نتایج جستجو برای: phthalocyanine based catalysts

تعداد نتایج: 2962729  

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1999
ahmad ahaabani farzad bahadoran ayoob bazgir naser safari

phthalocyanine complexes of cu, co, ni, fe, zn, pd, pt and ru have been synthesized from reaction between phthalonitrile and proper metal salts upon exposure to microwave irradiation under solvent-free conditions and considerably reduced reaction times.

Journal: :Journal of Physical Chemistry C 2021

The intermolecular interaction among phthalocyanine molecules deposited on Ag(111) has been investigated at submonolayer coverages. By means of infrared absorption spectroscopy and spot-profile analysis low-energy electron diffraction, unambiguous evidence for an attractive between neighboring titanyl-phthalocyanine (TiOPc) is found dilute layers, which in contrast to the repulsion reported cop...

Journal: :The journal of physical chemistry. B 2007
Rudi Berera Ivo H M van Stokkum Gerdenis Kodis Amy E Keirstead Smitha Pillai Christian Herrero Rodrigo E Palacios Mikas Vengris Rienk van Grondelle Devens Gust Thomas A Moore Ana L Moore John T M Kennis

We present results from transient absorption spectroscopy on a series of artificial light-harvesting dyads made up of a zinc phthalocyanine (Pc) covalently linked to carotenoids with 9, 10, or 11 conjugated carbon-carbon double bonds, referred to as dyads 1, 2, and 3, respectively. We assessed the energy transfer and excited-state deactivation pathways following excitation of the strongly allow...

Journal: :Journal of Catalysis 2022

Molecular hybrid catalysts, such as cobalt(II) phthalocyanine (CoPc) complexes anchored to multi-walled carbon nanotubes (MWCNTs), provide selective CO2 conversion toward CO with high current densities, exceeding 0.1 A cm?2 in microfluidic or zero-gap (membrane) electrolyzers. However, the practicality of electroreduction is essentially determined by catalyst stability against mechanical and (e...

2008
Branko N. Popov

Synthesize carbon-based metal-free catalysts and • carbon-composite catalysts for oxygen reduction reaction (ORR). Optimize catalytic active reaction sites as a function • of carbon support, surface oxygen groups, nitrogen content, surface modifiers, pyrolysis temperature, porosity, and the concentration of the non-metallic additive “X” in the catalyst matrix. Evaluate catalyst stability under ...

Journal: :Physical chemistry chemical physics : PCCP 2015
Luke A Rochford Alexandra J Ramadan D Phil Woodruff Sandrine Heutz Tim S Jones

The growth and characterisation of a non-planar phthalocyanine (vanadyl phthalocyanine, VOPc) on a complete monolayer (ML) of a planar phthalocyanine (Iron(II) phthalocyanine, FePc) on an Au(111) surface, has been investigated using ultra-high vacuum (UHV) scanning tunnelling microscopy (STM) and low energy electron diffraction (LEED). The surface mesh of the initial FePc monolayer has been det...

2011

In this study we present the effect of elevated temperatures from 300K to 400K on the electrical properties of copper Phthalocyanine (CuPc) based organic field effect transistors (OFET). Thin films of organic semiconductor CuPc (40nm) and semitransparent Al (20nm) were deposited in sequence, by vacuum evaporation on a glass substrate with previously deposited Ag source and drain electrodes with...

Journal: :Chemical reviews 2003
Harald Gröger

3.1. Overview 2807 3.2. Chiral Aluminum(III) Complexes as a Catalyst 2808 3.2.1. Aluminum(III)-Salen-Based Catalysts 2808 3.2.2. Aluminum(III)-Binaphthol-Based Catalysts 2810 3.3. Chiral Titanium(IV) Complexes as a Catalyst 2814 3.3.1. Titanium(IV)-Peptide-Based Catalysts 2814 3.3.2. Titanium(IV)-Diol-Based Catalysts 2817 3.4. Chiral Zirconium(IV) Complexes as a Catalyst 2818 3.4.1. The Catalyt...

Journal: :The Journal of chemical physics 2011
Cristina Isvoranu Jan Knudsen Evren Ataman Karina Schulte Bin Wang Marie-Laure Bocquet Jesper N Andersen Joachim Schnadt

The adsorption of ammonia on multilayers of well-ordered, flat-lying iron phthalocyanine (FePc) molecules on a Au(111) support was investigated by x-ray photoelectron spectroscopy. We find that the electron-donating ammonia molecules coordinate to the metal centers of iron phthlalocyanine. The coordination of ammonia induces changes of the electronic structure of the iron phthalocyanine layer, ...

2012
Daniel J Tate Rémi Anémian Richard J Bushby Suwat Nanan Stuart L Warriner and Benjamin J Whitaker

It has been shown that the base-initiated cyclo-oligomerisation of phthalonitriles is favoured by bulky α-substituents making it possible to obtain the metal-free phthalocyanine directly and in high yield. The phthalocyanine with eight α-isoheptyl substituents gives a high time-of-flight hole mobility of 0.14 cm(2)·V(-1)·s(-1) within the temperature range of the columnar hexagonal phase, that i...

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