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”.
Anna Aletti, Samuel Bradberry and Dr. Oxana Kotova of the TG group attended Southampton Supramolecular Chemistry Symposium on the 24th of June 2016.
Southamption Supramolecular Symposium 2016 Delegates
All of them presented posters and, in addition, Samuel gave an excellent talk on “Lanthanide Luminescent Logic – functional organic scaffolds and soft polymers gels as logic gate mimics”.
Sam giving his talk
Sam and A P at the poster session
Oxana with her poster
Anna presenting her poster
A P de Silva, Oxana, Anna, Joe and Sam at the drinks reception
Our former group member Dr. Joseph Byrne who is currently a postdoctoral researcher in the University of Bern attended the conference as well and presented a poster on his recent work published in Angew. Chem. Int. Ed. on self-templated btp Catenane.
The meeting included speakers and posters from UK Universities and beyond, including an outstanding lecture from the plenary speaker Professor A. P. de Silva.
Visiting student, Agostino Galanti, from Bologna, Italy who conducted his master’s research project in the TG Group between March-September 2014, under the guidance of Dr. Oxana Kotova, has recently had his work accepted for publication in Chemistry – A European Journal.
The work entitled ‘Exploring the Effect of Ligand Structural Isomerism in Langmuir-Blodgett Films of Chiral Luminescent Eu(III) Self-Assemblies’ was carried out in collaboration with Chloe J. Johnson from Prof. Martin Albrecht‘s group in the University of Bern, Switzerland, Shaun Mills from Prof. John J. Boland‘s group, CRANN and Prof. Robert D. Peacock in the University of Glasgow.
Agostino has gone on to conduct a PhD in Prof. Paolo Samori‘s group in the University of Strasbourg and was a pleasure to work with during his time with the TG Group and we wish him all the best for the future.