Recent developments in research concerning organic photovoltaics (OPVs) have overseen massive increases in device performance and the ascension of electron acceptor materials that outclass the preeminent acceptor compounds, buckminsterfullerene (C60) derivatives. New design strategies in the molecular structure of perylenediimides (PDIs) and fused-ring electron acceptors (FREAs) have increased single-junction photovoltaic...
In this Thesis, I describe some recent developments in the field of artificial molecular machines to which I have made contributions. In Chapter 1, I survey the rise and promise of molecular nanotopology, a relatively new discipline focusing on molecular knots and links that offers unprecedented opportunities to access high-energy...
When a collection of individual units behave synchronously, it is often useful to describe the actions of the group. Broadly speaking in Physics, individuals are described as particles and collective actions are described using waves. However, the dynamic symphony of life ordains that orchestral sections play in harmony for a...
Spin-orbit coupling (SOC) underlies myriad phenomena in chemistry and physics. Arbitrary manipulation of spin-orbit coupling would enable precise control over such parameters as magnetic anisotropy, the sensitivity of quantum sensors, and even the selectivity of certain catalytic processes. Herein, I describe my efforts directed towards utilizing SOC as a handle...
Although electrostatics interactions in fluids have been studied for many decades, new results in this field are still challenging our classical understanding of electrolytes. The combination of electrostatics and self-assembly yields many interesting yet challenging problems that are of fundamental scientific interest and show promise for industrial applications. In this...
The three dimensional structure of a protein determines its biological function. How a protein folds, however, has been the central research problem for decades. The intermediates on the folding paths, which the protein can assume transiently, are of particular interest as they not only reveal the structural dynamics of a...
This dissertation describes the study of photoinduced charge transfer between QDs and molecular acceptors as a probe of the defects within ligand shells of QDs and as means to photocatalyze redox reactions. For charge transfer reactions to occur between QDs and molecules in bulk solution, the molecules must interact with...
Over the past 15 years, there have been significant developments in expanding the singlet fission (SF) library and understanding the SF mechanism. SF has been a topic of interest in recent years due to its potential applications in organic photovoltaics. During SF, a singlet exciton energetically down-converts into two triplet...
This dissertation examines the effects of phase transfers with thiol ligands on the optical properties of quantum dots (QDs) in water by investigating two systems: i) dihydrolipoic acid (DHLA)-capped PbS QDs and ii) thiolated DNA-capped core/shell CdSe/CdS QDs. QDs are bright, monodisperse, and tunable hydrophobic nanoparticles with high photoluminescence (PL)...
Singlet Fission (SF) is a down-conversion process in organic chromophores where one high-energy singlet exciton is converted into two low-energy triplet excitons. Such carrier multiplication aspects of SF are promising in increasing the solar cell efficiency. The generation of two bound spin triplet states from the same singlet exciton also...