All Outputs (100)

Fluorenylporphyrins functionalized by electrochromic ruthenium units as redox-triggered fluorescence switches (2019)
Journal Article
Zhang, X., Abid, S., Shi, L., Williams, J. G., Fox, M. A., Miomandre, F., Tourbillon, C., Audibert, J.-F., Mongin, O., Paul, F., & Paul-Roth, C. O. (2019). Fluorenylporphyrins functionalized by electrochromic ruthenium units as redox-triggered fluorescence switches. Dalton Transactions, 48(31), 11897-11911. https://doi.org/10.1039/c9dt02087j

Two dyads containing tris- and tetrakis-meso-fluorenyl-substituted porphyrin and ethynylruthenium units, 1 and 2, were investigated by emission spectro-electrochemical (SEC) methods for their potential use as fluorescence switches. The ruthenium grou... Read More about Fluorenylporphyrins functionalized by electrochromic ruthenium units as redox-triggered fluorescence switches.

Single-Phase White-Emitting Phosphors Based on Apatite-Type Gadolinium Silicate, Gd9.33(SiO4)6O2 Doped with Dy3+, Eu3+ and Tb3+ (2019)
Journal Article
Rodriguez-Garcia, M. M., Williams, J. G., & Evans, I. R. (2019). Single-Phase White-Emitting Phosphors Based on Apatite-Type Gadolinium Silicate, Gd9.33(SiO4)6O2 Doped with Dy3+, Eu3+ and Tb3+. Journal of Materials Chemistry C Materials for optical and electronic devices, 7(25), 7779-7787. https://doi.org/10.1039/c9tc02336d

Two series of new apatite-type silicate materials were synthesised and characterised with the aim of achieving white light emission from single-phase phosphors. The Gd9.33(SiO4)6O2 host was doped systematically with Dy3+, Tb3+ and Eu3+ to tune the em... Read More about Single-Phase White-Emitting Phosphors Based on Apatite-Type Gadolinium Silicate, Gd9.33(SiO4)6O2 Doped with Dy3+, Eu3+ and Tb3+.

A highly luminescent tetrahydrocurcumin Ir(III) complex with remarkable photoactivated anticancer activity (2019)
Journal Article
Dragonetti, C., Colombo, A., Fontani, M., Roberto, D., Williams, G., Scotto di Perrotolo, R., Casagrande, F., Barozzi, S., & Polo, S. (2019). A highly luminescent tetrahydrocurcumin Ir(III) complex with remarkable photoactivated anticancer activity. Chemistry - A European Journal, 25(33), 7948-7952. https://doi.org/10.1002/chem.201901527

Curcumin has chemopreventive properties against a variety of tumours, but it has poor bioavailability. Two new bis‐cyclometallated iridium(III) complexes have been prepared, featuring the natural product curcumin (CUR) or its reduced form, tetrahydro... Read More about A highly luminescent tetrahydrocurcumin Ir(III) complex with remarkable photoactivated anticancer activity.

Homoleptic platinum(ii) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs (2019)
Journal Article
Walden, M. T., Pander, P., Yufit, D. S., Dias, F. B., & Williams, J. G. (2019). Homoleptic platinum(ii) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs. Journal of Materials Chemistry C Materials for optical and electronic devices, 7(22), 6592--6606. https://doi.org/10.1039/c9tc00768g

Two new homoleptic platinum(II) complexes are reported that feature aryl-appended 5-(2-pyridyl)-1,2,4- triazole chelates acting as N^N ligating ions, PtL1 2 and PtL2 2. Readily prepared from easily accessible proligands, they offer good solubility in... Read More about Homoleptic platinum(ii) complexes with pyridyltriazole ligands: excimer-forming phosphorescent emitters for solution-processed OLEDs.

An enantiopure cyclometallated iridium complex displaying long-lived phosphorescence both in solution and in the solid state (2019)
Journal Article
Crassous, J., Macé, A., Hellou, N., Hammoud, J., Martin, C., Nasser, G., Gauthier, E., Favereau, L., Roisnel, T., Caytan, E., Vanthuyne, N., Williams, G., Berrée, F., & Carboni, B. (2019). An enantiopure cyclometallated iridium complex displaying long-lived phosphorescence both in solution and in the solid state. Helvetica Chimica Acta, 102(4), https://doi.org/10.1002/hlca.201900044

A new enantiopure cyclometallated iridium complex bearing a [4]helicenic :C^C– and two :N^C– dfppy (2‐(2,4‐difluorophenyl)‐pyridyl) ligands was prepared. This complex revealed a long‐lived phosphorescence both in solution and in the solid state. Its... Read More about An enantiopure cyclometallated iridium complex displaying long-lived phosphorescence both in solution and in the solid state.

