ORCID Profile
0000-0002-3461-9675
Current Organisation
University of Nottingham
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: American Chemical Society (ACS)
Date: 25-03-2013
DOI: 10.1021/JO400026R
Abstract: The synthesis and separation of the 1,6- and 1,7- isomers of N,N'-bis(alkyl)diadamantylthio-3,4,9,10-perylenetetracarboxylic acid diimide are reported. Investigations of the structural, electrochemical, spectroscopic, and spectroelectrochemical properties of the isomers reveal a sequence of electrochemically and chemically reversible reduction processes for both isomers. Three X-ray crystal structures are reported including a pair of 1,6- and 1,7-isomers demonstrating the twist of the perylene core in the solid state. Our studies thoroughly characterize the mono- and direduced states of the two isomers allowing unequivocal characterization of the reduced species by UV-vis and IR spectroscopic measurements. EPR studies also allow direct identification of the monoreduced PTCDI species and spectroscopic measurements confirm the delocalization of electronic density around the carbonyl moieties of the reduced species.
Publisher: American Chemical Society (ACS)
Date: 09-12-2011
DOI: 10.1021/JA207845U
Abstract: Reaction of H(3)L with Cd(NO(3))(2)·4H(2)O in DMF at 150 °C for 3 days affords the metal-organic nanosphere [Cd(66)(μ(3)-OH)(28)(μ(3)-O)(16)(μ(5)-NO(3)-O,O,O',O',O″,O″)(12)(L)(20)(μ(2)-DMF)(12)⊂(DMF)(9)]. The cluster is composed of a spherical shell of 66 Cd(II) cations bridged by 28 μ(3)-hydroxide, 16 μ(3)-oxo, and five μ(5)-NO(3)(-) anions surrounded by a shell of 20 tripodal capping ligands (L) and 12 DMF ligands. The 66 Cd(II) cations and 12 NO(3)(-) anions form a polydeltahedron that has 78 vertices [Cd(II) or NO(3)(-)] (V), 228 edges (E), and 152 triangular faces (F), giving it an Euler characteristic (χ) of 2 (χ = V + F - E). Reaction of H(3)L with Cd(NO(3))(2)·4H(2)O at lower temperatures or with CdCl(2) affords coordination polymer frameworks instead of nanospheres.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4SC03531C
Abstract: The synthesis and surface-based self-assembly of thymine-functionalised porphyrins is described.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8SC03622E
Abstract: We report a series of six isoreticular metal–organic frameworks (MOFs) for selective gas adsorption, specifically for selective adsorption of CO 2 and C 2 H 2 .
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2DT12055K
Abstract: Five new metal-organic frameworks prepared from the ligand 5-bis(3-(1-imidazolyl)propylcarbamoyl)terephthalate (bipta(2-)) and transition metal salts, Zn(2+) (1), Co(2+) (2), Mn(2+) (3, 4) and Cu(2+) (5), are reported. Single crystal X-ray studies reveal that the bipta(2-) ligand acts as a tetradentate ligand and combines with four-coordinate cationic metal nodes to give four-connected framework structures. Whilst reaction of bipta(2-) with Zn(II) gives rise to a framework of diamondoid topology 1, the analogous frameworks with Co(II), Mn(II) and Cu(II) afford frameworks that incorporate square-planar nodes. Whereas 2 and 5 form frameworks of Cd(SO(4)) (cds) and square 4(4) nets (sql), respectively, reaction of Mn(II) with bipta(2-) forms two supramolecular isomers of topology cds for 3 and sql for 4.
Publisher: Wiley
Date: 26-04-2023
Abstract: Herein, we report the synthesis and characterization of a new class of hybrid Wells–Dawson polyoxometalate (POM) containing a diphosphoryl group (P 2 O 6 X) of the general formula [P 2 W 17 O 57 (P 2 O 6 X)] 6− (X=O, NH, or CR 1 R 2 ). Modifying the bridging unit X was found to impact the redox potentials of the POM. The ease with which a range of α‐functionalized diphosphonic acids (X=CR 1 R 2 ) can be prepared provides possibilities to access erse functionalized hybrid POMs. Compared to existing phosphonate hybrid Wells–Dawson POMs, diphosphoryl‐substituted POMs offer a wider tunable redox window and enhanced hydrolytic stability. This study provides a basis for the rational design and synthesis of next‐generation hybrid Wells–Dawson POMs.
