Structural Studies of Aliphatic Substituted Phthalocyanine−Lipid Multilayers

Zarbakhsh, Ali; Campana, Mario; Mills, David; Webster, John R. P.

doi:10.1021/la102876r

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…The LB technique (see Figure ) has been widely used for the deposition of mono- or multilayers of amphiphilic molecules onto solid substrates. − This method relies on the fact that, when spread on a water surface, amphiphilic molecules take on a particular orientation with their hydrophilic side facing the water and their hydrophobic side facing upward (see Figure ). The end result is a highly oriented monolayer of the sample at the air–water interface.…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic Protein Complexes as Bio-photovoltaic Building Blocks Retaining a High Internal Quantum Efficiency

et al. 2014

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Photosynthetic compounds have been a paradigm for biosolar cells and biosensors and for application in photovoltaic and photocatalytic devices. However, the interconnection of proteins and protein complexes with electrodes, in terms of electronic contact, structure, alignment and orientation, remains a challenge. Here we report on a deposition method that relies on the self-organizing properties of these biological protein complexes to produce a densely packed monolayer by using Langmuir-Blodgett technology. The monolayer is deposited onto a gold electrode with defined orientation and produces the highest light-induced photocurrents per protein complex to date, 45 μA/cm(2) (with illumination power of 23 mW/cm(2) at 880 nm), under ambient conditions. Our work shows for the first time that a significant portion of the intrinsic quantum efficiency of primary photosynthesis can be retained outside the biological cell, leading to an internal quantum efficiency (absorbed photon to electron injected into the electrode) of the metal electrode-protein complex system of 32%.

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Section: Introductionmentioning

confidence: 99%

Photosynthetic Protein Complexes as Bio-photovoltaic Building Blocks Retaining a High Internal Quantum Efficiency

et al. 2014

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“…MPCs, which are related to hemoglobin and chlorophyll, provide a wide range of remarkable applications in catalysis, drug development, sensor technology, dyeing, electrolysis, electrocatalysis, photovoltaics, semiconduction, and photodynamic therapy (PDT), among others. It is known that MPCs have abundant redox chemistry, and the phthalocyanine ligand and metal ions in the PCs’ core cavity are responsible for their redox peaks. − Because of possessing good chemical and thermal stabilities, it is broadly used in diverse technological fields, by monitoring MPC with choice of substituent at periphery and metal ions at inner core ensure desired target applications. − Electrode modification with MPCs enhances electron-transfer reactions; CoTM-OPc was utilized since central cobalt metals containing MPCs are known to exhibit high catalytic activity in support of a variety of processes. − …”

Section: Introductionmentioning

confidence: 99%

Electrochemical, Ultrasensitive, and Selective Detection of Nitrite and H₂O₂: Novel Macrostructured Phthalocyanine with Composite MWCNTs on a Modified GCE

et al. 2023

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In the current study, the synthesis of tetra-4-(2-methoxyphenoxy) carboxamide cobalt(II) amide-bridged phthalocyanine (CoTMePhCAPc) is described, as well as its characterization by Fourier transform infrared (FT-IR), UV–visible, and mass spectroscopy; powder X-ray diffraction (PXRD); thermogravimetric analysis (TGA); scanning electron microscopy (SEM); and electrochemistry. Sensing of nitrite (NO2 –) and hydrogen peroxide (H2O2) simultaneously was done on CoTMePhCAPc with the composite multiwalled carbon nanotube (MWCNT)-modified glassy carbon electrode (CoTMePhCAPc/MWCNT/GCE) in the range of linear absorption (NO2 – and H2O2: CV 50–750, differential pulse voltammetry (DPV) 50–750, CA 50–500 nmol L–1), lower detection limit (NO2 – and H2O2: CV 10.5 and 12.5, DPV 10.5 and 11.2, CA 6.0 and 5.5 nmol L–1), and sensitivity (NO2 – and H2O2: CV 0.379 and 0.529, DPV 0.043 and 0.049, CA 0.033 and 0.040 μA nM–1 cm–2). The composite electrode exhibits improved electrocatalytic behavior compared to modified electrodes for nitrite and H2O2. The CoTMePhCAPc/MWCNT/GCE sensor displays good selectivity even in the presence of an excess of interfering metal ions and biomolecules at the applied potentials of +400 mV (nitrite) and −400 mV (H2O2). Moreover, the fabricated sensor was studied with various phosphate-buffered saline (PBS) (pH 5–9) electrolyte solutions. The unknown H2O2 concentration in blood samples and apple juice and nitrite concentration in drinking water and butter leaf lettuce were all measured using the usual addition method. Docking analysis clearly indicates that the ligand shows excellent inhibition activity toward the three subjected protein molecules.

