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Details of Grant 

EPSRC Reference: GR/R33182/02
Title: New hybrid phenanthroline/macroline ligands for supramolecular photochemistry
Principal Investigator: Ward, Professor MD
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department: Chemistry
Organisation: University of Sheffield
Scheme: Standard Research (Pre-FEC)
Starts: 01 August 2003 Ends: 30 September 2004 Value (£): 29,161
EPSRC Research Topic Classifications:
Co-ordination Chemistry
EPSRC Industrial Sector Classifications:
Electronics
Related Grants:
Panel History:  
Summary on Grant Application Form
This project is to prepare an extensive new series of ligands in which the peripheral (OH)2 site of 5,6-dihydroxynaphthalene is converted to a crown-ether type macrocycle or a cryptand by reaction with ditosylates of the form Ts0(CHZCH2X)nCHZCH20Ts. By varying the number (n) and nature (X = 0, S, NH) of the donor sets an unprecedented variety of ligands can be prepared which contain a macrocyclic or cryptand site with up to three externally-directed phenanthroline units for attachment to luminophoric fragments such as {Ru(bipy)2)z+, (Re(CO)3CI) or {Ru(CN)4)2-. The effects of attaching secondary metal ions to the macrocycle on the luminescence and redox properties of the luminophore will be examined, as well as the possibility of inter-component photoinduced electron- and energy-transfer to transition-metal ions. Further conversion of the aza-crowns (X = NH) to polyaminocarboxylates will provide an effective binding site for luminescent lanthanide ions such as Tb, Nd and Y such that Ru/lanthanide energy-transfer can be evaluated. The possibility of attaching quencher groups to the luminophores via H-bonding to the pendant crown ether, which will allow photoinduced processes to occur between non-covalently assembled components, will also be investigated.
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Organisation Website: http://www.shef.ac.uk