Daqing Gan

Date of Award


Degree Name

Master of Arts



First Advisor

Dr. Marc W. Perkovic

Second Advisor

Dr. John E. Chateauneuf

Third Advisor

Dr. Donald R. Schreiber

Access Setting

Masters Thesis-Open Access


A series of new ruthenium bipyridyl crown supramolecular sensor systems containing two binding sites were synthesized. The crystal structure and photophysical properties of the developed sensor systems were thoroughly studied using x-ray, nuclear magnetic resonance and photoscopy methods. It turned out that the chelation of transition metal on the remote sites of the bipyridyl crown ligands greatly reduced the reactivity of the crown cavity. It is believed that the chelation of transition metal on the nitrogen atoms forces the bipyridyl function towards coplanarity and restricts the conformational freedom of the crown ring. The conformational rigidity in turn influences the binding capability of the crown. It is significant to note this allosteric effect on the development of conformational tunable sensor systems.

Included in

Chemistry Commons