A5021691241- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Perovskite Materials and Applications
- 2D Materials and Applications
- Luminescence and Fluorescent Materials
- Organic Light-Emitting Diodes Research
- Quantum Dots Synthesis And Properties
- Solid-state spectroscopy and crystallography
- Luminescence Properties of Advanced Materials
- Organic and Molecular Conductors Research
- Radiation Detection and Scintillator Technologies
- Peptidase Inhibition and Analysis
- Protease and Inhibitor Mechanisms
- Mesoporous Materials and Catalysis
- Aerogels and thermal insulation
- Nanocluster Synthesis and Applications
- Analytical chemistry methods development
- Cell Adhesion Molecules Research
- Metal complexes synthesis and properties
- Pigment Synthesis and Properties
- Atomic and Subatomic Physics Research
- Polymer Surface Interaction Studies
- Optical properties and cooling technologies in crystalline materials
- Adsorption and biosorption for pollutant removal
- Advanced Photocatalysis Techniques
Florida State University
2018-2023
American University of Beirut
2019-2020
Tallahassee Orthopedic Clinic
2019
Scintillators are utilized for X-ray detection in many important fields ranging from homeland security to health care. Developing low-cost, high-performance scintillation materials address the issues of existing commercially available ones is great interest. Recently, organic metal halide hybrids have emerged as highly promising luminescent with excellent optical properties and low-temperature solution processability. Herein, we report a zero-dimensional hybrid, (PPN)2SbCl5 (PPN =...
The photophysical tuning is reported for a series of tetraphenylphosphonium (TPP) metal halide hybrids containing distinct halides, TPP2 MXn (MXn =SbCl5 , MnCl4 ZnCl4 ZnCl2 Br2 ZnBr4 ), from efficient phosphorescence to ultralong afterglow. afterglow properties TPP+ cations could be suspended the low band gap emissive species, such as SbCl52- and MnCl42- but significantly enhanced wide non-emissive ZnCl42- . Structural studies reveal that attributed stronger π-π stacking intermolecular...
Organic metal halide hybrids with zero-dimensional (0D) structure at the molecular level, or single-crystalline bulk assemblies of halides, are an emerging class light-emitting materials high photoluminescence quantum efficiencies (PLQEs) and color tunability. Here we report synthesis characterization a new assembly clusters, (bmpy)9[ZnCl4]2[Pb3Cl11] (bmpy: 1-butyl-1-methylpyrrolidinium), which exhibits green emission peaked 512 nm remarkable near-unity PLQE room temperature. Detailed...
Organic–inorganic metal halide hybrids have emerged as new generation functional materials with exceptional structure and property tunability for a variety of applications. Besides the most investigated ABX3 perovskites, consisting wide range organic cations anions been developed studied recently. Here, we provide an overview these possessing various crystallographic structures, including double low dimensional hybrids, other perovskite-related materials. We discuss their syntheses,...
Zero-dimensional (0D) organic metal halide hybrids are an emerging class of light emitting materials with exceptional photoluminescence quantum efficiencies (PLQEs), thanks to their perfect "host–guest" structures species periodically "embedded" in a wide band gap cationic matrix through ionic bonds. However, achieving efficient blue emissions is challenging for this materials, as structural distortions halides often lead large Stokes shifts. Here we report highly luminescent 0D bromide,...
Tin halide perovskites and perovskite-related materials have emerged as promising lead-free hybrid for various optoelectronic applications. While remarkable progress has been achieved in the development of organic tin hybrids with diverse structures controlled dimensionalities at molecular level, some controversial results that reported recently need to be addressed. For instance, different photophysical properties two-dimensional (2D) (PEA)2SnBr4 (PEA = phenylethylammonium) by several...
Bulk assemblies of zero-dimensional (0D) metal halides with exceptional structural versatility have enabled the development a number highly efficient emitters tunable photophysical properties. Here, we report novel single crystalline bulk assembly multicomponent 0D halides, (bmpy)9[SbCl5]2[Pb3Cl11] (bmpy = 1-butyl-1-methylpyrrolidinium), which exhibits dual emissions from distinct halide species. Excitation-dependent warm white light high photoluminescence quantum efficiencies >70% can be...
Abstract The family of molecular level low‐dimensional organic metal halide hybrids has expanded significantly over the last few years. Here a new type 1D structure is reported, in which octahedra form corrugated double‐chain via nonplanar edge‐sharing. This material with chemical formula C 5 H 16 N 2 Pb Br 6 exhibits broadband yellow emission under ultraviolet light excitation photoluminescence quantum efficiency around 10%. light‐yellow considered to be attributed self‐trapping excitons....
Abstract Scintillators, one of the essential components in medical imaging and security checking devices, rely heavily on rare‐earth‐containing inorganic materials. Here, a new type organic‐inorganic hybrid scintillators containing earth abundant elements that can be prepared via low‐temperature processes is reported. With room temperature co‐crystallization an aggregation‐induced emission (AIE) organic halide, 4‐(4‐(diphenylamino) phenyl)‐1‐(propyl)‐pyrindin‐1ium bromide (TPA‐PBr), metal...
Metal halide perovskite nanocrystals (NCs) have emerged as new-generation light-emitting materials with narrow emissions and high photoluminescence quantum efficiencies (PLQEs). Various types of NCs, e.g., platelets, wires, cubes, been discovered to exhibit tunable across the whole visible spectrum. Despite remarkable advances in field many nanostructures inorganic NCs not yet realized metal perovskites, producing highly efficient blue-emitting remains challenging great interest. Here, we...
