| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Slawin, Alexandra Martha Zoya
University of St Andrews
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (65/65 displayed)
- 2024Synthesis, characterization, X-ray Crystallography, Photoluminescence property and DNA binding activity of Co(II) and Ni(II) complexes of a pyrazole containing Schiff-base ligandcitations
- 2023Manipulation of structure and optoelectronic properties through bromine inclusion in a layered lead bromide perovskitecitations
- 2023Synthesis, spectroscopy and structural elucidation of two new CoII and NiII complexes of pyrazole derived heterocyclic Schiff base ligand as potential anticancer and photocatalytic agents
- 2022Synthesis, structure and tunability of zero dimensional organic-inorganic metal halides utilising the m-xylylenediammonium cation: MXD2PbI6, MXDBiI5, and MXD3Bi2Br12·2H2Ocitations
- 2022A two-dimensional manganese-containing coordination polymer for efficient catalysis of the oxygen evolutioncitations
- 2021Synthesis and structural characterization of Zn2+, Cd2+ and Hg2+ complexes with tripyrrolidinophosphine chalcogenidescitations
- 2021Structural features in some layered hybrid copper chloride perovskitescitations
- 2021Synthetic and structural study of peri-substituted phosphine-arsinescitations
- 2021A simplified extractive metallurgy exercise to demonstrate selective extraction of coppercitations
- 2020A simplified extractive metallurgy exercise to demonstrate selective extraction of coppercitations
- 2019Structure and properties evolution with inorganic and organic acids of a new organo-chlorocadmate compound (C6H20N3)2[Cd2Cl10]citations
- 2019Synthesis, spectroscopic, and structural characterization of new functionalized gem-bisphosphonate complexes of tin(IV) chloride
- 2019Stable 6H organic-inorganic hybrid lead perovskite and competitive formation of 6H and 3C perovskite structure with mixed A cationscitations
- 2019Copper complexes of arylselenolate-based ligandscitations
- 2019A Pd3L6 supramolecular cage incorporating photoactive [2.2]paracyclophane Unitscitations
- 2019Synthesis, characterization, and structural properties of mercury(II), cadmium(II) and zinc(II) tripiperidinophosphine chalcogenide complexescitations
- 2019A single crystal study of CPO-27 and UTSA-74 for nitric oxide storage and releasecitations
- 2019Enhancement of electrical conductivity due to structural distortion from linear to nonlinear dicarboxylato-bridged Zn(II) 1D-coordination polymerscitations
- 2018Synthesis, spectroscopic, and structural characterization of new functionalized gem-bisphosphonate complexes of tin(IV) chloride
- 2018A study of through-space and through-bond JPP coupling in a rigid nonsymmetrical bis(phosphine) and its metal complexescitations
- 2018Morphology- and size-controlled synthesis of a metal-organic framework under ultrasound irradiationcitations
- 2018The effect of different parameters under ultrasound irradiation for synthesis of new nanostructured Fe3O4@bio-MOF as an efficient anti-leishmanial in vitro and in vivo conditionscitations
- 2018Synthesis, characterization and antimicrobial activities of Co(III) and Ni(II) complexes with 5-methyl-3-formylpyrazole-N(4)-dihexylthiosemicarbazone (HMPzNHex2)citations
- 2018Synthesis, spectroscopic, and structural characterization of new functionalized gem -bisphosphonate complexes of tin(IV) chloride
- 2017Blue-to-green emitting neutral Ir(III) complexes bearing pentafluorosulfanyl groups:a combined experimental and theoretical studycitations
- 2017Blue-to-green emitting neutral Ir(III) complexes bearing pentafluorosulfanyl groups : a combined experimental and theoretical studycitations
- 2017Assembly-diassembly-organization-reassembly synthesis of zeolites based on cfi-type layerscitations
- 2017Blue-to-green emitting neutral Ir(III) complexes bearing pentafluorosulfanyl groupscitations
