A5025682868- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Porphyrin and Phthalocyanine Chemistry
- Magnetism in coordination complexes
- Photochemistry and Electron Transfer Studies
- Luminescence and Fluorescent Materials
- Molecular Junctions and Nanostructures
- Hemoglobin structure and function
- Photosynthetic Processes and Mechanisms
- Metal complexes synthesis and properties
- Pediatric health and respiratory diseases
- Quantum Dots Synthesis And Properties
- Advanced Fluorescence Microscopy Techniques
- Porphyrin Metabolism and Disorders
- Gold and Silver Nanoparticles Synthesis and Applications
- Inorganic Fluorides and Related Compounds
- Advanced NMR Techniques and Applications
- Photoreceptor and optogenetics research
- Respiratory and Cough-Related Research
- Photochromic and Fluorescence Chemistry
- Click Chemistry and Applications
- Liquid Crystal Research Advancements
- Nanocluster Synthesis and Applications
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
University of Miami
2015-2021
University of Florida
2008-2017
Gainesville Obstetrics & Gynecology
2016-2017
American Orchid Society
2017
A coumarin fluorophore and an oxazine photochrome can be integrated within the same molecular skeleton connected covalently to a secondary antibody. Illumination of antibody–dyad conjugate at appropriate activation wavelength opens ring reversibly shifts bathochromically ground-state absorption component. Selective excitation photochemical product then produces significant fluorescence allows detection activated bioconjugates single-molecule level. Such events exploited resolve temporally...
We report the synthesis, structure and properties of cyanide-bridged dinuclear complex ions [Ru(L)(bpy)(μ-NC)M(CN)5]2−/− (L = tpy, 2,2′;6′,2′′-terpyridine, or tpm, tris(1-pyrazolyl)methane, bpy 2,2′-bipyridine, M Fe(II), Fe(III), Cr(III)) related monomers [Ru(L)(bpy)X]2+ (X CN− NCS−). All monomeric compounds are weak MLCT emitters (λ 650–715 nm, ϕ ≈ 10−4). In Fe(II) Cr(III) systems, cyanide bridge promotes efficient energy transfer between Ru-centered state a Fe(II)- Cr(III)-centered d–d...
We report that supramolecular polymer films composed of a 2:1 mixture monodiamidopyridine diketopyrrolopyrrole (DPP) electron donors and perylene bisdiimide (PDI) acceptors undergo photoinduced charge transfer in the solid state. Film formation is guided by complementary noncovalent interactions programmed into molecular components, resulting film architecture comprised wires with order across molecular-to-macroscopic continuum. Using ultrafast transient absorption spectroscopy, we show...
The anharmonic vibrational frequencies of FHF(-) were computed by the self-consistent-field, configuration-interaction, and second-order perturbation methods with a multiresolution composite potential energy surface generated electronic coupled-cluster method various basis sets. Anharmonic averaging was performed for bond length nuclear magnetic resonance indirect spin-spin coupling constants, where latter equation-of-motion method. calculations placed at 580 (nu(1)), 1292 (nu(2)), 1313...
Multi-metallic complexes based on {Ru–Cr}, {Ru–Ru} and {Ru–Ru–Cr} fragments are investigated for their light-harvesting long-range energy transfer properties.
A series of cyanide-bridged bimetallic compounds the general formula [Ru(L)(bpy)(μ-NC)(M)]2−/−/2+ (L = tpy, 2,2′-6′,2′′-terpyridine, or tpm, tris(1-pyrazolyl)methane, bpy 2,2′-bipyridine, M RuII(CN)5, OsIII(CN)5, OsII(CN)5, RuII(py)4(CN), py pyridine) have been synthesized and fully characterized. Most them present MLCT emission (λ 690–730 nm, Φ 10−3–10−4) their photophysical properties resemble ones respective mononuclear Ru(L)(bpy) species. The exception is when where an intramolecular...
The picosecond excited state dynamics of [Ru(tpm)(bpy)(NCS)]<sup>+</sup> (<bold>RubNCS+</bold>) and [Ru(tpm)(bpy)(CN)]<sup>+</sup> (<bold>RubCN+</bold>) (tpm = tris(1-pyrazolyl)methane, bpy 2,2′-bipyridine) reveal an intermediate MLCT living in the 300 ps timescale.
Gold nanoclusters (AuNCs) are a recently developed class of photoluminescent nanomaterial with potential for detection and imaging applications in both chemistry biology. The AuNC small size (Au104NC) combination their long-lived, near-infrared (NIR) emission suggests that they could be applied as biological label directly also acceptor energy transfer-based biosensing. Previous studies have shown functionalized AuNCs can act energy-transfer acceptors; however, the underlying mechanism...
A hexylalkoxy dipolar D-A-A molecule [7-(4-N,N-(bis(4-hexyloxyphenyl)amino)phenyl)-2,1,3-(benzothia-diazol-4-yl)methylene]propane-dinitrile, (C6-TPA-BT-CN) has been synthesized and the photophysics studied via femtosecond transient absorption spectroscopy (FsTA) in toluene amorphous liquid crystalline spherulite thin films. Two macromolecular phases (banded, non-banded) were observed through concentration dependent, solution processing techniques are birefringent with a negative sign of...
Redox active cofactors play a dynamic role inside protein binding sites because the amino acids responsible for participate in electron transfer (ET) reactions. Here, we use femtosecond transient absorption (FsTA) spectroscopy to examine ultrafast ET between quinacrine (Qc), an antimalarial drug with potential anticancer activity, and riboflavin (RfBP) known Kd = 264 nM. Steady-state reveals ∼ 10 nm red-shift ground state when QcH32+ is titrated RfBP, Stern-Volmer analysis shows ∼84%...