Dinuclear Design of a Pt(II) Complex Affording Highly Efficient Red Emission: Photophysical Properties and Application in Solution-Processible OLEDs (2019)
Journal Article
Shafikov, M. Z., Daniels, R., Pander, P., Dias, F. B., Williams, J. G., & Kozhevnikov, V. N. (2019). Dinuclear Design of a Pt(II) Complex Affording Highly Efficient Red Emission: Photophysical Properties and Application in Solution-Processible OLEDs. ACS Applied Materials and Interfaces, 11(8), 8182-8193. https://doi.org/10.1021/acsami.8b18928

The light-emitting efficiency of luminescent materials is invariably compromised on moving to the red and near-infrared regions of the spectrum due to the transfer of electronic excited-state energy into vibrations. We describe how this undesirable “... Read More about Dinuclear Design of a Pt(II) Complex Affording Highly Efficient Red Emission: Photophysical Properties and Application in Solution-Processible OLEDs.

Exploiting synergy between ligand design and counterion interactions to boost room temperature phosphorescence from Cu(i) compounds (2019)
Journal Article
Mondal, R., Lozada, I. B., Davis, R. L., Williams, J. G., & Herbert, D. E. (2019). Exploiting synergy between ligand design and counterion interactions to boost room temperature phosphorescence from Cu(i) compounds. Journal of Materials Chemistry C Materials for optical and electronic devices, 7(13), 3772-3778. https://doi.org/10.1039/c9tc00040b

The structural and photophysical properties of three sets of luminescent copper complexes of the form [(P^N)2Cu]X are presented. Here, P^N represents a bidentate ligand based on phenanthridine (3,4-benzoquinoline) incorporating a phosphine unit at th... Read More about Exploiting synergy between ligand design and counterion interactions to boost room temperature phosphorescence from Cu(i) compounds.

Quantification of energy transfer in bimetallic Pt(ii)–Ln(iii) complexes featuring an N^C^N-cyclometallating ligand (2019)
Journal Article
Etchells, I. M., Pfrunder, M. C., Williams, J. G., & Moore, E. G. (2019). Quantification of energy transfer in bimetallic Pt(ii)–Ln(iii) complexes featuring an N^C^N-cyclometallating ligand. Dalton Transactions, 48(6), 2142-2149. https://doi.org/10.1039/c8dt04640a

Cyclometallated Pt(II) complexes with arylpolypyridyl ligands have impressive photophysical properties (high quantum yields, long lifetimes and tuneable emission) which can be readily tuned by modification of the organic ligand. Despite this, few exa... Read More about Quantification of energy transfer in bimetallic Pt(ii)–Ln(iii) complexes featuring an N^C^N-cyclometallating ligand.

Synthesis, Mesomorphism, and Photophysics of 2,5-Bis(dodecyloxyphenyl)pyridine Complexes of Platinum(IV) (2018)
Journal Article
Parker, R. R., Sarju, J. P., Whitwood, A. C., Williams, J. G., Lynam, J. M., & Bruce, D. W. (2018). Synthesis, Mesomorphism, and Photophysics of 2,5-Bis(dodecyloxyphenyl)pyridine Complexes of Platinum(IV). Chemistry - A European Journal, 24(71), 19010-19023. https://doi.org/10.1002/chem.201804026

It has been shown for the first time that the PtIV complex cis‐[Pt(N^C‐tolpy)2Cl2] (tolpy=2‐(4‐tolyl)pyridinyl) can be prepared in a one‐pot reaction from K2[PtCl4], although analogous complexes containing 2,5‐bis(4‐dodecyloxyphenyl)pyridine (=HL) co... Read More about Synthesis, Mesomorphism, and Photophysics of 2,5-Bis(dodecyloxyphenyl)pyridine Complexes of Platinum(IV).

The luminescence properties of multinuclear platinum complexes (2018)
Journal Article
Puttock, E. V., Walden, M. T., & Williams, J. G. (2018). The luminescence properties of multinuclear platinum complexes. Coordination Chemistry Reviews, 367, 127-162. https://doi.org/10.1016/j.ccr.2018.04.003

Platinum(II) complexes featuring conjugated aromatic ligands are widely studied in the context of luminescence. Many such compounds have been discovered that display intense phosphorescence from triplet excited states, offering potential applicabilit... Read More about The luminescence properties of multinuclear platinum complexes.