Publisher: Elsevier BV
Date: 08-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2DT03531F
Abstract: Demonstration that m -terphenyls are tuneable and versatile ligands capable of inducing highly axial ligand fields upon a low-coordinate metal centre.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CE00039J
Abstract: Crystal structures of the title compounds show erse packing by interactions of auxochromes giving materials with varied optoelectronic properties.
Publisher: Wiley
Date: 12-2011
Abstract: The first ex le of a [2]-rotaxane in which a perylene diimide acts as a recognition site has been synthesised and characterised. The interlocked nature of the compound has been verified by both NMR studies and an X-ray structure determination. Electrochemical investigations confirm that the nature of the redox processes associated with the perylene diimide are modified by the complexation process and that it is possible to mono-reduce the [2]-rotaxane to give a radical anion based rotaxane. Further reduction of the compound leads to de-threading of the macrocycle from the reduced PTCDI recognition site. Our synthetic strategies confirm the potential of PTCDI-based rotaxanes as viable targets for the preparation of complex interlocked species.
Publisher: Wiley
Date: 26-04-2023
Abstract: Herein, we report the synthesis and characterization of a new class of hybrid Wells–Dawson polyoxometalate (POM) containing a diphosphoryl group (P 2 O 6 X) of the general formula [P 2 W 17 O 57 (P 2 O 6 X)] 6− (X=O, NH, or CR 1 R 2 ). Modifying the bridging unit X was found to impact the redox potentials of the POM. The ease with which a range of α‐functionalized diphosphonic acids (X=CR 1 R 2 ) can be prepared provides possibilities to access erse functionalized hybrid POMs. Compared to existing phosphonate hybrid Wells–Dawson POMs, diphosphoryl‐substituted POMs offer a wider tunable redox window and enhanced hydrolytic stability. This study provides a basis for the rational design and synthesis of next‐generation hybrid Wells–Dawson POMs.
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1DT10057B
Abstract: The synthesis, structural and magnetic characterisation of trinuclear manganese cluster, [Mn(3)O(O(2)C-anth)(6)(HOCH(3))(3)] 1 (where O(2)C-anth = 9-anthracenecarboxylate), with crystallographic three-fold (C(3)) symmetry, are described. The cluster was prepared by a carboxylate exchange reaction between HO(2)C-anth and [Mn(12)O(12)(O(2)CMe)(16)(H(2)O)(4)] with concomitant fragmentation of the dodecanuclear Mn core of the starting material to form a trinuclear Mn(3)(μ(3)-O) cluster capped by six carboxylate ligands. Bond valence sum calculations and SQUID magnetometric measurements establish the oxidation states of the metal ions as Mn(II)·2 Mn(III) which are antiferromagnetically coupled.
Publisher: American Chemical Society (ACS)
Date: 21-07-2023
DOI: 10.1021/JACS.3C03207
Publisher: American Chemical Society (ACS)
Date: 30-05-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3CC02138F
Abstract: An organofunctionalised hybrid polyoxometalate bearing Ru antennae exhibits selective CO 2 electrochemical reduction to C1 feedstocks.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3DT50874A
Abstract: The synthesis and photophysical study of a perylene diimide (PDI) functionalised with platinum acetylide units of the type, trans{-C≡C-Pt(PBu3)2-C≡C-Ph} and comparison with a phenylacetylide substituted model compound are reported. The model compound demonstrates typical perylene absorption and photoluminescence spectra characteristic of singlet excited state formation and decay. The Pt-substitution, however, appears to induce spin-orbit coupling into the chromophore and giving rise to a triplet excited state which was confirmed by transient absorption measurements. This excited state is quenched by oxygen, leading to the formation of singlet oxygen in dichloromethane, recorded by time-resolved near-infrared luminescence measurements.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0DT03972A
Abstract: Spectroscopic and computational investigation of the effects of para -substituted m -terphenyl lithium complexes reveals significant electronic differences at the metal centre.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Stephen Argent.