This thesis document is comprised of three research projects. The first investigates the active vibrational modes involved in twisted intramolecular charge transfer in a Julolidine-BODIPY dyad using two-dimensional electronic spectroscopy along with DFT calculations. We identified two types of vibrations, compression and torsional motion, as playing an important role in this intramolecular charge transfer. The second project examines a four-pathway donor-acceptor compound, an extended perylene core connected to four naphthalene diimide units, in solution and in a single crystal using transient absorption and transient absorption microscopy spectroscopies. By comparing this multi-pathway system to its single-pathway analogue in solution, we concluded that the four acceptor units do not interact with one another in solution where the ensemble of molecules is dispersed throughout the solution. In a single crystal, however, the extremely long-lived charge separated state lifetime suggests charge migration across electron acceptor units. The third project studies a Zn-porphyrin dimer with two porphyrin units connected to a triptycene bridge that locks them into a co-facial geometry, with a single benzoquinone electron acceptor. There is significant evidence of porphyrin-porphyrin interaction in this dimer system and with the fast charge separation rate, we hope to see evidence of coherent multi-pathway electron transfer at cryogenic temperatures in a glassy matrix in the two-dimensional electronic spectroscopy data.

Creator

• Fisher, Jeremy

DOI

• https://doi.org/10.21985/n2-mp6p-5b46

Subject

• Organic chemistry
• Physical chemistry
• Chemistry

Language

• en

Alternate Identifier

• http://dissertations.umi.com/northwestern:16773
• etdadmin_upload_1014057

Date created

• 2023-01-01

Resource type

• Dissertation

Rights statement

• In Copyright