Site-Selective Benzannulation of N-Heterocycles in Bidentate Ligands Leads to Blue-Shifted Emission from [(P^N)Cu]2(μ-X)2 Dimers (2018)
Journal Article
Mondal, R., Lozada, I. B., Davis, R. L., Williams, J. G., & Herbert, D. E. (2018). Site-Selective Benzannulation of N-Heterocycles in Bidentate Ligands Leads to Blue-Shifted Emission from [(P^N)Cu]2(μ-X)2 Dimers. Inorganic Chemistry, 57(9), 4966-4978. https://doi.org/10.1021/acs.inorgchem.7b03223

Benzannulated bidentate pyridine/phosphine (P^N) ligands bearing quinoline or phenanthridine (3,4-benzoquinoline) units have been prepared, along with their halide-bridged, dimeric Cu(I) complexes of the form [(P^N)Cu]2(μ-X)2. The copper complexes ar... Read More about Site-Selective Benzannulation of N-Heterocycles in Bidentate Ligands Leads to Blue-Shifted Emission from [(P^N)Cu]2(μ-X)2 Dimers.

On the antibacterial activity of azacarboxylate ligands: lowered metal ion affinities for bis-amide derivatives of EDTA do not mean reduced activity (2018)
Journal Article
Mulla, R. S., Beecroft, M. S., Pal, R., Aguilar, J., Pitarch-Jarque, J., García‐España, E., Lurie-Luke, E., Sharples, G., & Williams, J. (2018). On the antibacterial activity of azacarboxylate ligands: lowered metal ion affinities for bis-amide derivatives of EDTA do not mean reduced activity. Chemistry - A European Journal, 24(28), 7137-7148. https://doi.org/10.1002/chem.201800026

EDTA is widely used as an inhibitor of bacterial growth, affecting the uptake and control of metal ions by microorganisms. We describe the synthesis and characterisation of two symmetrical bis‐amide derivatives of EDTA, featuring glycyl or pyridyl su... Read More about On the antibacterial activity of azacarboxylate ligands: lowered metal ion affinities for bis-amide derivatives of EDTA do not mean reduced activity.

APTRA-based luminescent lanthanide complexes displaying enhanced selectivity for Mg2+ (2018)
Journal Article
Parker, D., Walter, E., & Williams, J. (2018). APTRA-based luminescent lanthanide complexes displaying enhanced selectivity for Mg2+. Chemistry - A European Journal, 24(30), 7724-7733. https://doi.org/10.1002/chem.201800745

A series of three europium(III) complexes has been created in which an APTRA moiety has been integrated into the sensitising chromophore (APTRA = o‐aminophenol‐N,N,N‐triacetate). The constitutionally isomeric complexes EuL1 and EuL2 feature the APTRA... Read More about APTRA-based luminescent lanthanide complexes displaying enhanced selectivity for Mg2+.

Tuning Mg2+ selectivity: comparative analysis of the photophysical properties of four fluorescent probes with an alkynyl-naphthalene fluorophore (2018)
Journal Article
Parker, D., Williams, J., & Walter, E. (2018). Tuning Mg2+ selectivity: comparative analysis of the photophysical properties of four fluorescent probes with an alkynyl-naphthalene fluorophore. Chemistry - A European Journal, 24(24), 6432-6441. https://doi.org/10.1002/chem.201800013

Four alkynyl‐1‐naphthyl fluorophores have been synthesised with tri‐ or pentadentate ligating groups suited to the binding of magnesium. Their photophysical and binding properties for magnesium, calcium and zinc ions have been assessed using absorpti... Read More about Tuning Mg2+ selectivity: comparative analysis of the photophysical properties of four fluorescent probes with an alkynyl-naphthalene fluorophore.

Enhanced selectivity for Mg2+ with a phosphinate-based chelate: APDAP versus APTRA (2018)
Journal Article
Walter, E. R., Fox, M. A., Parker, D., & Williams, J. G. (2018). Enhanced selectivity for Mg2+ with a phosphinate-based chelate: APDAP versus APTRA. Dalton Transactions, 47(6), 1755-1763. https://doi.org/10.1039/c7dt04698g

o-Aminophenol-N,N,O-triacetate, known as APTRA, is one of the most well-established ligands for targeting magnesium ions but, like other aminocarboxylate ligands, it binds Ca2+ much more strongly than Mg2+. The synthesis of an O-phosphinate analogue... Read More about Enhanced selectivity for Mg2+ with a phosphinate-based chelate: APDAP versus APTRA.

