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US 5,789,592 AGranted
Phosphonated polypyridyl compounds and their complexes
AssigneeEcole Polytechnique Federale de Lausanne
InventorsMichael Gratzel, Oliver Kohle, Mohammad K. Nazeeruddin, Peter Pechy, Francois P. Rotzinger, Stephan Ruile, Shaik Mohammad Zakeeruddin
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Abstract
A compound in metal-free or metal complex form of formula (1) to (3) in which R is hydrogen or C.sub.1-30 alkyl; X is hydrogen, halogen (preferably Cl or Br) or C.sub.1-30 alkyl. ##STR1##
Claims1
A compound, in metal-free form, of formula 1 to 3 ##STR5## In which R is hydrogen or C.sub.1-30 alkyl;
- X is hydrogen, halogen (preferably Cl or Br) or C.sub.1-30 alkyl.
Dependencies are inferred from the claim text.