Many congratulations to June, now in her second PhD year, who has had her paper with Chris Hawes (former member of the TG Group and now and independent lecturer at the School of Chemical and Physical Sciences, Keele University, UK, named “Crystallographic studies of 2-picolyl substituted naphthalene diimide and bis-phthalimide ligands and their supramolecular coordination chemistry”, accepted for publication in CrystEngComm (DOI: 10.1039/C8CE01756E). This work is another excellent outcome of a very fruitful collaboration between the group and Chris, based on exploring the supramolecular application of naphthalene-based building blocks with various d-metal ions, featuring extended analysis of the various complexes formed by using single crystal structure analysis, but Chris was instrumental (as well as Brendan Twamley) in training several members of the TG group in carrying out their own X-ray analysis.
Many congratulations to Dr. Sankarasekaran Shanmugaraju (Raju), Dr. Bjørn la Cour Poulsen (former PhD student), Dr. Aramballi J. Savyasachi, Hannah L. Dalton and Dr. Chris Hawes (now at Keele University, UK) who have in collaboration with Prof. Graeme Watson and Dr. D. Umadevi (School of Chemistry, TCD) have had their paper entitled: “Synthesis, structural characterisation and antiproliferative activity of a new fluorescent 4-amino-1,8-naphthalimide Tröger’s base-Ru(II)-curcumin organometallic conjugate” accepted for publication in Chem. Commun.
In this communication, they have reported the synthesis, photophysics and biological investigation of fluorescent 4‐amino‐1,8‐naphthalimide Tröger’s bases and a new Tröger’s base p‐cymene‐Ru(II)‐curcumin organometallic conjugate; these compounds showed fast cellular uptake and displayed good luminescence and cytotoxic against cervical cancer cells.
The journal Chem. Commun. is published by the RSC and the paper is now available online for early view: 10.1039/C8CC01584H
The Gunnlaugsson Group attended the Supramolecular Chemistry Ireland (SCI 2017) conference in Maynooth University yesterday. The conference, organised by former group member Dr Rob Elmes, brought together an array of international speakers for a jam-packed day of lectures and short talks.
Several members of the group presented their work at the poster session, with second year PhD student Hannah Dalton giving a flash talk on “Metallosupramolecular assemblies of a family of N,N,O–terdentate ligands”, work which was recently published in Crystal Growth and Design.
Many congratulations to Isabel Hegarty, who beat a tough field to win the prize for best poster, for her poster entitled “Lanthanide Directed Self-Assembly of a Series of btp Derivatives”
A sample of the naphthalimide-based hydrogel
Congratulations to Chris and Amy from the TG group, as well as collaborators Kevin Byrne and Prof. Wolfgang Schmitt (TCD School of Chemistry and CRANN) and Dr Gavin Ryan and Prof. Matthias Möbius (TCD School of Physics) for their recent publication in Chemical Communications entitled “A resilient and luminescent stimuli-responsive hydrogel from a heterotopic 1,8-naphthalimide-derived ligand”. This work describes the synthesis of a fluorescent naphthalimide-containing gelator which forms robust hydrogels in the presence of potassium ions. As well as a rare example of a hydrogelator containing no hydrogen bond donors, this material exhibits the useful property of chemical reversibility, where 18-crown-6 and potassium chloride can be used to disrupt or re-form the gel, respectively.
Structure of the tetrameric [Zn4(L)4]8+ cation investigated in the work.
Congratulations to Dawn, Chris, Bjø
rn and Joe for their recent paper in Dalton Transactions titled “A folded [2 × 2] metallo-supramolecular grid from a bis-tridentate (1,2,3-triazol-4-yl)-picolinamide (tzpa) ligand
“. In this work, a new flexible bis-tridentate donor ligand containing 1,2,3-triazolyl-picolinamide (tzpa
) binding sites was developed, which contained structural elements from two of the group favorites 2,6-dipicolinamide (dpa
) and 2,6-bis-(1,2,3-triazolyl)pyridine (btp
). The new ligand was then used in the formation of a tetranuclear grid with Zn(II) or Fe(II) ions, which was probed with X-ray diffraction, NMR, UV-Visible spectroscopy and mass spectrometry. It also involved a productive collaboration with Dr Manuel Reuther and Dr John O’Brien from the NMR Spectroscopy Facility
in TCD, who provided help in understanding the solution behavior of the material using the T1
spin-lattice relaxation parameter in 1
H NMR spectroscopy.
Congratulations to June Lovitt, Chris Hawes and Amy Lynes on their new paper in Inorganic Chemistry Frontiers, entitled ‘Coordination chemistry of N-picolyl-1,8-naphthalimides: colourful low molecular weight metallo-gelators and unique chelation behaviours‘. June has spent the last six months as a research student in our lab, and has now returned to the University of Southampton to complete her studies. We all hope to see June again soon, but in the meantime we would like to wish her best of luck in all her future endeavours!
Transparant low molecular weight metallogels such as the one pictured (green) were formed from N-picolyl-1,8-naphthalimides
Amy and Chris recently gave talks at the School of Chemistry’s first annual Intra Postgraduate/Post-Doctoral Colloquium Day and Networking Event. The event was well attended by those in the School of Chemistry and many members of the Gunnlaugsson group presented posters in the poster session in the afternoon.
Also that evening, Amy won the Barry-McCabe Demonstrating prize for teaching first year undergraduates last year. Congratulations to Amy on this wonderful achievement!
Amy (centre) with Head of School Sylvia Draper (third from right), Tom McCabe (second from right) and Brendan Barry (far left)