In TiO2-based dye-sensitized nanocrystalline solar cells, efficiencies of up to 11% have been obtained using Ru dyes, but the limited availability these dyes together with their undesirable environmental impact led search for cheaper and safer organic-based dyes. this Letter, we report synthesis, electronic, photovoltaic properties novel green porphyrin sensitizers. All six give cell ≥5%, best performing dye under standard global AM 1.5 conditions gives a short circuit photocurrent density...

Abstract Conducting polymers (CPs) have exciting potential as scaffolds for tissue engineering, typically applied in regenerative medicine applications. In particular, the electrical properties of CPs has been shown to enhance nerve and muscle cell growth regeneration. Hydrogels are particularly suitable candidates engineering because their hydrated nature, biocompatibility, tissue‐like mechanical properties. This study reports development first single component CP hydrogel that is combine...

Electrochemical conversion of CO2 into CO using metal complex/carbon-based heterogenized hybrids can be both highly efficient and selective. The ways in which the molecular complexes are immobilized on carbon substrates participate electrocatalytic reactions that yield reduction not always well-understood. In this work, a soluble sterically hindered cobalt(II) octaalkoxyphthalocyanine was successfully chemically converted graphene via π–π stacking. comparison to an analogous cobalt...

Porphyrin molecules offer immense potential as the light harvesting component of dye-sensitised nanocrystalline TiO2 solar cells. Synthetic porphyrin dyes were amongst first trialled for sensitisation inorganic semiconducting oxides. Today, they exhibit best performance reported Accompanying significant improvement over last two decades is a much improved understanding efficiency-determining fundamental electron transfer steps, from charge photogeneration to recombination. In this feature...

Zn−Zn porphyrin dimers have been incorporated into thin dye-sensitized solar cells (DSSCs) to boost their light harvesting efficiency. The photoexcited show efficient and fast electron injection TiO2 indicating that both chromophores contribute current generation. improved ability coupled enhanced DSSC performance demonstrates the potential of 3-D arrays as next generation harvesters for artificial energy conversion systems.

A 3D iron porphyrin/graphene hydrogel electrocatalyst affords highly efficient, durable and selective CO₂ reduction to CO at a low overpotential.

The growing need to develop surfaces able effectively resist biological fouling has resulted in the widespread investigation of nanomaterials with potential antifouling properties. However, preparation effective coatings is limited by availability reactive surface functional groups and our ability carefully control organize chemistries at a materials' interface. Here, we present two methods preparing hydrophilic low-fouling through reaction silica-nanoparticle suspensions predeposited films...

Abstract Developing immobilized molecular complexes, which demonstrate high product efficiencies at low overpotential in the electrochemical reduction of CO 2 aqueous media, is essential for practical production products. In this work, a simple and facile self‐assembly method demonstrated by electrostatic interaction π–π stacking fabrication porphyrin/graphene framework (FePGF) composed Fe(III) tetraphenyltrimethylammonium porphyrin reduced liquid crystalline graphene oxide that can be...

An electroactive nitrospiropyran-substituted polyterthiophene, poly(2-(3,3′′-dimethylindoline-6′-nitrobenzospiropyranyl)ethyl 4,4′′-didecyloxy-2,2′:5′,2′′-terthiophene-3′-acetate), has been synthesized for the first time. The spiropyran, incorporated into polymer backbone by covalent attachment to alkoxyterthiophene monomer units, leads multiple colored states as a result of both photochemical and electrochemical isomerization spiropyran moiety merocyanine forms well oxidation...

Electron lifetime and diffusion coefficient measurements in highly efficient porphyrin-sensitised TiO(2) solar cells showed reduced electron lifetime, consequently, lower photo-induced density under illumination compared to commonly used ruthenium dye (N719)-sensitised cells, which is proposed be the origin of generally open circuit voltage.

We report electron injection dynamics for a series of porphyrin sensitized nanocrystalline TiO2 films, comparing zinc and free base porphyrins with conjugated or nonconjugated linker group to the carboxylate binding group. Injection are measured used time correlated single photon counting, using dye ZrO2 control films. These molecular orbital calculations, electrochemical data device photocurrent efficiencies. The dynamics, overall efficiency is found be increased by conjugation use central...

Ionic liquid electrolytes based on a number of imidazolium, quaternary ammonium and phosphonium cations have been developed for porphyrin dye sensitised solar cells yielding efficiencies up to 5.2% at 0.68 Sun.

We report here the design of a novel conducting erodible platform based on water soluble polymer, poly[ammonium(3-thienyl)ethoxypropanesulfonate] (SPT). This study shows for first time polymeric system that is electroactive, fully and promotes cell adhesion growth.

