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.
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.
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!
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.
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”.