Many congratulations to Oxana, Sam and Sachi, who had their invited Frontier article accepted in Dalton Transaction, “Recent advances in the development of luminescent lanthanide-based supramolecular polymers and soft materials” (Dalton Trans., 2018, 47, 16377-16387. DOI:10.1039/C8DT03768J). This work reviews some of the most recent use of luminescent lanthanides ions as crosslinking moieties to generate functional soft materials, giving the readership of Dalton a fantastic inside into this fast-growing area of material research.
Many congratulations to Trinity College Dublin team Dr. Oxana Kotova, Dr. Steve Comby, Dr. Komala Pandurangan (now at Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR)), Dr. Floriana Stomeo (now at IPSEN Pharma), Dr. John E. O’Brien and Dr. Martin Feeney who in collaboration with Dr. Robert D. Peacock from University of Glasgow and Prof. Colin P. McCoy from Queen’s University Belfast who have had their paper entitled “The effect of the linker size in C2-symmetrical chiral ligands on the self-assembly formation of luminescent triple-stranded di-metallic Eu(III) helicates in solution” accepted in Dalton Transactions.
The article discussed the formation of chiral, luminescent [Eu2:L3] assemblies with high stability constants in solution. However, it was found that the composition of the assemblies in the solid state was more complex. The chirality of the studied systems allowed us to investigate their formation using various techniques including circular dichroism and circularly polarised luminescence spectroscopies and help their development towards materials for the applications in electronics for virtual reality applications (3D screens) and in medical diagnostic.
The article is available online at: https://pubs.rsc.org/en/content/articlelanding/2018/dt/c8dt02753f#!divAbstract
PhotoIUPAC, the biennial global IUPAC conference for photochemistry, came to UCD this July (8th – 13th, 2018) and several TG members contributed throughout the week. Post-doctoral researchers Dr. Oxana Kotova and Dr. Sam Bradberry gave talks titled “Effect of Spacer Size in Chiral Luminescent Di-metallic Eu(III) Helicates” and “Supramolecular Scaffolds for Lanthanide Luminescence”, respectively, describing some of the research they have undertaken recently in the group.
PhD student Sandra Estalayo presented a poster on the Ru(II) complexes for singlet-oxygen generation work that she has been carrying out in her PhD in close collaboration with Prof. John Kelly (TCD). Working backstage, PhD students Jason Delente and Isabel Hegarty volunteered to help run the four parallel sessions throughout the week. The group were exposed to exciting and varied science from all corners of the globe, early career researchers and established names from every field of photochemistry, in what was an excellent and diverse programme of talks.
The conference, at its 27th edition, was organised by Dr. Susan Quinn of UCD and Prof. Miguel A. Garcia-Garibay from UCLA. It showcased world-class research in photochemistry with contributors from over 40 countries and was a very stimulating meeting. The 28th meeting will be held in Amsterdam in 2020. See you there, PhotoIUPAC!
Dr Oxana Kotova attended the 12th International Symposium on Macrocyclic and Supramolecular Chemistry in conjunction with ISACS: Challenges in Organic Materials & Supramolecular Chemistry, which was held this year in Cambridge Corn Exchange & Guildhall. There she presented a poster entitled “Discrete white-light-emitting Ln-based heterometallic assemblies in solution”. This work was recently published in Chemical Science. The conference included talks from various internationally renowned researchers including Nobel Laureate Prof. Fraser Stoddart, Prof. François Diederich, Prof. Harry Anderson, Prof. David Leigh and Prof. Vivian W.W. Yam amongst many other excellent chemists. Thanks to the organising committee for the excellent meeting.
Punting on the River Cam
Oxana presenting her poster
Trinity College Cambridge
Vivian W W Yam
Harry Anderson won the Izatt Christensen Award
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”
Congratulations to Laura (now at Pfizer), Sam, Steve and Oxana on their new communication published in ChemPhysChem. In this work, invited to a special issue on Molecular Logic, AuNPs were described that were functionalised with Eu(III) and Tb(III) cyclen complexes which were able to function as molecular logic gate mimics (MLGMs). Two MLGMs were reported operating using pH and organic molecule inputs, respectively, which were able to mimic half-subtractor, transfer and XOR logic functions.
Logic and Molecular logic have important history in Ireland, with George Boole developing his ideas in UCC (formerly Queen’s College Cork) and the early ideas of PET sensors as MLGMs being introduced by Prof. A.P. de Silva in Queen’s University Belfast. The TG Group has described a number of MLGMs over the years, most recently in materials systems such as our organogel-based system reported in Chem. Commun. last year. Our paper in ChemPhysChem is a further demonstration of the use of materials-supported Ln(III) luminescence, this time on AuNP surfaces and the power of logical analysis as an approach to supramolecular and sensing chemistry.
ChemPhysChem is a ChemPub Soc Europe journal, a consortium of 16 continental European chemical societies and published in collaboration with Wiley-VCH, and we are happy to have contributed to high impact European science.
Varying the colour of the emission by altering the molar fraction of europium in the system (𝛘Eu)
Congratulations to Oxana Kotova, Steve Comby and Christophe Lincheneau on their paper entitled “White-light emission from discrete heterometallic lanthanide-directed self-assembled complexes in solution” which has been accepted into the RSC journal Chemical Science. In this work, the newly designed multidentate ligand tdt was used, which provides three individual tridentate binding sites for lanthanide (Ln) ions. White-light emission was successfully achieved by carefully tuning (i) the molar ratio of Eu(III) and Tb(III) within the assembly and thus the relative intensity of the red and green emission, (ii) the excitation wavelength, as the tdt ligand consists of two different chromophores, and (iii) the ligand concentration, which greatly affects the intensity of the blue emission within the overall self-assembled complexes. We envisage that this system can be further developed and find its application as white-light emitting material or as a ratiometric sensor.
We would like to welcome two new students, Tony Duggan and Céline Ruijs, to the Gunnlaugsson group. Tony is a 3rd
year Pharmaceutical Healthcare
student from DIT on placement in the group from January until May. Céline is a 4th
year Chemistry student from Université Catholique de Louvain
and will be doing an internship until May. Both of them are working on self-assembly projects with Oxana
Aisling completed her two month summer project within the Gunnlaugsson group which she started on 6th of June and finished on 29th of July 2016. She has been an excellent addition to the group and has been working on the synthesis of tripodal terpyridine-based ligands for the formation of supramolecular polymers and gels with Sachi and Oxana. We wish her the very best of luck in her future studies and endeavors!
Homemade thank you card from Aisling
Sachi, Aisling and Oxana
Oxana represented the TG Group at the 5th International Conference on Molecular Sensors and Molecular Logic Gates (MSMLG 2016) in the Chancellor’s Building at the University of Bath. The conference was attended by over 250 delegates from host of countries such as the United Kingdom, Ireland, France, Germany, Italy, Spain, Poland, USA, Canada, Japan, China, Korea and Israel.
Prof. de Silva presenting
Oxana and fellow delegates at conference banquet
Delegates were treated to plenary lectures including talks from Prof. J. Fraser Stoddart, Prof. Eric V. Anslyn, Prof. Mihail Barboiu, Prof. Christopher J. Chang, Prof. A. Prasanna de Silva, Prof. Philip A. Gale, Prof. Bruce Gibb, Prof. Katrina A. Jolliffe, Prof. Ben Zhong Tang and Prof. He Tian amongst others. Oxana presented her results on “Self-Assembly of Europium(III) With Chiral Asymmetrically Substituted Ligands in Solution and Formation of Langmuir-Blodgett Monolayers”.