A5025648779- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Luminescence and Fluorescent Materials
- Synthesis and Properties of Aromatic Compounds
- Photochromic and Fluorescence Chemistry
- Covalent Organic Framework Applications
- Supramolecular Chemistry and Complexes
- Metal-Organic Frameworks: Synthesis and Applications
- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Crystallography and molecular interactions
- Porphyrin and Phthalocyanine Chemistry
- Photoreceptor and optogenetics research
- High-Temperature Coating Behaviors
- Fullerene Chemistry and Applications
- Plant-based Medicinal Research
- Advanced Chemical Physics Studies
- Surface Chemistry and Catalysis
- Advanced Photocatalysis Techniques
- Atmospheric aerosols and clouds
- Molecular spectroscopy and chirality
- Phase Change Materials Research
- Gas Sensing Nanomaterials and Sensors
- Spectroscopy and Quantum Chemical Studies
- Organic Electronics and Photovoltaics
Harvey Mudd College
2024
Northwestern University
2020-2022
University of Wyoming
2016-2022
City College of New York
2018
City University of New York
2018
City College
2018
National Renewable Energy Laboratory
2016
We report the encapsulation of free-base and zinc porphyrins by a tricyclic cyclophane receptor with subnanomolar binding affinities in water. The high are sustained hydrophobic effect multiple [CH···π] interactions covering large [π···π] stacking surfaces between substrate receptor. discovered two co-conformational isomers 1:1 complex, where porphyrin is orientated differently inside cavity on account its nature. photophysical properties chemical reactivities encapsulated modulated to...
Significance During the past decades, development of efficient methodologies for creation mechanically interlocked molecules (MIMs), such as catenanes and rotaxanes, has not only laid foundation design syntheses artificial molecular machines (AMMs) but also opened up new research opportunities in multiple disciplines, ranging from contemporary chemistry to materials science. In this study, we describe a suitane-based strategy construction three-dimensional (3D) catenanes, subset MIMs that...
Polar and polarizable π-conjugated organic molecules containing push–pull chromophores have been investigated extensively in the past. Identifying unique backbones building blocks for fluorescent dyes is a timely exercise. Here, we report synthesis characterization of series quadrupolar A–D–A constitutions (where A = acceptor D donor), which exhibit fluorescence emission at variety different wavelengths. We effects electron-withdrawing groups, located both termini para-terphenylene backbone,...
The syntheses of isomeric helical viologens that have potential applications in supramolecular chemistry and catalysis been developed. structures the molecules their solid-state packing motifs determined by X-ray crystallography. Computational studies demonstrate magnitude racemization barriers is primarily identity scaffold insensitive to placement viologen functional group. isomers are similar photophysical behavior but very different photochemical behavior.
Abstract Efficient heterogeneous photosensitizing materials require both large accessible surface areas and excitons of suitable energies with well‐defined spin structures. Confinement the tetracationic cyclophane (ExBox 4+ ) within a nonporous anionic polystyrene sulfonate (PSS) matrix leads to area increase up 225 m 2 g −1 in ExBox•PSS. intersystem crossing is achieved by combining spin‐orbit coupling associated Br heavy atoms 1,3,5,8‐tetrabromopyrene (TBP), photoinduced electron transfer...
Effective heterogeneous photocatalysts capable of detoxifying chemical threats in practical settings must exhibit outstanding device integrity. We report a copolymerization that yields robust, porous, processible, chromophoric BODIPY (BDP; boron-dipyrromethene)-containing polymers intrinsic microporosity (BDP-PIMs). Installation pentafluorophenyl at the meso position BDP produced reactive monomer when combined with 5,5,6,6-tetrahydroxy-3,3,3,3-tetramethyl-1,1-spirobisindane (TTSBI) and...
Guaiacol, present in wood smoke, readily forms secondary organic aerosol (SOA), and, the aqueous phase, brown carbon (BrC) species. Here, BrC is produced an illuminated chamber containing guaiacol(g), HOOH(g) as OH radical source, and either deliquesced salt particles or guaiacol SOA at 50% relative humidity. production slows without source (HOOH), likely due to low levels of generation by photosensitization, perhaps involving surface-adsorbed dissolved oxygen. With HOOH, mass absorption...
The regiochemistry of four bis-Mallory photocyclization substrates has been examined from experimental and computational perspectives. Formation all three possible regioisomers was only observed in the reaction one substrates. In other substrates, two C2-symmetric products, but not C1 product, were formed. reactions that formed temperature could be used to select for exclusive formation or regioisomer. use between also worked substrate products. However, no located third component, which...
We examine the dynamics of sol–gel transition for end-functionalized linear- and 4-arm-peptides bioconjugated to poly-ethylene glycol (PEG) in aqueous environments with increasingly chaotropic (Cl<sup>−</sup> < Br<sup>−</sup> I<sup>−</sup>) anions.
Abstract Hybrid polyaromatic hydrocarbons (PAHs) consisting of helicene and acene domains, referred to as [7]heli‐D‐acenes, are introduced scaffolds generate enantiopure twisted acenes (heli‐twistacenes) by a torque, lock, propagate (TLP) approach. Computational methods with without dispersion corrections were used explore the structural electronic features these PAHs possible formation twistomers that might complicate reaction mixtures. Syntheses unsubstituted disubstituted members...
Catechol (1,2-benzenediol), a common phenolic species emitted during biomass burning, is both redox active and metal chelating. When oxidized by OH radicals in the aqueous phase, it rapidly forms brown carbon (BrC). Here, we report chamber studies of multiphase chemistry catechol using HOOH as an radical source, soluble iron, simulated sunlight, either deliquesced or solid-phase seed particles. BrC remarkable similarity (MAC365 = 1.7 ±0.2 m2 g–1, "medium-BrC" category) was produced whenever...
Manipulating the excited-state evolution in host–guest complexes is of importance developing new applications for organic molecular materials. In particular, efficient production triplet-excited states compounds upon light photoexcitation interest because its wide range applications. article number 2001592, Joseph T. Hupp, J. Fraser Stoddart, and co-workers report nanocomposites that combine both porosity photosensitizing properties detoxification Sulfur Mustard simulant.