitizers with ideal photophysical and photochemical properties. Also, these molecules have shown to interact non-canonical nucleic acid structures, such as G-quadruplexes, modulate oncogenic expression in cancer cells. Herein, we report the synthesis characterisation of two metallo-phthalocyanines containing either zinc ZnPc or nickel NiPc central aromatic core four alkyl ammonium lateral chains. The interaction both G-quadruplex...
A long-lived charge-separated (CS) state of fullerene–trinitrofluorenone linked dyad in which fullerene acts as an electron donor is formed by photoinduced transfer from C60 to TNF the presence Sc(OTf)3; CS lifetime determined 23 ms PhCN at 298 K.
Two phthalocyanines possessing carboxylate groups ((TBA)4H2Pc·1 and (TBA)4H2Pc·2) form 1:2 supramolecular complexes with lithium cation-encapsulated C60 (Li(+)@C60) [H2Pc·1(4-)/(Li(+)@C60)2 H2Pc·2(4-)/(Li(+)@C60)2] in a polar mixed solvent. From the UV-vis spectral changes, binding constants (K) were estimated as ca. 10(12) M(-2). Upon photoexcitation of constructed complexes, photoinduced electron transfer occurred to charge-separated (CS) state. The lifetime CS state was determined be 1.2...
Voltametric sensors formed by the combination of a sulfur-substituted zinc phthalocyanine (ZnPcRS) and gold nanoparticles capped with tetraoctylammonium bromide (AuNPtOcBr) have been developed. The influence nature interaction between both components in response towards catechol has evaluated. Electrodes modified mixture (AuNPtOcBr/ZnPcRS) show an increase intensity peak associated reduction catechol. covalent adduct-both component are linked through thioether bond-(AuNPtOcBr-S-ZnPcR),...
A method to determine the glass transition temperature (Tg) of photorefractive (PR) polymer composites, based on photoconductivity measurements, is proposed. The composite Tg identified as at which a clear change in slope Arrhenius plot representation obtained. We demonstrate that for PR polymers, this more appropriate than one generally used, differential scanning calorimetry (DSC). For composites hole transporting poly(N-vinylcarbazole), value determined from data around 30°C higher...
An asymmetrically substituted zinc phthalocyanine (ZnPc) with a terminal dithiolane group is anchored to Au nanoparticles (NPs) directly or through an interposed silica matrix. Transient absorption spectroscopy shows that the quenching of ZnPc excited state by AuNPs occurs photoinduced electron transfer, efficiency which modulated presence insulating
The synthesis and semiconducting properties of thienyl-triphenylamine tetrasubstituted zinc(<sc>ii</sc>) phthalocyanine its integration as a dopant-free hole transporting material in perovskite solar cells. Competitive performance excellent chemical stability were obtained.
Four symmetrically substituted and four asymmetrically fluorinated non-fluorinated-diarylamine CuPcs ZnPcs have been designed utilized as hole transporting materials in perovskite solar cells.
The synthesis and characterization of different conjugated phthalocyanine–perylenemonoimidebenzimidazole [ZnPc-PBIm(OR)4] nonconjugated phthalocyanine–perylenediimide [ZnPc-PDI(OR)4] dyads are carried out. UV–vis, 1H NMR, electrochemistry measurements reveal the interaction between perylene phthalocyanine moieties in ground state hybrid lack one. Ultrafast transient absorption show that a with substantial charge-transfer character is formed both compounds, but rates for formation...