Solvent polarity and oxygen sensitivity, rather than viscosity, determine lifetimes of biaryl-sensitised terbium luminescence (2017)
Journal Article
Walter, E. R., Williams, J. G., & Parker, D. (2017). Solvent polarity and oxygen sensitivity, rather than viscosity, determine lifetimes of biaryl-sensitised terbium luminescence. Chemical Communications, 53(100), 13344-13347. https://doi.org/10.1039/c7cc08361k

In a macrocyclic terbium complex incorporating a biaryl sensitiser, the observed variation of emission lifetime is shown to be determined by the solubility of oxygen in the solvent system and the relative energy of the chromophore excited state, rath... Read More about Solvent polarity and oxygen sensitivity, rather than viscosity, determine lifetimes of biaryl-sensitised terbium luminescence.

Monothiatruxene: a new versatile core for functional materials (2017)
Journal Article
Maciejczyk, M. R., Williams, J. G., Robertson, N., & Pietraszkiewicz, M. (2017). Monothiatruxene: a new versatile core for functional materials. RSC Advances, 7(78), 49532-49535. https://doi.org/10.1039/c7ra07671a

A truxene molecule incorporating a sulfur atom at one of the three bridgehead positions has been prepared through an efficient route, together with its oxidized analogue (featuring an SO2 unit) and brominated derivatives. The photophysical, electroch... Read More about Monothiatruxene: a new versatile core for functional materials.

Photon Funnels for One-Way Energy Transfer: Multimetallic Assemblies Incorporating Cyclometallated Iridium or Rhodium Units Accessed by Sequential Cross-Coupling and Bromination (2017)
Journal Article
Knuckey, K. J., & Williams, J. G. (2017). Photon Funnels for One-Way Energy Transfer: Multimetallic Assemblies Incorporating Cyclometallated Iridium or Rhodium Units Accessed by Sequential Cross-Coupling and Bromination. European Journal of Inorganic Chemistry, 2017(44), 5205-5214. https://doi.org/10.1002/ejic.201701020

The generation of multimetallic assemblies is a widely explored theme, owing to the relevance of controlling energy and electron transfer between metal centres to many fields of contemporary importance. Boronic acid substituted coordination and organ... Read More about Photon Funnels for One-Way Energy Transfer: Multimetallic Assemblies Incorporating Cyclometallated Iridium or Rhodium Units Accessed by Sequential Cross-Coupling and Bromination.

Strategies for the synthesis of HBGl3, a glutamic acid derived ligand bearing phenolic and azacarboxylate donor groups at the nitrogen atom (2017)
Journal Article
Mulla, R. S., Walden, M. T., Yufit, D. S., Desa, T., Lurie-Luke, E., & Williams, J. G. (2017). Strategies for the synthesis of HBGl3, a glutamic acid derived ligand bearing phenolic and azacarboxylate donor groups at the nitrogen atom. Tetrahedron, 73(45), 6410-6420. https://doi.org/10.1016/j.tet.2017.09.032

The development of a route applicable to the preparation of acyclic glutamic acid-based chelating ligands bearing two different auxiliary donor groups linked to the nitrogen atom by methylene spacers is described and applied to the synthesis of the n... Read More about Strategies for the synthesis of HBGl3, a glutamic acid derived ligand bearing phenolic and azacarboxylate donor groups at the nitrogen atom.

Enantiopure cycloiridiated complexes bearing a pentahelicenic N-heterocyclic carbene and displaying long-lived circularly-polarized phosphorescence (2017)
Journal Article
Crassous, J., Hellou, N., Srebro-Hooper, M., Favereau, L., Zinna, F., Caytan, E., …Autschbach, J. (2017). Enantiopure cycloiridiated complexes bearing a pentahelicenic N-heterocyclic carbene and displaying long-lived circularly-polarized phosphorescence. Angewandte Chemie International Edition, 56(28), 8236-8239. https://doi.org/10.1002/anie.201704263

A fused pi-helical N-heterocyclic (NHC) system has been prepared and examined through its diastereoisomerically pure cycloiridiated complexes. The latter display light-green phosphorescence with i) unusually long lifetimes and ii) circular polarizati... Read More about Enantiopure cycloiridiated complexes bearing a pentahelicenic N-heterocyclic carbene and displaying long-lived circularly-polarized phosphorescence.