Research Repository

See what's under the surface


Restricting shuttling in bis(imidazolium)…pillar[5]arene rotaxanes using metal coordination (2018)
Journal Article
Langer, P., Yang, L., Pfeiffer, C. R., Lewis, W., & Champness, N. R. (2018). Restricting shuttling in bis(imidazolium)…pillar[5]arene rotaxanes using metal coordination. Dalton Transactions, 48(1), 58-64. doi:10.1039/c8dt04096f

Metal coordination to a series of bis(imidazolium)…pillar[5]arene [2]rotaxanes through the formation of metal-carbene bonds facilitates a new strategy to restrict the shuttling motion in [2]rotaxanes. Whereas the pillar[5]arene macrocycle rapidly shu... Read More

Thionated perylene diimide–phenothiazine dyad: synthesis, structure, and electrochemical studies (2018)
Journal Article
Pearce, N., Davies, E. S., Lewis, W., & Champness, N. R. (2018). Thionated perylene diimide–phenothiazine dyad: synthesis, structure, and electrochemical studies. ACS Omega, 3(10), 14236-14244. doi:10.1021/acsomega.8b02457

Perylene diimides (PDIs) are promising candidates for n-type semiconductor materials and, thus, for use in organic electronics. Thionation of the imide moiety provides an efficient strategy to control the donor−acceptor gap of these types of compounds... Read More

Controlling the two-dimensional self-assembly of functionalized porphyrins via adenine–thymine Quartet formation (2018)
Journal Article
Blunt, M. O., Hu, Y., Toft, C. W., Slater, A. G., Lewis, W., & Champness, N. R. (2018). Controlling the two-dimensional self-assembly of functionalized porphyrins via adenine–thymine Quartet formation. Journal of Physical Chemistry C, 122(45), 26070-26079. doi:10.1021/acs.jpcc.8b08888

The development of supramolecular synthons capable of driving hierarchical two-dimensional (2D) self-assembly is an important step toward the growth of complex and functional molecular surfaces. In this work, the formation of nucleobase quartets cons... Read More

Influence of hydrogen-bonding interactions on nuclearity and structure of palladium tiara-like complexes (2018)
Journal Article
Martin, H. J., Pfeiffer, C. R., Davies, E. S., Davis, A. L., Lewis, W., & Champness, N. R. (2018). Influence of hydrogen-bonding interactions on nuclearity and structure of palladium tiara-like complexes. ACS Omega, 3(8), 8769-8776. doi:10.1021/acsomega.8b01133

The role of intramolecular hydrogen-bonding interactions upon the nuclearity of palladium tiara-like complexes is reported herein. The synthesis of three palladium tiaras is described with three related thiolate ligands that vary in their hydrogen-bo... Read More

Synthesis of hydrophobic MIL-53 (Al) nanoparticles in low molecular weight alcohols: systematic investigation of solvent effects (2018)
Journal Article
Warfsman, J., Tokay, B., & Champness, N. (2018). Synthesis of hydrophobic MIL-53 (Al) nanoparticles in low molecular weight alcohols: systematic investigation of solvent effects. CrystEngComm, 20(32), (4666-4675). doi:10.1039/C8CE00913A

The effects of using low-weight alcohols, methanol and ethanol, for the synthesis of MIL-53(Al) are investigated and the results directly compared with analogous synthesis in water and N,N-dimethylformamide (DMF). When methanol is employed in the syn... Read More

Protecting-group-free site-selective reactions in a metal–organic framework reaction vessel (2018)
Journal Article
Huxley, M. T., Burgun, A., Ghodrati, H., Coghlan, C. J., Lemieux, A., Champness, N. R., …Sumby, C. J. (2018). Protecting-group-free site-selective reactions in a metal–organic framework reaction vessel. Journal of the American Chemical Society, 140(20), doi:10.1021/jacs.8b02896. ISSN 0002-7863

Site-selective organic transformations are commonly required in the synthesis of complex molecules. By employing a bespoke metal-organic framework (MOF, 1·[Mn(CO)3N3]), in which coordinated azide anions are precisely positioned within 1D channels, w... Read More

Perylene diimide triple helix formation in the solid-state (2018)
Journal Article
Haddow, S. L., Ring, D. J., Bagha, H., Pearce, N., Nowell, H., Blake, A. J., …Champness, N. R. (2018). Perylene diimide triple helix formation in the solid-state. Crystal Growth and Design, 18(2), doi:10.1021/acs.cgd.7b01268. ISSN 1528-7483

The structural characterisation of single crystals of di-4-pyridyl-substituted 3,4,9,10-perylenetetracarboxylic diimide reveals a surprising triple helical arrangement. The intermolecular interactions that lead to such an arrangement are investigated... Read More

Supramolecular networks stabilise and functionalise black phosphorus (2017)
Journal Article
Korolkov, V. V., Timokhin, I. G., Haubrichs, R., Smith, E. F., Yang, L., Yang, S., …Beton, P. H. (in press). Supramolecular networks stabilise and functionalise black phosphorus. Nature Communications, 8, doi:10.1038/s41467-017-01797-6. ISSN 2041-1723