Platinum(<sc>ii</sc>) binuclear complexes with two metal centers facing each other are reviewed based on their molecular structures, photophysical properties, and applications in light emitting sensing devices.
Single crystalline bulk assemblies of metal halide clusters show great potential as highly efficient light emitters with tunable photophysical properties. However, synthetic control the geometry in a rational manner has not been well established, and relationships between properties structures this emerging class zero-dimensional materials are still understood. Here, we report synthesis characterization two lead bromide clusters, (bmpy)6[Pb3Br12] (T1) (bmpy)9[ZnBr4]2[Pb3Br11] (T2) (bmpy:...
Abstract Metal halide perovskite nanocrystals (NCs) have emerged as highly promising light emitting materials for various applications, ranging from light‐emitting diodes (PeLEDs) to lasers and radiation detectors. While remarkable progress has been achieved in efficient stable green, red, infrared NCs, obtaining blue‐emitting NCs remains a great challenge. Here, facile synthetic approach the preparation of blue CsPbBr 3 nanoplatelets (NPLs) with treatment by an organic sulfate is reported,...
Optically pumped white light-emitting diodes (WLEDs), consisting of blue/ultraviolet LED chips and down conversion phosphors, have a wide range applications in our daily life, such as full color display solid-state lighting. While remarkable progress light quality, device efficiency, lifetime has been achieved during the last two decades, many challenges remain optically WLEDs, searching for low cost high performance phosphors is still great interest. Recently, metal halide perovskites...
Abstract Perovskite light‐emitting diodes (PeLEDs) have received great attention for their potential as next‐generation display technology. While remarkable progress has been achieved in green, red, and near‐infrared PeLEDs with external quantum efficiencies (EQEs) exceeding 20%, obtaining high performance blue remains a challenge. Poor charge balance due to large injection barriers identified one of the major roadblocks achieve efficiency. Here band edge control perovskite emitting layers...
Ionically bonded organic metal halide hybrids have emerged as versatile multicomponent material systems exhibiting unique and useful properties. The unlimited combinations of cations halides lead to the tremendous structural diversity this class materials, which could unlock many undiscovered properties both halides. Here we report synthesis characterization a series benzoquinolinium (BZQ) with general formula (BZQ)Pb2X5 (X = Cl, Br), in form two-dimensional (2D) structure. These BZQ are...
Binuclear platinum(II) complexes with strong Pt–Pt interactions are an interesting class of luminescent materials, which photophysical properties could be controlled via multiple ways through organic ligands and distance. While a number binuclear have been developed tunable emissions, achieving high photoluminescence quantum efficiency (PLQE) remains challenging great interest. Here we report the synthesis characterization series 2,4-difluorophenylpyridine bridged by thiazol-2-thiolate...
Abstract The photophysical tuning is reported for a series of tetraphenylphosphonium (TPP) metal halide hybrids containing distinct halides, TPP 2 MX n (MX =SbCl 5 , MnCl 4 ZnCl Br ZnBr ), from efficient phosphorescence to ultralong afterglow. afterglow properties + cations could be suspended the low band gap emissive species, such as SbCl 2− and but significantly enhanced wide non‐emissive . Structural studies reveal that attributed stronger π–π stacking intermolecular electronic coupling...
X-ray scintillators based on organic chromophores have the potential to deliver low-cost radiation detection products with fast response signals. However, their relatively low performance compared that of widely used inorganic in terms attenuation and light output has limited applications. Here we report a dramatically improved scintillation for BODIPY dye, difluoro(4-(1,1-dimethylethyl)-2-{1-[4-1,1-dimethylethyl)-3,5-dimethyl-2H-pyrrol-2-ylidene-N] ethyl-3,5-dimethyl-1H-pyrrol-2-ylidene-N]...
Abstract Mechanochemical synthesis has emerged as a facile method for the preparation of wide range organic, inorganic, and polymeric materials. Here, we report use mechanochemical ionically bonded organic metal halide hybrids with zero‐dimensional (0D) structure at molecular level. (Ph 4 P) 2 SbCl 5 MnCl were synthesized by grinding appropriate ratios salt Ph PCl inorganic salts 3 , respectively. The structural photophysical properties mechanochemically characterized, which are almost...
Highly porous nickel–aluminum oxide aerogels were prepared according to a one-pot sol–gel process and dried under supercritical carbon dioxide conditions. Although the surface properties of these materials very appealing for applications in catalysis, never applied adsorption. The nickel effect on structure has been investigated via broad range structural, textural, morphology characterization before after heat treatment. adsorption capacity as-synthesized calcined azo dyes was assessed...
The photophysical properties of square planar Pt(II) complexes are often strongly dependent on their self‐assembly modes and intermolecular Pt⋯Pt interactions. Controlling these interactions is important to achieve valuable for various applications, such as light‐emitting diodes environmental sensing devices. Herein, a series highly luminescent ionic with tunable emission colors reported, by controlling the molecular structures in solid state. Four complexes, general formula [Pt(C ^ N)(N N)]...
Blue Perovskite LEDs In article number 2201605, Biwu Ma and co-workers develop highly efficient stable blue emitting CsPbBr3 nanoplatelets with surface passivation via a multifunctional organic sulfate, 2,2-(ethylenedioxy) bis(ethylammonium) sulfate. light diodes emission peaks at 462 nm are fabricated exhibit remarkable spectral stability.