New paper in Organic Letters on anion mediated synthesis of 3-amino-[1,2,4]-triazolo pyridines from our group

Many congratulations to present and former members of our group Komala, Anna, Devis, Jon, Miguel and Salvador for their recent publication, Supramolecular Anion Recognition Mediates One-Pot Synthesis of 3-Amino-[1,2,4]-triazolo Pyridines from Thiosemicarbazides, in Organic Letters!. This work was done through a collaboration of Prof. Gunnlaugsson and Prof. Eoin Scanlan and showed how supramolecular interactions with F (as tetrabutylammonium fluoride, TBAF) of a series of thiosemicarbazides could lead to the formation of 3-amino-[1,2,4]-triazolo pyridines. The synthesis of these heterocycles was obtained in a one-pot reaction from variously substituted hydrazine pyridine and isothiocyanates in the presence of TBAF.

heterocycle

Crystal structures of thiosemicarbazides and 3-amino-[1,2,4]-triazolo pyridines.

Three new papers accepted for publication from the group

Many congratulations to Bjørn C. Poulsen, Sandra Estalayo-Adrián, Salvador Blasco and Sandra A. Bright, who in collaboration with Professors John Kelly and Clive Williams have had their manuscript “Luminescent ruthenium polypyridyl complexes with extended ‘dppz’ like ligands as DNA targeting binders and cellular agents”, accepted in the RSC journal Dalton Transactions. DOI: 10.1039/c6dt03792e. The work was mainly funded under the SFI PI scheme (2013), the IRC (Postgraduate fellowship to BCP) and via the Marie Curie Fellowship Programme (to SB).

bcp-sea-dppz_like_ligands

Six dppz-like ligands investigated as DNA targeting binders and cellular agents.

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Fluorescence Emission spectra in aqueous dispersions.

Many congratulations to Raju (Sankarasekaran Shanmugaraju) on the acceptance of his manuscript “Tröger’s base derived coordination zinc polymer for fluorescent sensing of phenolic-nitroaromatics explosives in water”. This work was funded in part though an IRC postdoctoral fellowship to Raju and comes out of a very fruitful collaboration between the TG research group and the Schmitt Group at TCD and the Kitchen Group at University of Southampton. The work is in part based on results obtained by a visiting student Charlyne Dabadie, who under Raju’s supervision spent 6 months in the TG laboratory in 2015, and is to be published in the RSC journal Chemical Science. DOI: 10.1039/C6SC04367D

flexible-coord-polymers-csh

Ligand geometry, coordination environment and partially extended structure of a naphthalimide-based coordination polymer.

Many congratulations to Chris Hawes on his manuscript “Flexible porous coordination polymers from divergent photoluminescent 4-oxo-1,8-naphthalimide ligands”, that has been accepted for publication in the ACS journal Inorganic Chemistry. DOI: 10.1021/acs.inorgchem.6b02137. The work was made possible through a postdoctoral fellowship award to Chris from IRC and through the TCD Dean of Research Pathfinder Programme; the work being carried out in part in collaboration with the Schmitt research group in TCD.

Two publications accepted from the group in Crystal Growth & Design and Chemical Communications

Many congratulations to Chris, Dawn and Salvador who had their paper “Structure direction, solvent effects and anion influences in halogen-bonded adducts of 2,6-bis(iodoethynyl)pyridine” accepted in the ACS journal Crystal Growth & Design and to Esther and Steve who had their paper “Cyclen lanthanide-based micellar structures for application as luminescent [Eu(III)] and magnetic [Gd(III)] resonance imaging (MRI) contrast agents” accepted in the RSC journal Chemical Communications. Both papers represent new areas within the TG research group; the former being the first publication from the group on the use of halogen bonding in self-assembly formation, while the latter presents the first examples of the formation of lanthanide based self-assembly micelles. This contribution was also the 200th to be accepted from the TG group. Well done to you all!

200th_and_201st_papers

TG Group say farewell to Salvador and Sandra

Dr. Sandra Bright and Dr. Salvador Blasco had their last day in the TG Group and were given a fond farewell by current members at specially organised lunches.

Sandra was the group’s biochemist who investigated group member’s compound’s biological activity for cancer treatment and signalling in the development of cancer therapeutic agents.

Salvador was the group’s resident crystallographer for a time and a post-doc with an indispensible expertise in electrochemistry Ru(II) polypyridyl chemistry, very much involved in the work of PhD students, Bjorn and Sandra, having also collaborated closely with Prof. Clive Williams in the Department of Biochemistry, TCD. He has contributed to the wealth of the group’s research with many publications including Chemical Science,2014,  6 (1), 457-471 (DOI: 10.1039/C4SC02474E ) and Angew.Chem. Int.Ed. 2016, 55,8938 –8943  (DOI: 10.1002/anie.201603213 )

We wish them all the best with their future endeavors.

 

Crystal Growth and Design article accepted

Many congratulations to Drs. Chris Hawes, Dawn Barry and Salvador Blasco on their paper “Structure direction, solvent effects and anion influences in halogen-bonded adducts of 2,6-bis(iodoethynyl)pyridine” that has been accepted for publication in the ACS journal Crystal Growth & Design. This is the first contribution from our group studying halogen bonding interactions in the crystalline phase using ‘designed ligands’, and their application in the formation of novel self-assembled supramolecular structures using anion templation chemistry.

A one-dimensional halogen-bonded assembly between the iodoethynyl donor and chloride acceptors, encapsulating tetrabutylammonium cations.

A one-dimensional halogen-bonded assembly between the iodoethynyl donor and chloride acceptors, encapsulating tetrabutylammonium cations.

 

Dalton Transactions Accepted

Good news on the publication front as Eoin, Chris, Salvador and Thorri can celebrate the acceptance of their article, “Synthesis and structural studies of 1,4-di(2-pyridyl)- 1,2,3-triazole dpt and its transition metal complexes;  a versatile and subtly unsymmetric ligand” in Dalton Transactions.

Graphical Abstract

Graphical Abstract

The full paper details Eoin’s work into the structural analysis of the 1,4-di(2-pyridyl)-1,2,3-triazole ligand and its transition metal complexes of varying lability and demonstrates the coordination chemistry selectivity of this subtly unsymmetric ligand.

Incidentally, this makes for Chris’ first publication in the TG Group, wherein his expertise in X-ray diffraction analysis was indispensable.

Self-templated btp [2]Catenane Article Accepted for Publication in Angewandte Chemie

SI_Animation

Self-templated btp [2]catenane

Many congratulations to Joseph P. Byrne, Salvador Blasco, Anna B. Aletti and Gary Hessman on their publication “Formation of Self-Templated 2,6-Bis(1,2,3-triazol-4-yl)pyridine [2]Catenanes by Triazolyl Hydrogen Bonding: Selective Anion Hosts for Phosphate” that has been accepted for publication in the prestigious chemistry journal Angewandte Chemie.

 

 

Abstract: We report the remarkable ability of 2,6-bis(1,2,3-triazol-4-yl)pyridine (btp) compounds with appended olefin amide arms (2) to self-template the formation of interlocked [2]catenane structures (3) in yields of up to 50% when subjected to olefin ring-closing metathesis in CH2Cl2. X-ray diffraction crystallography allowed structural characterisation of both the [2]catenane 3a and the non-interlocked macrocycle 4a. These [2]catenanes show selective triazolyl hydrogen bonding interactions with the tetrahedral phosphate anion when screened against a range of ions; 3a and b being the first examples of selective [2]catenane hosts for phosphate.