The limited stability of the surface of black phosphorus (BP) under atmospheric conditions is a significant constraint on the exploitation of this layered material and its few layer analogue, phosphorene, as an optoelectronic material. Here we show t... Read More

Ullmann coupling reactions on Ag(111) and Ag(110); substrate influence on the formation of covalently coupled products and intermediate metal-organic structures Metal-Organic Structures (2017)
Journal Article
Metal-Organic Structures. Scientific Reports, 7(14541), doi:10.1038/s41598-017-13315-1. ISSN 2045-2322

On-surface reactions based on Ullmann coupling are known to proceed on coinage-metal substrates (e.g. Au, Ag, Cu), with the chemistry of the surface strongly influencing the reaction progression. In addition, the topography of the surface may be expe... Read More

Thionated naphthalene diimides: tuneable chromophores for applications in photoactive dyads (2017)
Journal Article
Pearce, N., Davies, E. S., Horvath, R., Pfeiffer, C. R., Sun, X., Lewis, W., …Champness, N. R. (2018). Thionated naphthalene diimides: tuneable chromophores for applications in photoactive dyads. Physical Chemistry Chemical Physics, 20(2), doi:10.1039/c7cp06952a. ISSN 1463-9076

Varying the degree of thionation of a series of naphthalene diimide (NDI) and naphthalic imides (NI) phenothiazine dyad systems afford a systematic approach for tuning of the system’s donor-acceptor energy gap. Each dyad was compared to model NDI/NI... Read More

Covalent organic frameworks and organic cage structures (2017)
Journal Article
Banerjee, R., & Champness, N. R. (in press). Covalent organic frameworks and organic cage structures. CrystEngComm, 19, doi:10.1039/C7CE90115A. ISSN 1466-8033

The last 20 years have seen an enormous interest in research on the topic of crystalline porous framework materials, especially metal–organic frameworks (MOFs). MOFs exploit reversible metal–coordination chemistry to create extended, crystalline soli... Read More

Metal–organic frameworks in seconds via selective microwave heating (2017)
Journal Article
Laybourn, A., Katrib, J., Ferrari-John, R. S., Morris, C. G., Yang, S., Udoudo, O., …Schröder, M. (2017). Metal–organic frameworks in seconds via selective microwave heating. Journal of Materials Chemistry A, 16(5), doi:10.1039/C7TA01493G. ISSN 2050-7488

Synthesis of metal–organic framework (MOF) materials via microwave heating often involves shorter reaction times and offers enhanced control of particle size compared to conventional heating. However, there is little understanding of the interactions... Read More

Core-substituted naphthalene diimides: influence of substituent conformation on strong visible absorption (2017)
Journal Article
substituent conformation on strong visible absorption. ChemPlusChem, 82(3), doi:10.1002/cplu.201700059. ISSN 2192-6506

Substitution of the aromatic core of naphthalene diimide (NDI) chromophores by morpholine leads to molecules with strong absorbance in the visible spectrum. The shift of absorption maxima to lower energy is determined not only by the degree of substi... Read More

Assembly of high nuclearity clusters from a family of tripodal tris-carboxylate ligands (2016)
Journal Article
Argent, S. P., Tarassova, I., Greenaway, A., Nowell, H., Barnett, S. A., Warren, M. R., …Blake, A. J. (2016). Assembly of high nuclearity clusters from a family of tripodal tris-carboxylate ligands. Polyhedron, 120, doi:10.1016/j.poly.2016.04.029. ISSN 0277-5387

A family of four tris-carboxylic acid ligands 1,3,5-tris(4′-carboxybiphenyl-2-yl)benzene (H3L1), 1,3,5-tris-2-carboxyphenylbenzene (H3L2), 1,3,5-tris(4″-carboxy-para-terphenyl-2-yl)benzene (H3L3) and 1,3,5-tris(3′-carboxybiphenyl-2-yl)benzene (H3L4)... Read More

Thionated perylene diimides with intense absorbance in the near-IR (2015)
Journal Article
Llewellyn, B. A., Davies, S. E., Pfeiffer, C. R., Cooper, M., Lewis, W., & Champness, N. R. (2015). Thionated perylene diimides with intense absorbance in the near-IR. Chemical Communications, doi:10.1039/C5CC09962E. ISSN 1359-7345

A synthetic strategy involving a combination of tetra-thionation and amine substitution in the bay region of a perylene diimide (PDI) leads to remarkable examples of neutral PDIs with intense absorption maxima in the near infrared. Generation of the... Read More

Physisorption controls the conformation and density of states of an adsorbed porphyrin (2015)
Journal Article
Jarvis, S. P., Taylor, S., Baran, J., Thompson, D., Saywell, A., Mangham, B., …Moriarty, P. (2015). Physisorption controls the conformation and density of states of an adsorbed porphyrin. Journal of Physical Chemistry C, 119(50), doi:10.1021/acs.jpcc.5b08350. ISSN 1932-7447

Conformational changes caused by adsorption can dramatically affect a molecule’s properties. Despite extensive study, however, the exact mechanisms underpinning conformational switching are often unclear. Here we show that the conformation of a proto... Read More