Overview
Our research involves the synthesis of compounds, supermolecular assemblies, nano-scale objects, and electronic materials with unusual ground-and excited-state characteristics, and interrogating these structures using state-of-the-art transient optical, spectroscopic, photophysical, and electrochemical methods. Research activities span physical inorganic chemistry, physical organic chemistry, synthetic chemistry, bioinorganic chemistry, spectroscopy, photophysics, excited-state dynamics, spintronics, and imaging. My laboratory: (i) designs chromophores and supermolecules that display exceptional opto-electronic properties and elucidates their excited-state dynamics, (ii) engineers highly conjugated molecular structures for optical limiting, specialized emission, and high charge mobility, (iii) designs conjugated materials and hybrid molecular-nanoscale structures for energy conversion reactions, (iv) develops molecular wires that propagate spin-polarized currents, (v) fabricates emissive nanoscale structures for in vivo optical imaging, (vi) engineers de novo transition metal cofactor-binding proteins that test light-driven biological energy transducing mechanisms and realize opto-electronic functionalities not found in nature, and (vii) designs and interrogates complex molecular and nanoscale assemblies in which ultrafast energy and charge migration reactions are controlled by quantum coherence effects.
Current Appointments & Affiliations
Recent Publications
De Novo Design of Proteins That Bind Naphthalenediimides, Powerful Photooxidants with Tunable Photophysical Properties.
Journal Article Journal of the American Chemical Society · March 2025 De novo protein design provides a framework to test our understanding of protein function and build proteins with cofactors and functions not found in nature. Here, we report the design of proteins designed to bind powerful photooxidants and the eva ... Full text CiteCoherence in Chemistry: Foundations and Frontiers.
Journal Article Chemical reviews · November 2024 Coherence refers to correlations in waves. Because matter has a wave-particle nature, it is unsurprising that coherence has deep connections with the most contemporary issues in chemistry research (e.g., energy harvesting, femtosecond spectroscopy, molecul ... Full text CiteFluence-Dependent Photoinduced Charge Transfer Dynamics in Polymer-Wrapped Semiconducting Single-Walled Carbon Nanotubes.
Journal Article Journal of the American Chemical Society · November 2024 Because an individual single-walled carbon nanotube (SWNT) can absorb multiple photons, the exciton density within a single tube depends upon excitation conditions. In SWNT-based energy conversion systems, interactions between excitons and charges make it ... Full text CiteRecent Grants
Electron Spin Selectivity of Chiral Matter, from Molecules and Supramolecular Assemblies to Life
ResearchPrincipal Investigator · Awarded by University of Pittsburgh · 2023 - 2026Characterization of Chiro-optic and Dynamical Responses of Bespoke Semiconducting Materials for Spin Transport and Long-Wavelength Information Transmission
EquipmentPrincipal Investigator · Awarded by Air Force Office of Scientific Research · 2025 - 2026De Novo Protein Energy Transducing Biomachines Enabled via Controlled Bifurcon Flow
ResearchPrincipal Investigator · Awarded by W.M. Keck Foundation · 2022 - 2025View All Grants