A5035589368- Porphyrin and Phthalocyanine Chemistry
- Fullerene Chemistry and Applications
- Carbon Nanotubes in Composites
- Conducting polymers and applications
- Advanced Photocatalysis Techniques
- Graphene research and applications
- Electrocatalysts for Energy Conversion
- Synthesis and Properties of Aromatic Compounds
- Molecular Junctions and Nanostructures
- Iron oxide chemistry and applications
- Electrochemical Analysis and Applications
- Advanced battery technologies research
- Electrochemical sensors and biosensors
- Supercapacitor Materials and Fabrication
- Heusler alloys: electronic and magnetic properties
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Boron and Carbon Nanomaterials Research
- Gas Sensing Nanomaterials and Sensors
- Copper-based nanomaterials and applications
- Organic Electronics and Photovoltaics
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties and Applications
- Iron-based superconductors research
- Advancements in Battery Materials
University of Peshawar
2015-2024
Yangzhou University
2024
Quaid-i-Azam University
2022
Islamic University
2019
Khulna University of Engineering and Technology
2015
Korea Institute of Science and Technology
2010-2013
Korea University of Science and Technology
2010-2013
University of Manitoba
2009-2012
Pohang University of Science and Technology
2010-2012
University of Ulsan
2006-2010
This Account presents recent advances in the design, synthesis, characterization, and potential applications of new hybrid materials based on carbon nanotube electron donors. Fast charge separation slow recombination are consistently observed a variety composites that contain porphyrin derivatives. The ultimate goal using these systems to prepare practical photoelectrochemical devices is discussed, cell with monochromatic efficiency 8.5% conversion light into current illustrated.
This work provides an in-depth look at a range of physicochemical aspects (i) single wall carbon nanotubes (SWNT), (ii) pyrene derivatives (pyrene+), (iii) porphyrin (ZnP8- and H2P8-), (iv) poly(sodium 4-styrenesulfonate), (v) their combinations. Implicit in supramolecular combinations is the hierarchical integration SWNT (as electron acceptors), together with ZnP8- or H2P8- donors), aqueous environment mediated through pyrene+. approach yields novel donor−acceptor nanohybrids...
We describe the functionalization of single-wall carbon nanotubes (SWNTs) with 4-(2-trimethylsilyl)ethynylaniline and subsequent attachment a zinc-phthalocyanine (ZnPc) derivative using reliable Huisgen 1,3-dipolar cycloaddition. The motivation this study was preparation nanotube-based platform which allows facile fabrication more complex functional nanometer-scale structures, such as SWNT−ZnPc hybrid. nanotube derivatives described here were fully characterized by combination analytical...
Carbon nanotubes (CNTs) are known as nano-architectured allotropes of carbon, having graphene sheets that wrapped forming a cylindrical shape. Rolling in different ways makes CNTs either metals or narrow-band semiconductors. Over the years, researchers have devoted much attention to understanding intriguing properties CNTs. They exhibit some unusual like high degree stiffness, large length-to-diameter ratio, and exceptional resilience, for this reason, they used variety applications. These...
A tube for electrons: Through π–π and Coulomb interactions, a complex is obtained between carbon nanotubes grafted with pyrene+ (1) the zinc porphyrin 2. Photoexcitation of resulting donor–acceptor assembly followed by rapid efficient charge separation to generate charge-separated state that lives microseconds. Nanoscale materials (i.e., fullerenes nanotubes) are an attractive platform applications in optoelectronics photovoltaics.1 The presence extended, delocalized π-electron systems makes...
HiPco single-walled carbon nanotubes (SWNTs) have been sidewall-functionalized with phthalocyanine addends following two different approaches: a straightforward Prato reaction N-octylglycine and formyl-containing phthalocyanine, stepwise approach that involves former cycloaddition to the double bonds of SWNTs using p-formyl benzoic acid followed by esterification derivatized an appropriate molecule. The materials obtained these routes comprise carbon/Pc-addenda ratios, as evidenced Raman,...
Licht am Ende des Tunnels: Funktionalisierte einwandige Kohlenstoffnanoröhren mit kovalent oder nichtkovalent gebundenen positiv negativ geladenen Gruppen lagern entgegengesetzt geladene Porphyrin-Derivate an. Werden diese Materialien auf durchsichtige Elektroden aufgebracht (siehe Schema), so erhält man photochemische Bauelemente Umwandlungseffizienzen bis zu 8.5 % für monochromatisches Licht.
