A5007703101- Conducting polymers and applications
- Perovskite Materials and Applications
- Organic Electronics and Photovoltaics
- Transition Metal Oxide Nanomaterials
- Nanoplatforms for cancer theranostics
- Photodynamic Therapy Research Studies
- Luminescence and Fluorescent Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organic Light-Emitting Diodes Research
- Quantum Dots Synthesis And Properties
- Catalysis for Biomass Conversion
- Biofuel production and bioconversion
- Chalcogenide Semiconductor Thin Films
- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Crystallography and molecular interactions
- Microbial Metabolic Engineering and Bioproduction
- Organometallic Complex Synthesis and Catalysis
- Catalysis and Oxidation Reactions
- Radical Photochemical Reactions
- Porphyrin and Phthalocyanine Chemistry
- Catalytic Processes in Materials Science
- Photopolymerization techniques and applications
- Layered Double Hydroxides Synthesis and Applications
Middle East Technical University
2016-2025
PRG S&Tech (South Korea)
2025
University of California, Berkeley
2014-2017
Energy Biosciences Institute
2015-2017
University of California, Davis
2009-2013
University of Massachusetts Amherst
2006
Polymer electrochromism has been considered one of the liveliest branches conducting polymer research, a tradition continued in last decade. We have witnessed numerous significant advances, making commercial applications closer than ever. This feature article highlights these advances by separating them into 3 sections. The material design section emphasizes new molecular structures that utilized as electrochromic materials and their promising results. color control polymeric electrochromics...
This report highlights the synthesis of only second green polymer in literature, which possesses superior properties over first: a highly transmissive light blue color oxidized state with high optical contrast and excellent switching properties.
Novel donor–acceptor-type polymers, PTBPEQ and PDPEQ, are synthesized shown to be neutral-state green polymeric materials with excellent transmissive oxidized states. Exceptional long-term stability even after 5000 cycles, ease of electrochemical synthesis, extremely fast switching times make these polymers paramount choices for the component polymer electrochromic display applications. Supporting information this article is available on WWW under...
A new donor−acceptor type polymer poly(4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2-dodecyl-2H-benzo [1,2,3] triazole) (PBEBT) was synthesized and its electrochromic properties were investigated. Spectroelectrochemistry studies for PBEBT showed an absorption maximum at 618 nm which is nearly identical to that of poly(ethylenedioxythiophene) (PEDOT) where has a saturated blue color in neutral state. However, film revealed better than PEDOT terms optical contrast, switching time...
To construct a sensing interface, in the present work, conjugated polymer and core-shell magnetic nanoparticle containing biosensor was constructed for pesticide analysis. The monomer 4,7-di(furan-2-yl)benzo[c][1,2,5]thiadiazole (FBThF) nanoparticles were designed synthesized fabrication of biosensing device. first treated with silica then modified using carboxyl groups, which enabled binding biomolecules covalently. For construction proposed sensor two-step procedure performed. First,...
Condensation reactions such as Guerbet and aldol are important since they allow for C–C bond formation give higher molecular weight oxygenates. An initial study identified Pd-supported on hydrotalcite an active catalyst the transformation, although this showed extensive undesirable decarbonylation. A containing Pd Cu in a 3:1 ratio dramatically decreased decarbonylation, while preserving high catalytic rates seen with Pd-based catalysts. combination of XRD, EXAFS, TEM, CO chemisorption TPD...
Significance The development of renewable liquid fuels and bioproducts is critical to reducing global reliance on petroleum mitigating climate change, particularly for applications where few low-carbon alternatives exist. We combine chemical catalysis with life-cycle greenhouse gas (GHG) modeling create a new platform producing biobased aviation fuel automotive lubricant base oils. recyclable catalysts we developed are capable converting sugar biomass-derived alkyl methyl ketones into cyclic...
Abstract Surface passivation with 2D perovskites is a powerful strategy to achieve improved stability and performance in perovskite solar cells (PSCs). Various large organic cations have been successfully implemented, led by phenylethylammonium ( PEA + ) its derivatives. However, systematic studies on sets of understand the effect substituent position device are lacking. Herein, collection halogenated iodide salts x ‐XPEAI where : ortho o ), meta m , para p X F, Cl, Br) synthesized facile...
Two new highly stable electrochromic polymers, poly(5,8-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2,3-di(thiophen-2-yl)quinoxaline) (PDETQ) and poly(5,8-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)quinoxaline) (PDEQ) were synthesized, their potential use as neutral state green polymeric materials was investigated. Spectroelectrochemistry showed that both polymers reveal two distinct absorption bands expected for this type of donor–acceptor polymer, at 410 660 nm PDEQ 405 780 PDETQ. The...
Abstract Realization of commercial RGB‐based polymer electrochromic‐device applications can only be achieved by processable materials that possess three complementary colors in the reduced state and are transparent oxidized state. This report highlights synthesis first green with a transmissive The revealed superior optical contrast visible region fast switching times robust stability. Hence, this material is outstanding candidate for completion RGB color space through polymeric electrochromics.