Abstract Poly(styrene‐β‐isobutylene‐β‐styrene)‐poly(3‐hexylthiophene) (SIBS‐P3HT) conducting composite fibers are successfully produced using a continuous flow approach. Composite stiffer than SIBS and able to withstand strains of up 975% before breaking. These exhibit interesting reversible mechanical electrical characteristics, which applied demonstrate their strain gauging capabilities. This will facilitate potential applications in sensing or elastic electrodes. Here, the fabrication...

A new mechanism of charge photogeneration is demonstrated for the first time, based on organic molecular structures. This intermediate band approach, integrated into a dye-sensitised solar cell configuration shown to generate charges upon illumination with low energy photons. Specifically 610 nm photoexcitation Pt porphyrins, through series transfer steps and triplet-triplet annihilation, excites higher absorption onset molecule, which then capable injection TiO2. Transient measurements...

The controlled movement of a chemical container by the light-activated expulsion fuel, named here "photo-chemopropulsion", is an exciting new development in array mechanisms employed for controlling microvehicles, herein represented lipid-based microdroplets. This "chemopropulsion" effect can be switched on and off, fully reversible. As service to our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may re-organized online...

Abstract The emulation of the complex cellular and bacterial vesicles used to transport materials through fluids has potential add revolutionary capabilities fluidic platforms. Although a number artificial motile or microdroplets have been demonstrated previously, control over their movement in liquid 3D not achieved. Here it is shown that by adding chemical “fuel,” photoactive material, droplet, can be moved any direction (3D) water using simple light sources without need for additives...

Inexpensive and earth abundant copper complexes are popular choices to catalyze the electrochemical conversion of carbon dioxide (CO2) into value-added products. Cu have been applied in homogeneous catalysis dissolved solutions or heterogeneous immobilized on electrode surfaces. The aim this review is examine correlations between ligand structures CO2 reduction product selectivity both applications. This covers nine main categories grouped by their structures, enabling comparisons among...

Organic mixed ionic–electronic conductors (OMIECs) are being explored in applications such as bioelectronics, biosensors, energy conversion and storage, optoelectronics. OMIECs largely composed of conjugated polymers that couple ionic electronic transport their structure well synthetic flexibility. Despite extensive research, previous studies have mainly focused on either enhancing ion conduction or enabling modification. This limited the number excel both domains. Here, a series based...

Four novel nanographene/porphyrin hybrids were prepared, characterized, and probed in solar energy conversion schemes. Exfoliation of graphite by means immobilizing four different porphyrins onto the basal plane graphene is accompanied distinct electronic interactions both ground excited states. In state, a strong loss oscillator strength goes hand-in-hand with notable broadening porphyrin transitions and, as such, attests to shift electron density from donating nanographene. nearly...

A novel regiospecific MDMO−PPV copolymer has been synthesized by the copolymerization of mixture 70 wt % 1-(chloromethyl)-5-[(3,7-dimethyloctyl)oxy]-2-methoxy-4-[(octylsulfoxy)methyl]benzene (monomer A) and 30 1-(chloromethyl)-2-[(3,7-dimethyloctyl)oxy]-5-methoxy-4-[(octylsulfoxy)methyl]benzene B) via sulfinyl precoursor synthetic route. The hole mobility new polymer (also called OC1C10−PPV) measured with a time-of-flight setup is found to be factor ∼3.5 higher at all electric fields room...

We present two sensitizers, Ru(4,4′-dicarboxyvinyl)-2,2′-bipyridine)(4,4′-dinonyl-2,2′-bipyridine)(NCS)2 (K9) and Ru(4,4′-dicarboxy(phenylethenyl)-2,2′-bipyridine)(4,4′-dinonyl-2,2′-bipyridine)(NCS)2 (K23), which were synthesized characterized by analytical, spectroscopic, electrochemical impedance measurements. The sensitizers that contain hydrophobic alkyl chains an extended π-conjugation bridge between carboxylic acid groups the ruthenium chromophore center exhibit enhanced red response...

The determination of the orientation and molecular density for several porphyrin dyes adsorbed on planar TiO(2) surfaces using X-ray reflectometry (XRR) is reported. Adsorption nanoscale water layers occurred rapidly upon exposure freshly prepared to ambient conditions; however, this was successfully eliminated, resulting in clearly discernible dye sensitized surfaces. Adsorbed orientations, determined from computations constrained by measured layer thickness, were calculated have a binding...

Exfoliation of graphite was achieved using a free-base porphyrin 1 resulting in an efficient fabrication single-layer nanographene (NG)–1 hybrid platelets that can be further functionalized with other nanomaterials. The novel nanographene–porphyrin hybrids reveal charge transfer the excited state.