Single wall carbon nanotubes (SWNT) and multiwall (MWNT) were linked to thioglycolic acid (TGA)-capped CdTe nanoparticles (NP) through electrostatic interactions producing photoactive superstructures. The novel nanohybrids characterized both in the ground excited states with specific accent on electron-transfer chemistry. In fact, assays provide kinetic spectroscopic evidence that support a partial transfer of charge density, rapid formation microsecond-lived radical ion pair states. Since...
Novel donor-acceptor nanoassemblies (see cover) are prepared using pristine single-walled carbon nanotubes (SWNTs) as electron-acceptor components in supramolecular "polymer wraps", with poly(methyl methacrylate) carrying porphyrin units (H2P) excited-state electron donors Figure). In these novel donor–acceptor ensembles, SWNTs quench the photoexcited H2P chromophores, resulting creation of long-lived radical ion pairs. Supporting information for this article is available on WWW under...
We succeeded in integrating single-wall carbon nanotubes (SWNTs), several water-soluble pyrene derivatives (pyrene-), which bear negatively charged ionic headgroups, and a series of metalloporphyrins (MP8+) into functional nanohybrids through combination associative van der Waals electrostatic interactions. The resulting SWNT/pyrene- SWNT/pyrene-/MP8+ were characterized by spectroscopic microscopic means found to form stable nanohybrid structures aqueous media. A crucial feature our is that...
We show here that La@C72 has a non-IPR cage, unique electronic properties, and high reactivity by the spectroscopic X-ray crystallographic analysis theoretical study. The isolation of as stable derivative might constitute an important stepping-stone on way to these unknown metallofullerenes open new material science metallofullerenes.
Single-wall carbon nanohorns (SWNHs) are a new class of material that is closely related to single-wall nanotubes. Here, we describe the synthesis and characterization series SWNHs functionalized with ethylene glycol chains porphyrins. Functionalization has been achieved using two different synthetic protocols: (1) direct attack free amino group on nanohorn sidewalls (nucleophilic addition) (2) amidation reaction carboxylic functions in oxidized nanohorns. The derivatives have characterized...
Owing to its exciting physicochemical properties and doping–dedoping chemistry, polyaniline (PANI) has emerged as a potential adsorbent for removal of dyes heavy metals from aqueous solution. Herein, we report on the synthesis PANI composites with magnetic oxide (Fe3O4) efficient Basic Blue 3 (BB3) dye PANI, Fe3O4, their were characterized several techniques subsequently applied adsorption BB3. Effect contact time, initial concentration dye, pH, ionic strength behavior systematically...
The first isolation of missing metallofullerene, La@C74, as a derivative is reported. structural determination has been performed by spectroscopic and, finally, X-ray crystallographic analysis, and the properties La@C74 are discussed on basis theoretical study.
Electronically interacting single wall carbon nanotube–porphyrin nanohybrids were confirmed by microscopic and spectroscopic means to exhibit charge transfer features.
A combination of van der Waals and electrostatic interactions was used to integrate SWNT a suitably functionalized polythiophene into nanostructured ITO electrodes. In the resulting electron donor/acceptor nanocomposites, represents light-harvesting chromophore that readily donates an excited-state ground-state electron-accepting SWNT. Upon illumination, monochromatic incident photoconversion efficiencies between 1.2 9.3% were determined for single eight-sandwiched layers, respectively.
Nickel ferrites (NiFe2O4) having rich redox chemistry are regarded as proficient electrocatalysts for sustainable and renewable energy applications. However, its entire potential an electrode material is limited by weak structural characteristics inadequate charge transport qualities. This work reports a series of zinc-substituted inverse spinel (ZnxNi1–xFe2O4) synthesized simple environmentally benign hydrothermal method overall water splitting. The surface morphology, elements, electronic...
Carbon nanotubes are tested as integrative components in multifunctional hybrid photovoltaic cells and reveal their significant promise for applications photochemical energy-conversion systems. As shown the figure, they possess monochromatic power-conversion efficiencies of up to 10.7 % single carbon nanotube/pyrene+/ZnP8– stacks.
Dispersible carbon nanotube/gold nanohybrids have been synthesized (see TEM image). The dispersed (either formed from single-walled or multi-walled nanotubes and thiol-protected gold nanoparticles) give rise to strong electronic coupling, which affects their important physicochemical properties.
Shuttling rules! A bistable fullerene-stoppered molecular shuttle equipped with two ferrocene electron donors on the macrocycle has been prepared. controlled positional change of groups along thread results in different spatial arrangements electroactive units and allows kinetics transfer lifetime charged-separated state to be modulated/fine-tuned (see picture). Supporting information for this article is available WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z605039_s.pdf or from...