A5056285098- Covalent Organic Framework Applications
- Luminescence and Fluorescent Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Photosynthetic Processes and Mechanisms
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Porphyrin and Phthalocyanine Chemistry
- Lanthanide and Transition Metal Complexes
- Photoreceptor and optogenetics research
- Chromium effects and bioremediation
- Magnetism in coordination complexes
- Antibiotic Resistance in Bacteria
- Spectroscopy and Quantum Chemical Studies
- Pharmaceutical and Antibiotic Environmental Impacts
- Photochemistry and Electron Transfer Studies
- Tuberculosis Research and Epidemiology
- Solid-state spectroscopy and crystallography
- Nanoplatforms for cancer theranostics
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Microbial Community Ecology and Physiology
- Antibiotics Pharmacokinetics and Efficacy
Northwestern University
2018-2024
Argonne National Laboratory
2022-2024
Middlebury College
2016-2017
Significant interest exists in lead trihalides that present the perovskite structure owing to their demonstrated potential photovoltaic, lasing, and display applications. These materials are also notable for unusual phase behavior often displaying easily accessible transitions. In this work, time-resolved X-ray diffraction, performed on cesium bromide nanocrystals, maps lattice response controlled excitation fluence. nanocrystals undergo a reversible, photoinduced orthorhombic-to-cubic...
Large singlet exciton diffusion lengths are a hallmark of high performance in organic-based devices such as photovoltaics, chemical sensors, and photodetectors. In this study, dynamics two-dimensional covalent organic framework, 2D COF-5, is investigated using ultrafast spectroscopic techniques. After photoexcitation, the COF-5 decays via three pathways: (1) excimer formation (4 ± 2 ps), (2) relaxation (160 40 (3) decay (>3 ns). Excitation fluence-dependent transient absorption studies...
Abstract Antibiotic resistance has emerged as a major threat to global health care. This is largely due the fact that many pathogens have developed strategies acquire antibiotics. Metallo‐β‐lactamases (MBL) evolved inactivate most of commonly used β‐lactam AIM‐1 one only few MBLs from B3 subgroup encoded on mobile genetic element in human pathogen. Here, its mechanism action was characterised with combination spectroscopic and kinetic techniques compared other MBLs. Unlike it appears two...
Microorganisms in the permafrost contain a potent mechanism to inactivate antibiotics.
ConspectusEnergy transport within organic solids typically takes place via the movement of localized excitation or excitons, i.e., tightly bound electron–hole pairs. Exciton diffusion dynamics are crucial to applications like solar fuels production through photocatalysis and optoelectronics. Covalent frameworks (COFs) metal–organic (MOFs) classes framework that integrate ordered assemblies chromophores. These materials possess properties desirable for aforementioned applications. Their...
Excitonic dynamics studies of a 2D COF, its corresponding hexagonal macrocycle, and extended nanotubes comprised stacked macrocycles reveal that layering the macrocycle in assembled COF nanotube lead to prolonged exciton lifetime.
Recent studies have shown that molecular aggregation structures in precursor solutions of organic photovoltaic (OPV) polymers substantial influence on polymer film morphology, exciton and charge carrier transport dynamics, hence, the resultant device performance. To distinguish photophysical impacts due to increasing π-conjugation from chain lengthening π–π stacking single/multi solution film, we used oligomers a well-studied transfer PTB7 with different lengths as models reveal intrinsic...
Copper(I) bis-diimine complexes have played important roles in light-activated processes that can lead to their potential applications photocatalysis and chemical sensing. Their metal-to-ligand charge-transfer (MLCT) excited-state properties are tunable by various structural factors. Dimeric Cu(I) with connecting diimine derivative ligands offer another tuning platform for the properties. Here, we investigate two covalently connected dimeric Cu(I)'s varying constraints exerted number of...
Ordered organic materials and assemblies have great potential to be tailored desirable properties for optoelectronic applications, such as long exciton lifetime high directional mobility. Framework materials, twodimensional covalent frameworks (2D COFs), well their truncated macrocyclic analogues, are versatile platforms organize functional aromatic systems into designed robust materials. Here we investigate the dynamics in a 2D COF, its corresponding hexagonal macrocycle, extended nanotubes...
<p>Large singlet exciton diffusion lengths are a hallmark of high performance in organic based devices such as photovoltaics, chemical sensors, and photodetectors. In this study, dynamics two-dimensional covalent framework, COF- 5, is investigated using ultrafast spectroscopic techniques. Following photoexcitation, the COF-5 decays via three pathways: 1) excimer formation (4 ± 2 ps), 2) relaxation (160 40 3) decay (>3 ns). Excitation fluence-dependent transient absorption studies...
Ordered organic materials and assemblies have great potential to be tailored desirable properties for optoelectronic applications, such as long exciton lifetime high directional mobility. Framework materials, twodimensional covalent frameworks (2D COFs), well their truncated macrocyclic analogues, are versatile platforms organize functional aromatic systems into designed robust materials. Here we investigate the dynamics in a 2D COF, its corresponding hexagonal macrocycle, extended nanotubes...