A very high hole mobility of 15 cm2 V-1 s-1 along with negligible hysteresis are demonstrated in transistors an organic-inorganic perovskite semiconductor. This results from the well-developed crystallites, improved conversion to perovskite, reduced trap density, and injection by employing a top-contact/top-gate structure surface treatment MoOx hole-injection layers.

Abstract In this study, we investigate the lasing properties of 4,4′-bis[( N -carbazole)styryl]biphenyl thin films under electrical pumping. The electroluminescent devices incorporate a mixed-order distributed feedback SiO 2 grating into an organic light-emitting diode structure and emit blue lasing. results provide indication by direct injection current film through selection high-gain semiconductor showing clear separation wavelength from significant triplet polaron absorption design...

The demonstration of continuous-wave lasing from organic semiconductor films is highly desirable for practical applications in the areas spectroscopy, data communication, and sensing, but it still remains a challenging objective. We report low-threshold surface-emitting distributed feedback lasers operating quasi-continuous-wave regime at 80 MHz as well under long-pulse photoexcitation 30 ms. This outstanding performance was achieved using an thin film with high optical gain,...

Device stability of planar perovskite solar cells is improved by virtue multifunctional BQ additive. The morphology and crystal quality the films are because slows rate formation. Electron transfer from to reduces charge-recombination losses, oxidizing ability effectively suppresses formation metallic lead improves device lifetime.

Four-membered heterocycles are highly sought after in modern drug discovery as they provide beneficial properties to the target molecules. Despite tremendous efforts by synthetic research community, there is a need for simple and new method incorporate these motifs into design Herein, we reveal cycloisomerization strategy construction of oxetane azetidine rings via metal hydride hydrogen atom transfer/radical polar crossover, which challenging both enthalpically entropically. This suitable...

ABSTRACT Organic lasers hold great promise for enabling a new class of future optoelectronics. Consequently, the development organic semiconductors as gain media has recently been subject significant interest. The molecular design principle based on Einstein coefficients validated achieving high gain, with para ‐phenylene‐vinylene scaffolds recognized one most crucial frameworks. In this study, we develop stilbene tetramer derivative, QSBCz, which significantly increased conjugation compared...

Large electron injection barriers and electrode degradation are serious issues that need to be overcome obtain n-channel operation in field-effect transistors with an organic-inorganic layered perovskite (C6H5C2H4NH3)2SnI4 semiconductor. By employing low-work-function Al source/drain electrodes by inserting C60 layers between the semiconductor reduce barrier suppress degradation, we demonstrate mobilities of up 2.1 cm2/V s, highest value ever reported spin-coated transistors. The transport...

Complementary organic logic circuits and lateral bipolar microstructures with specified p- n-region profiles can be patterned by direct laser writing in solution- processed thin films faricated from a quinoidal oligothiophene derivative. To demonstrate the versatility of this method, fabrication NAND NOR gates as well gate-modulated p-n diode is reported (see figure). Detailed facts importance to specialist readers are published "Supporting Information". Such documents peer-reviewed, but not...

Cyclometalated platinum(<sc>ii</sc>) complexes with α-aminocarboxylato ligands [Pt^II(ppy)L] (ppy = 2-phenylpyridinato, L⁻ Gly, Ala, Leu, Ile, Phe, Sar) in the solid state exhibited reversible luminescent mechanochromism.

The true performance of field-effect transistors with spin-coated organic–inorganic perovskite (C6H5C2H4NH3)2SnI4 semiconductor layers remains unknown because the presence contact resistance (RC). To evaluate intrinsic carrier mobility (μ), we fabricated large channel lengths (L). μ gradually increased increasing L and then became constant in large-L region, reduced contribution RC relative to total resistance. values estimated from this region reached 26 4.8 cm2 V−1 s−1 for holes electrons,...

Abstract Cyanobacteria inhabit areas with a broad range of light, temperature and nutrient conditions. The robustness cyanobacterial cells, which can survive under different conditions, may depend on the resilience photosynthetic activity. Cyanothece sp. PCC 8801 (Cyanothece), freshwater cyanobacterium isolated from Taiwanese rice field, had higher repair activity photodamaged photosystem II (PSII) intense light than Synechocystis 6803 (Synechocystis), another cyanobacterium. contains...

A novel luminescent clamshell-like platinum(II) complex with rac-tartrate, rac-[{PtII(4Me2bpy)}2(μ-tart)] (Pt2; 4Me2bpy: 4,4′-dimethyl-2,2′-bipyridine; tartH22–: tartrate), was synthesized, and its vapo-, thermo-, solvatochromic behavior studied. The isolated in four crystal forms, namely, Pt2·4H2O (color under ambient light: yellow, λem = 573 nm, intramolecular Pt···Pt separation: 3.55 Å), Pt2·4MeOH (red, 650 3.33 anhydrate Pt2 no luminescence, 3.70 Pt2·2H2O (orange, 595 3.60 Å). Vapo-...

