Louis McNamara Chemistry and Biochemistry University of Mississippi SPECTROSCOPIC INVESTIGATION OF THE EFFECTS OF ENVIRONMENT ON NEWLY DEVELOPED EMISSIVE MATERIALS Louis McNamara Chemistry and Biochemistry University of Mississippi

Compounds ccc-pincer complex Poly-PDIB-SSQ nanostructures DSC’s

Set up for changes in environment Pulse valve Gas Inlet Pressure Gauge Slide (w/ sample) Fluorescence Valve Objective Light Source Mirror Mini-Turbo Pump CCD Camera

Set up for changes in environment Pulse valve

Novel emissive pincer complexes Hollis group (Miss. State) Tunable and stable emissive materials in technologies such as lasers and displays Complexes usually contain either Ni, Pd or Pt Ln = Cl, Br, I or CO

Techniques and properties Interested in tracking changes in PL quantum yield, PL lifetime, absorption, emission and photostability Probe solids, liquids and pincer complexes with varying metals/ligands and in different atmospheres

Techniques and properties Interested in tracking changes in PL quantum yield, PL lifetime, absorption, emission and photostability Probe solids, liquids and pincer complexes with varying metals/ligands and in different atmospheres

Techniques and properties Lifetimes tend to be longer and absorbance tends to be more red in solid state then when dissolved in methanol or DCM

Polymer Nanoarrays Look at how aggregation affects the photophysics of semiconducting nanoarrays Samples were spin coated onto slides after being dissolved in solutions of 1:0, 1:1, and 0:1 ratios methanol:chloroform

Polymer Nanoarrays Look at how aggregation affects the photophysics of semiconducting nanoarrays Samples were spin coated onto slides after being dissolved in solutions of 1:0, 1:1, and 0:1 ratios methanol:chloroform

Polymer Nanoarrays Look at how aggregation affects the photophysics of semiconducting nanoarrays Samples were spin coated onto slides after being dissolved in solutions of 1:0, 1:1, and 0:1 ratios methanol:chloroform

Sensitizer dyes for solar cells The photophysics of sensitizer dyes will be examined in collaboration with the Delcamp Fluorescence lifetimes are of primary interest Look at lifetimes of dyes in solution and on TiO2 in order to determine the injection efficiencies

Acknowledgements