- 2017Synthesis, characterization and structures of cadmium(II) and mercury(II) complexes with bis(dipiperidinylphosphino)methylamine dichalcogenidescitations
- 2016Spirocyclic, macrocyclic and ladder complexes of coinage metals and mercury with dichalcogeno P2N2-supported anionscitations
- 2016Rhodium(III) and iridium(III) half-sandwich complexes with tertiary arsine and stibine ligandscitations
- 2016Synthesis and characterization of green-to-yellow emissive Ir(III) complexes of pyridylbenzothiadiazine ligandcitations
- 2016Enhancing the photoluminescence quantum yields of blue-emitting cationic iridium(III) complexes bearing bisphosphine ligandscitations
- 2016Enhancing the photoluminescence quantum yields of blue-emitting cationic iridium(III) complexes bearing bisphosphine ligandscitations
- 2016Varying the flexibility of the aromatic backbone in half sandwich rhodium(III) dithiolato complexescitations
- 2016Peri-substituted phosphorus-tellurium systems – an experimental and theoretical investigation of the P∙∙∙Te through-space interactioncitations
- 2016Synthesis, properties and Light-Emitting Electrochemical Cell (LEEC) device fabrication of cationic Ir(III) complexes bearing electron-withdrawing groups on the cyclometallating ligandscitations
- 2016Synthesis, properties and Light-Emitting Electrochemical Cell (LEEC) device fabrication of cationic Ir(III) complexes bearing electron-withdrawing groups on the cyclometallating ligandscitations
- 2016Synthesis, characterization and structures of cadmium(II) and mercury(II) complexes with bis(dipiperidinylphosphino)methylamine dichalcogenidescitations
- 2015Spirocyclic, macrocyclic and ladder complexes of coinage metals and mercury with dichalcogeno P2N2-supported anionscitations
- 2015Rhodium(III) and iridium(III) half-sandwich complexes with tertiary arsine and stibine ligandscitations
- 2015Spirocyclic, macrocyclic and ladder complexes of coinage metals and mercury with dichalcogeno P 2 N 2 -supported anionscitations
- 2015Peri-substituted phosphorus-tellurium systems – an experimental and theoretical investigation of the P∙∙∙Te through-space interactioncitations
- 2015Peri-substituted phosphorus-tellurium systems – an experimental and theoretical investigation of the P∙∙∙Te through-space interactioncitations
- 2014Synthesis, characterization, X-ray crystallography and antimicrobial activities of new Co(III) and Cu(II) complexes with a pyrazole based Schiff base ligandcitations
- 2014A trinuclear crystallochromic Cd(II) complex with zwitterionic coordination terminals
- 2013The X-ray Structure of 5-Chlorosalicylaldehydecitations
- 2012Synthesis, characterization and structure of mononuclear cobalt(III) carbonato complexes containing a tailored tetradentate amine as an end-capping ligand
- 2012Coordinatively unsaturated ruthenium complexes as efficient alkyne-azide cycloaddition catalystscitations
- 2012Reactivity of dipyrimidyldiselenides with [M(PPh3)(4)] and 2-pyrimidylchalcogenolates with [MCl2(diphosphine)] (M = Pd or Pt)citations
- 2012Nanoporous Carbohydrate Metal-Organic Frameworkscitations
- 2012Structure-Property Relationships in PtII Diimine-Dithiolate Nonlinear Optical Chromophores Based on Arylethylene-1,2-dithiolate and 2-Thioxothiazoline-4,5-dithiolatecitations
- 2011A co-templating route to the synthesis of Cu SAPO STA-7, giving an active catalyst for the selective catalytic reduction of NOcitations
- 2011Two- and three-dimensional packing diagrams of M(salophen) complexescitations
- 2009Three new coordination complexes of cobalt(III), manganese(II), and copper(II) with N,N,O-donor hydrazone ligands: syntheses and structural characterizationscitations
- 2004Ruthenium(II) carbonyl complexes containing tertiary phosphine chalcogenide ligands of the type Ph 3 PX; X=O, S, Secitations
- 2004The structure of poly(ethylene oxide) 8 : NaBPh 4 from a single crystal oligomer and polycrystalline polymercitations
