A5004264172- Spectroscopy and Quantum Chemical Studies
- Photosynthetic Processes and Mechanisms
- Photoreceptor and optogenetics research
- Spectroscopy and Laser Applications
- Photochemistry and Electron Transfer Studies
- Molecular spectroscopy and chirality
- Advanced Chemical Physics Studies
- Petroleum Processing and Analysis
- Spectroscopy Techniques in Biomedical and Chemical Research
- Marine and coastal ecosystems
- GABA and Rice Research
- Algal biology and biofuel production
- Water Quality Monitoring and Analysis
- Medicinal Plants and Neuroprotection
- Supramolecular Self-Assembly in Materials
- Laser Design and Applications
- Plant Gene Expression Analysis
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
Ospedale San Pietro Fatebenefratelli
2023-2024
University of Padua
2013-2020
2D electronic spectroscopy is a widely exploited tool to study excited state dynamics. A high density of information enclosed in spectra. crucial challenge objectively disentangle all the features third order optical signal. We propose global analysis method based on variable projection algorithm, which able reproduce simultaneously coherence and population dynamics rephasing non-rephasing contributions. Test measures at room temperature standard dye are used validate procedure discuss...
Abstract The subtle details of the mechanism energy flow from carotenoids to chlorophylls in biological light-harvesting complexes are still not fully understood, especially ultrafast regime. Here we focus on antenna complex peridinin–chlorophyll a –protein (PCP), known for its remarkable efficiency excitation transfer carotenoids—peridinins—to chlorophylls. PCP solutions studied by means 2D electronic spectroscopy different experimental conditions. Together with global kinetic analysis and...
Two-dimensional electronic spectroscopy based on passive phase stabilization methods is now well known and widely employed worldwide.In the most recent fully non-collinear implementations, a great stability often achieved at expense of independent control over pulse timings, limiting full potential technique.Here we propose several modifications in experiment geometry, calibration procedures, data acquisition processing routines.The setup easily tunable to record different phase-matching...
The non-radiative relaxation of the excitation energy from higher states to lowest state in chlorophylls is a crucial preliminary step for process photosynthesis. Despite continuous theoretical and experimental efforts clarify ultrafast dynamics this process, it still represents object an intense investigation because timescale congestion involved makes its characterization particularly challenging. Here we exploit 2D electronic spectroscopy recently developed data analysis tools provide...
In this work, we demonstrate the use of two-dimensional electronic spectroscopy (2DES) to study mechanism and time scale femtosecond Stokes shift dynamics in molecules characterized by intramolecular charge transfer, such as distyryl-functionalized boron dipyrromethene (BODIPY) molecules. The obtained results that 2DES allows clear direct visualization phenomenon. analysis 2D data terms frequency-frequency decay associated maps provides indeed not only relaxation process but also starting...
Abstract The Water-Soluble Chlorophyll Protein (WSCP) of Brassicaceae is a remarkably stable tetrapyrrole-binding protein that, by virtue its simple design, an exceptional model to investigate the interactions taking place between pigments and their scaffold how they affect photophysical properties functionality complexes. We investigated variants WSCP from Lepidium virginicum (Lv) Brassica oleracea (Bo), reconstituted with (Chl) b , determine mechanisms which different Chl binding sites...
The interplay between active molecules and the protein environment in light-harvesting complexes tunes photophysics dynamical properties of pigment–protein a subtle way, which is not fully understood. Here we characterized ultrafast dynamics four variants water-soluble chlorophyll (WSCP) as an ideal model system to study behavior strongly interacting chlorophylls. We found that when coordinated by WSCP protein, presence formyl group b replacing methyl affects exciton energy system, opening...
The biological light-harvesting process offers an unlimited source of inspiration. high level control, adaptation capability, and efficiency challenge humankind to create artificial biomimicking nanoarchitectures with the same performances respond our energy needs. Here, in extensive search for design principles at base efficient light harvesters, approach based on self-assembly pigment-peptide conjugates is proposed. solvent-driven controlled aggregation peptide moieties promotes formation...
The optical and transport properties of biological artificial multichromophoric functional materials are strongly affected by the disorder electron–vibration couplings. conformational in multichromophores becomes critical especially control coherent dynamics. Indeed, microscopic details dephasing processes promoted not yet fully clarified. Here we applied 2D electronic spectroscopy to study dynamics vibrational coherences porphyrin-functionalized polymer samples characterized different...
The Natural Gas (NG) sector is looking at the Hydrogen-enriched mixtures (H-NG) with growing interest. Hydrogen injections in NG networks are expected to increase next years. Simultaneously, there requirement constantly sample composition and thermodynamics properties of combustible blends. Raman spectroscopy an intrinsic non-invasive approach for gas analysis. In addition, this technique able provide multiple-species analysis a simultaneous way. An industrial-grade instrument, designed...
The combustible gas sector requires for instrumentation capable to determine the composition and quality of mixtures present in transport distribution networks. parameters need be monitored a wide interval, since are found within an extremely variable range. A compact, fast highly sensitive instrument based on Raman spectroscopy has been developed with specific aim operate directly on-line. This approach is intrinsically non-invasive, it needs laser beam passing through gas, multi-species...
Bacteriochlorophyll is the primary pigment in light-harvesting pigment-protein complexes (PPCs) of bacterial photosynthetic apparatus. 2D electronic spectroscopy (2DES) represents one most exploited and powerful techniques to characterize ultrafast relaxation dynamics PPCs, particular, assess presence coherent mechanisms during energy transport. The data reported this work associated research article, "Characterization bacteriochlorophyll a solution" [Meneghin et al., 2019] are an important...