A polymer switching between all RGB colors, black and transmissive states was synthesized. The (PTBT) is soluble, processable, both p- n-dopable, fluorescent its properties in entire spectrum offer potential uses NIR devices, LEDs solar cells. PTBT possesses almost a single for optoelectronic applications.
The choice of interfacial materials and their properties play a critical role in determining solar cell performance stability. For compatibility with roll-to-roll printing, it is desirable to develop stable cathode interface layers (CILs) that can be processed over the photoactive layer using orthogonal solvents. In this study, an
A visible light sensitive photoinitiator system for the cationic polymerization of typical monomers, e.g. oxiranes such as cyclohexene oxide, vinyl ethers n-butyl ether, and other monomers N-vinylcarbazole, using highly conjugated thiophene derivatives is described. The these was initiated at room temperature upon irradiation in region (λinc = 480 nm) CH2Cl2 solutions with 4,7-di(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)benzo[1,2,5]thiadiazole (DTDT) or...
Abstract Biological and chemocatalytic processes are tailored in order to maximize the production of sustainable biodiesel from lignocellulosic sugar. Thus, combination hydrotalcite‐supported copper(II) palladium(0) catalysts with a modification fermentation acetone–butanol–ethanol isopropanol–butanol–ethanol predictably produces higher concentrations diesel‐range components alkylation reaction.
Abstract Observation of thermally activated delayed fluorescence (TADF) in conjugated systems redefined the molecular design approach to realize highly efficient organic light emitting diodes (OLEDs) early 2010s. Enabling effective reverse intersystem crossing (RISC) by minimizing difference between singlet and triplet excited state energies (Δ E ST ) is proven be a widely applicable fruitful approach, which results remarkable external quantum efficiencies (EQE). The efficacy RISC these...
The lack of long-term stability and reproducibility perovskite solar cells (PSCs) is the main roadblock preventing their successful commercialization. 3D/2D PSCs are one most prominent ways to address these issues. Various salts that mostly based on phenyl ethyl ammonium iodide (PEAI) have been utilized grow a 2D layer 3D perovskites. Herein, we report effect substituting methoxy (-OMe) group at ortho (o), meta (m), para (p) positions PEAI salts. Photoluminescence time-resolved...
Abstract This article reports the use of a quinoxaline derivative as photosensitizer for diaryliodonium salt photoinitiators. 2,3‐bis(3,4‐bis(decyloxy)phenyl)‐5,8‐bis(2,3‐dihydrothieno[3,4‐b][1,4]dioxin‐5‐yl)quinoxaline (DOPEQ), is highly conjugated compound with strong absorption bands at wavelengths ranging from 300 to 550 nm and shown facilitate photoinitiated cationic polymerization heterocyclic monomers such oxiranes oxetanes. The polymerizations are initiated room temperature by using...
Color-changing energy storage devices that can easily communicate with the user carry potential to be integrated into smart electronics. In this work, nanocomposite electrochromic supercapacitor electrodes were fabricated silver nanowire (Ag NW) network and a green transmissive polymer, PDOPEQ. High transparency conductivity of Ag NW current collectors allowed fabrication supercapacitors investigation spectroelectrochemical electrochemical properties Previously reported such as long term...
Abstract Two red‐absorbing, water‐soluble and mitochondria (MT)‐targeting selenophene‐substituted BODIPY‐based photosensitizers (PSs) were realized ( BOD − Se , I ), their potential as photodynamic therapy (PDT) agents evaluated. showed higher 1 O 2 generation yield thanks to the enhanced heavy‐atom effect, this derivative was further tested in detail cell culture studies under both normoxic hypoxic conditions. not only effectively functioned conditions, but also highly selective...
Abstract Wide‐bandgap perovskite solar cells (WBG‐PSCs), when partnered with Si bottom in tandem configuration, can provide efficiencies up to 44%; yet, the development of stable, efficient, and scalable WBG‐PSCs is required. Here, utility hybrid evaporation‐solution method (HESM) investigated meet these demanding requirements via its unique advantages including ease control reproducibility. A PbI 2 /CsBr layer co‐evaporated followed by coating organic‐halide solutions a green solvent....
One of the leading approaches to enhancing performance and stability perovskite solar cells (PSCs) involves passivating surface grain boundaries with large ammonium salts. Here, we report synthesis furan-, thiophene-, selenophene-functionalized phenyl methanaminium iodide salts (FPMAI, TPMAI, SPMAI) their application as agents on 3D [(Cs0.04FA0.85MA0.11)Pb(I0.96Br0.01Cl0.03)3] perovskite. The TPMAI-passivated PSCs performed best achieved a power conversion efficiency (PCE) 23.15% compared...
Oxatriquinanes are tricyclic oxonium ions which known to possess remarkable solvolytic stability compared simple alkyl salts. Their rigid, hemispherical structure presents an oxygen at the apex of three fused five-membered rings. While trivalent species like these have been well described in literature, ability enter into a fourth covalent bonding relationship has visited theory and suggested by outcome certain reactions conducted superacidic media, but never established characterization...