- 2003Mechanically linked polycarbonatecitations
- 2003Synthesis, spectra and crystal structure of 2-({[3-(methyl{3-[(2-hydroxybenzylidene)amino]propyl} amino)propyl]imino}methyl)phenol copper(II) complexcitations
- 2003Phosphorus-selenium heterocycles from the tetraphospholane (PhP) 4 CH 2
- 2002Hydrocarbonylation reactions using alkylphosphine-contaning dendrimers based on a polyhedral oligosilsesquioxane corecitations
- 2001Azamacrocycles and the azaoxacryptand 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8] hexacosane as structure-directing agents in the synthesis of microporous metalloaluminophosphates
- 2001Nickel complexed within an azamacrocycle as a structure directing agent in the crystallisation of the framework metalloaluminophosphates STA-6 and STA-7
- 2001Synthesis of chelate complexes and the dichalcogen derivatives of the unsymmetrical diphosphine ligand Ph 2 PNHC 6 H 4 PPh 2 . Molecular Structure of [PtCl 2 (Ph 2 PNHC 6 H 4 PPh 2 )]·0.75dmso·0.75CHCl 3citations
- 2001Bridge cleavage of transition metal dimers by chelating S,N ligands. X-ray crystal structure of [Pd{SPPh 2 N=C(NH2)NH-S,N}(3-C3H5)]
Places of action
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article
Synthesis, properties and Light-Emitting Electrochemical Cell (LEEC) device fabrication of cationic Ir(III) complexes bearing electron-withdrawing groups on the cyclometallating ligands
Abstract
The structure-property relationship study of a series of cationic Ir(III) complexes in the form of [Ir(C^N)<sub>2</sub>(d<i>t</i>Bubpy)]PF<sub>6</sub> [where dtBubpy = 4,4′-di<i>tert</i>-butyl-2,2′- bipyridine and C^N = cyclometallating ligand bearing an electron-withdrawing group (EWG) at C<sub>4</sub> of the phenyl substituent, i.e. -CF<sub>3</sub> (<b>1</b>), -OCF<sub>3</sub> (<b>2</b>), -SCF<sub>3</sub> (<b>3</b>), -SO<sub>2</sub>CF<sub>3</sub> (<b>4</b>)] have been investigated. The physical and optoelectronic properties of the four complexes were comprehensively characterized, including by X-ray diffraction analysis. All the complexes exhibit quasi-reversible dtBubpy-based reductions from -1.29 V to -1.34 V (<i>vs</i>. SCE). The oxidation processes are likewise quasi-reversible (metal+C^N ligand) and are between 1.54- 1.72 V (<i>vs</i>. SCE). The relative oxidation potentials follow a general trend associated with the Hammett parameter (σ) of the EWGs. Surprisingly, complex <b>4</b> bearing the strongest EWG does not adhere to the expected Hammett behavior and was found to exhibit red-shifted absorption and emission maxima. Nevertheless, the concept of introducing EWGs was found to be generally useful in blue-shifting the emission maxima of the complexes (λ<sub>em</sub> = 484-545 nm) compared to that of the prototype complex [Ir(ppy)<sub>2</sub>(d<i>t</i>Bubpy)]PF<sub>6</sub> (where ppy = 2- phenylpyridinato) (λ<sub>em</sub> = 591 nm). The complexes were found to be bright emitters in solution at room temperature (Φ<sub>PL</sub> = 45-66%) with long excited-state lifetimes (τ<sub>e</sub> = 1.14-4.28 μs). The photophysical properties along with Density Functional Theory (DFT) calculations suggest that the emission of these complexes originates from mixed contributions from ligand-centered (LC) transitions and mixed metal-to-ligand and ligand-to-ligand charge transfer (LLCT/MLCT) transitions, depending on the EWG. In complexes <b>1</b>, <b>3</b> and <b>4</b> the <sup>3</sup>LC character is prominent over the mixed <sup>3</sup>CT character while in complex <b>2</b>, the mixed <sup>3</sup>CT character is much more pronounced, as demonstrated by DFT calculations and the observed positive solvatochromism effect. Due to the quasi-reversible nature of the oxidation and reduction waves, fabrication of light emitting electrochemical cells (LEECs) using these complexes as emitters was possible with the LEECs showing moderate efficiencies.