Dinuclear niobium complexes [{NbCl2L}2(μ-Cl)2(μ-L)] (L = tetrahydrothiophene C4H8S, THT (1a)) have been prepared by the reaction of diniobium(V) decachloride (Nb2Cl10) with magnesium in THT. The structure 1a was determined X-ray crystallography to a Nb−Nb bond, which is consistent that 1b dimethyl sulfide, Me2S). 1a, as well 1b, alkyne (R1C⋮CR2) at room temperature gave head-to-tail cycloadded trimer, 1,3,5-(R1)3-2,4,6-(R2)3-benzene (R1 H, R2 Ph (2); R1 p-tolyl, H (3); CH2Cl (4); COOEt (5);...

Fluorescence resonance energy transfer (FRET) is investigated with manganese-doped ZnSe nanoparticles (quantum dots) as long fluorescence lifetime donors and spiropyran molecules acceptors. The kinetics of photochemical ring-opening reaction upon UV-illumination exploited to achieve efficient quenching the manganese lifetimes at a low temperature 78 K in methylcyclohexane/isopentane mixture. Modulation acceptor structure from closed open form allows us investigate temporal decrease donor...

A xanthene derivative containing a borinate moiety emitted red fluorescence with high quantum yield. The interaction between the and sugar molecule induced change based on in HOMO-LUMO gap. response was pH-resistant wide range. In addition, catechol quenched through photoinduced electron transfer. polyol binding ability of dyes will pave way for new biological applications chemical sensors.

Synthesis, isomerization, and photophysical properties of novel cis-N,N-cyclometalated complexes [Pt(C∧N)(l-Phe)] (C∧N = benzoquinolinate (1), phenylpyridinate (2), 2-(p-tolyl)pyridinate (3), 1-phenylpyrazolate (4); l-Phe- l-phenylalaninate) are reported herein. In solution, the cis forms isomerize to their trans via an associative mechanism. This cis/trans isomerism barely influences absorption luminescence in except for a characteristic at approximately 340 nm spectra that is not observed...

The substitution of dimethylacetamide (dma) for the terminal aqua ligands in carboxylate-bridged trinuclear chromium(III) complex [Cr(3)(&mgr;(3)-O)(&mgr;-RCO(2))(6)(H(2)O)(3)](+) (R = H, CH(3), CH(3)CH(2), CH(2)Cl, CHCl(2), CH(3)OCH(2), (CH(3))(3)C, CH(2)ClCH(2), (CH(3)CH(2))(2)CH) dma was kinetically studied by UV-visible absorption at 25-50 degrees C and 0.1-232 MPa. time course is uniphasic over all three steps ligand replacement. rate k varied from 2.4(1) x 10(-)(5) CHCl(2)) to 9.49(2)...

Aerobic exercise can promote "fast-to-slow transition" in skeletal muscles, i.e. an increase oxidative fibers, mitochondria, and myoglobin improvement glucose lipid metabolism. Here, we found that mice administered Mitochondria Activation Factor (MAF) combined with training could run longer distances for a time compared the only group; MAF is high-molecular-weight polyphenol purified from black tea. Furthermore, intake increased phosphorylation of AMPK mRNA level transporter 4 (GLUT4). Thus,...

Substituent effects of the electron-donating ability and bulkiness R in [{Ni(acac)}₂(μ-RAp)] (RApH₂: azophenines) on properties catalytic activity are reported.

Although oxygen, nitrogen, and carbon have been extensively studied as nucleophilic elements in the halocyclization of alkenes, sulfur-based nucleophiles are relatively unexplored. Herein, we investigated bromocyclization chemistry involving unsaturated thioesters, with a focus on their use potential S-nucleophiles. We developed method that uses alkenoic thioesters N-bromoacetamide (NBA) to form cyclic bromosulfides. The resulting 5-exo products labile can be used various substitution reactions.

High-molecular-weight polyphenols from oolong and black teas increased mitochondrial membrane potential, as measured by a method using ciliated protozoan Tetrahymena rhodamine 123. These polyphenols, referred to activation factors (MAFs), were purified solvent extraction Toyopearl column chromatography. The number-average molecular weights of the MAFs 9,000 18,000, weight-average 15,000 25,000. potential more than catechins did. Treatment with tannase indicated that they contained galloyl...

Resorcin[4]arene cavitand 1 with 1,3,2-benzodiazaborolyl walls was newly synthesized. It showed a large blue shift in the fluorescence spectra upon selective complexation alkyltrimethylammonium salts CH2Cl2–DMSO (9 : v/v); this detectable naked eye.

2,5-Bis(4-propyl-2-pyrrolyl)thiophene was reacted with aryl aldehydes to afford large porphyrinoids; [24]dithiaamethyrin(1.0.0.1.0.0) and [36]trithianonaphyrin(1.0.0.1.0.0.1.0.0). X-ray crystallography of the dithiaamethyrin revealed a highly planar ring structure mean plane deviation (MPD) value 0.053 Å. A positive NICS(0) (+13.9 ppm) calculated for this 24π system unambiguously indicates an antiaromatic character that is consistent remarkably low field (1) H chemical shift inner NH proton...