| 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
Blue-to-green emitting neutral Ir(III) complexes bearing pentafluorosulfanyl groups
Abstract
A structure-property relationship study of neutral heteroleptic (<b>1</b> and <b>2</b>, [Ir(C^N)<sub>2</sub>(L^X)]) and homoleptic (<b>3</b> and <b>4</b>, <i>fac</i>-[Ir(C^N)<sub>3</sub>]) Ir(III) complexes [where L^X = anionic 2,2,6,6-tetramethylheptane-3,5-dionato-<i>κO</i><sup>3</sup>,<i>κO</i><sup>6</sup> (thd) and C^N = a cyclometalating ligand bearing a pentafluorosulfanyl (-SF<sub>5</sub>) electron-withdrawing group (EWG) at C4 (H<b>L1</b>) and C3 (H<b>L2</b>) positions of the phenyl moiety] is presented. These complexes have been fully structurally characterised, including by single crystal X-ray diffraction, and their electrochemical and optical properties have also been extensively studied. While complexes <b>1</b> ([Ir(<b>L1</b>)2(thd)]), <b>3</b> (Ir(<b>L1</b>)3) and <b>4</b> (Ir(<b>L2</b>)3) exhibit irreversible first reduction waves based on the pentafluorosulfanyl substituent in the range of -1.71 V to -1.88 V (<i>vs</i>. SCE), complex <b>2</b> ([Ir(<b>L2</b>)2(thd)]) exhibits a quasi-reversible pyridine<sub>C^N</sub>-based first reduction wave that is anodically-shifted at -1.38 V. The metal+C^N ligand oxidation waves are all quasi-reversible in the range of 1.08-1.54 V (<i>vs</i>. SCE). The optical gap, determined from the lowest energy absorption maxima, decreases from <b>4</b> to <b>2</b> to <b>3</b> to <b>1</b> and this trend is consistent with the Hammett behaviour (σ<sub>m</sub>/σ<sub>p</sub> with respect to the metal-carbon bond) of the –SF<sub>5</sub> EWG. In degassed acetonitrile, for complexes <b>2</b>-<b>4</b>, introduction of the -SF<sub>5</sub> group produced a blue-shifted emission (λ<sub>em</sub> = 484-506 nm) compared to reference complexes [Ir(ppy)<sub>2</sub>(acac)], <b>R1</b> (where acac = acetylacetonato) (λ<sub>em</sub> = 528 nm in MeCN), [Ir(CF<sub>3</sub>-ppy)(acac)], <b>R3</b> (where CF<sub>3</sub>-ppy = 2-(4-(trifluoromethyl)phenyl)pyridine) (λ<sub>em</sub> = 522 nm in DCM) and [Ir(CF<sub>3</sub>-ppy)<sub>3</sub>], <b>R8</b> (λem = 507 nm in MeCN). The emission of complex <b>1</b>, by contrast, was modestly red-shifted (λem = 534 nm). Complexes <b>2</b> and <b>4</b>, where the –SF<sub>5</sub> EWG is substituted para to the Ir-C<sub>ppy</sub> bond are efficient phosphorescent emitters, with high photoluminescence quantum yields (Φ<sub>PL</sub> = 58-79% in degassed MeCN solution) and microsecond emission lifetimes (τ<sub>ε</sub> = 1.35-3.02 μs). Theoretical and experimental observations point towards excited states that are principally ligand-centered (<sup>3</sup>LC) in nature, but with a minor metal-to-ligand charge-transfer (<sup>3</sup>MLCT) transition component, as a function of the regiochemistry of the pentafluorosulfanyl group. The <sup>3</sup>LC character is predominant over the mixed <sup>3</sup>CT character for complexes <b>1</b>, <b>2</b> and <b>4</b> while in complex <b>3</b>, there is exclusive <sup>3</sup>LC character as demonstrated by unrestricted Density Functional Theory (DFT) calculations. The short emission lifetimes and reasonable Φ<sub>PL</sub> values in doped thin film (5 wt% in PMMA), particularly for <b>4</b>, suggest that these neutral complexes would be attractive candidate emitters in organic light-emitting diodes.