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“…INTRODUCTION In many applications exploiting the electronic, 1 energy harvesting, 2 spintronic, 3 and bio-sensing 4 properties of multi-component structures based on conjugated organic conductors, the performance-limiting factor is often the energy band alignment at hetero-interfaces. For example, organic photovoltaics depend on a band edge discontinuity to dissociate the excitons generated by light absorption and this interface parameter is not always reliably predicted theoretically or using bulk material properties.…”

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confidence: 99%

Transport and optical gaps and energy band alignment at organic-inorganic interfaces

Evans¹,

Vearey-Roberts²,

Roberts³

et al. 2013

Journal of Applied Physics

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Evans, D. A., Vearey-Roberts, A. R., Roberts, O. R., Williams, G. T., Cooil, S. P., Langstaff, D. P., Cabailh, G., McGovern, I. T., Goss, J. P. (2013). Transport and optical gaps and energy band alignment at organic-inorganic interfaces. Journal of Applied Physics, 114 (12), [123701]The transport and optical band gaps for the organic semiconductor tin (II) phthalocyanine (SnPc) and the complete energy band profiles have been determined for organic-inorganic interfaces between SnPc and III-V semiconductors. High throughput measurement of interface energetics over timescales comparable to the growth rates was enabled using in situ and real-time photoelectron spectroscopy combined with Organic Molecular Beam Deposition. Energy band alignment at SnPc interfaces with GaAs, GaP, and InP yields interface dipoles varying from -0.08 (GaP) to -0.83 eV (GaAs). Optical and transport gaps for SnPc and CuPc were determined from photoelectron spectroscopy and from optical absorption using spectroscopic ellipsometry to complete the energy band profiles. For SnPc, the difference in energy between the optical and transport gaps indicates an exciton binding energy of (0.6 +- 0.3) eV.publishersversionPeer reviewe

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Structural Studies of Aliphatic Substituted Phthalocyanine−Lipid Multilayers

Cited by 3 publications

References 13 publications

Photosynthetic Protein Complexes as Bio-photovoltaic Building Blocks Retaining a High Internal Quantum Efficiency

Photosynthetic Protein Complexes as Bio-photovoltaic Building Blocks Retaining a High Internal Quantum Efficiency

Electrochemical, Ultrasensitive, and Selective Detection of Nitrite and H₂O₂: Novel Macrostructured Phthalocyanine with Composite MWCNTs on a Modified GCE

Transport and optical gaps and energy band alignment at organic-inorganic interfaces

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Structural Studies of Aliphatic Substituted Phthalocyanine−Lipid Multilayers

Cited by 3 publications

References 13 publications

Photosynthetic Protein Complexes as Bio-photovoltaic Building Blocks Retaining a High Internal Quantum Efficiency

Photosynthetic Protein Complexes as Bio-photovoltaic Building Blocks Retaining a High Internal Quantum Efficiency

Electrochemical, Ultrasensitive, and Selective Detection of Nitrite and H2O2: Novel Macrostructured Phthalocyanine with Composite MWCNTs on a Modified GCE

Transport and optical gaps and energy band alignment at organic-inorganic interfaces

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Electrochemical, Ultrasensitive, and Selective Detection of Nitrite and H₂O₂: Novel Macrostructured Phthalocyanine with Composite MWCNTs on a Modified GCE