In this communication, we report the synthesis of a novel diketopyrrolopyrrole–diketopyrrolopyrrole (DPP–DPP)-based conjugated copolymer and its application in high-mobility organic field-effect transistors. Copolymerization DPP with yields exceptional properties such as extended absorption characteristics (up to ∼1100 nm) electron mobility values >1 cm2 V–1 s–1. The DPP–DPP combination demonstration transistors extremely high makes work an important step toward new family copolymers for...

Charge-storage mechanism of free-standing MoS2/r-GO (r-GO = reduced graphene oxide) hybrid nanoflakes on molybdenum (Mo) foil in Na2SO4 solution is elucidated for realizing a high-performance asymmetric supercapacitor (ASC). Thiourea that acts primarily as sulfur source also helps intercalating ammonium ions, which along with r-GO facilitate situ exfoliation MoS2, producing hierarchical MoS2 expanded interlayer spacing. This expansion facilitates Na+-ions intercalation/deintercalation and...

A novel fluoranthene based fluorescent chemosensor for the detection of picric acid (PA) at parts per billion (ppb) level was evaluated. Static fluorescence quenching dominant process by intercalative π–π interaction between (S1) and nitroaromatics.

Current organic semiconductors for photovoltaics (OPV) have relative dielectric constants (relative permittivities, ε r ) in the range of 2–4. As a consequence, Coulombically bound electron‐hole pairs (excitons) are produced upon absorption light, giving rise to limited power conversion efficiencies. We introduce strategy enhance well‐known donors and acceptors without breaking conjugation, degrading charge carrier mobility or altering transport gap. The ability ethylene glycol (EG)...

A miniemulsion process has been used to create layers of conjugated semiconducting polymers from aqueous suspensions. Layers particles with sizes ranging between 70 and 250 nm can be formed annealing results in coalescing the into large homogeneous domains (see Figure for a photoluminescence image Me-LPPP layer).

A method for the removal of anionic (sulfonated) dyes from aqueous dye solutions using chemical interaction molecules with polyaniline is reported. Polyaniline (PANI) emeraldine salt was synthesized by oxidation. Sulfonated undergo interactions charged backbone PANI, leading to significant adsorption dyes. This phenomenon selective PANI reported first time and promises a green sulfonated organics wastewater. The experimental observations UV-vis spectroscopy, X-ray diffraction, conductivity...

We report a simple method to synthesize binary polymer brushes from two incompatible polymers of different polarity. The synthetic route is based on subsequent step-by-step grafting carboxyl-terminated polystyrene and poly(2-vinylpyridine) the surface Si wafer functionalized with 3-glycidoxypropyl-trimethoxysilane. end-functional were spin-coated substrate, was carried out at temperature higher than glass transition polymers. composition can be regulated kinetics first by change time or/and...

In this study, we report an approach for the adsorption and desorption of anionic (sulfonated) dyes from aqueous solution by doped polyaniline. have synthesized PANI with two dopants, namely, p-toluenesulfonic acid (PTSA) camphorsulfonic (CSA), used these to adsorb various dyes. It was found that selectively adsorbs does not cationic The causes variation in electrical conductivity PANI, indicating its potential as a conductometric sensor at very low concentration. adsorbed were desorbed...

We have studied the high-frequency (34 GHz) mobility of positive charge carriers on isolated ladder-type polymer chains in dilute solution. find that is limited by chain ends as long 35 monomers. The intrachain motion can be described one-dimensional diffusion between infinitely high reflecting barriers, representing ends. Our data indicate for close to 600 cm(2)/V s. With this a promising candidate future use an interconnecting wire molecular electronics.

A layer-by-layer (LbL) approach has been employed for the fabrication of multilayer thin films and microcapsules having nanofibrous morphology using nanocrystalline cellulose (NCC) as one components assembly. The applicability these nanoassemblies drug delivery carriers explored by loading an anticancer drug, doxorubicin hydrochloride, a water-insoluble curcumin. Doxorubicin good water solubility, is postloaded in In case curcumin, which very hydrophobic limited solubility water, stable...

In this work, we have synthesized a series of TDPP derivatives with different alkyl groups such as n-hexyl (−C6H13) 3a, 2-ethylhexyl (-(2-C2H5)C6H12) 3b, triethylene glycol mono methyl ether (-(CH2CH2O)3cH3, TEG) 3c, and octadodecyl (-(8-C8H17)C12H22) 3d. N,N dialkylation thiophene-diketopyrrolopyrrole (TDPP, 1) strongly influences its solubility, solid state packing, structural order. These materials allow us to explicitly study the influence chain on packing photophysical properties....

This paper describes the influence of donor group on solid state packing and electronic properties diketopyrrolopyrrole based small molecules.

A new class of donor-bridge-acceptor (D-π-A) π-conjugated light-emitting molecules comprising carbazole as donor and maleimide (Cbz-MI, Cbz-MI(d)), phthalimide (Cbz-Pth) acceptor units with phenyl ring spacer have been synthesized in good yields. These compounds exhibit high quantum yield three distinct emission colors yellowish-green (Cbz-MI), bright yellow Cbz-MI(d), sky blue the solid state. Single-crystal X-ray chemical calculations reveals that twisting rings torsional angle on reduce...

Abstract Donor-π-acceptor conjugated polymers form the material basis for high power conversion efficiencies in organic solar cells. Large dipole moment change upon photoexcitation via intramolecular charge transfer donor-π-acceptor backbone is conjectured to facilitate efficient charge-carrier generation. However, primary structural changes that drive ultrafast step have remained elusive thereby limiting a rational structure-function correlation such copolymers. Here we use...

Abstract Complementary circuits based on organic electrochemical transistors (OECTs) are attractive for the development of inexpensive and disposable point‐of‐care bioelectronic devices. Ambipolar OECTs, which employ a single channel material, could decrease fabrication complexity manufacturing costs such circuits. An ideal material ambipolar OECTs should be electrochemically stable in aqueous environments, afford facile ion insertion both cations anions, also facilitate high balanced...

The fabrication of organic light‐emitting devices (OLEDs) from semiconducting polymer nanospheres (SPNs) deposited aqueous dispersions is described. It found that the active device layer consists a homogeneous single SPNs. OLEDs exhibit an electroluminescence onset at SPN energy gap, which can be attributed to field‐enhanced charge‐carrier injection nanostructured Al cathode.

The diketopyrrolopyrrole-based copolymers PDPP-BBT and TDPP-BBT were synthesized used as a donor for bulk heterojunction photovoltaic devices. photophysical properties of these polymers showed absorption in the range 500-600 nm with maximum peak around 563 nm, while broadband 620-800 656 nm. power conversion efficiencies (PCE) polymer solar cells based on [6,6]-phenyl C61 butyric acid methyl ester (PCBM) 0.68% (as cast PDPP-BBT:PCBM), 1.51% (annealed 1.57% TDPP-BBT:PCBM), 2.78% under...

A series of fluoranthene derivatives (F1–F5) varied with nature and type substituents were synthesized via Diels–Alder reaction followed by in situ decarbonylation. The solid state structures have been established through single crystal X-ray diffraction (XRD). presence extended conjugation having two alkyloxy chains on phenyl rings induces flexibility to orient opposite each other interacts another unit weak π–π interactions show unique supramolecular arrangements. envisaged photophysical...

The present highlight discusses major work in the synthesis of low bandgap diketopyrrolopyrrole (DPP)-based polymers with donor–acceptor–donor (D–A–D) approach and their application organic electronics. It examines past recent significant advances which have led to development DPP-based materials phenyl thiophene as donors. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Chem. 2013, 51, 4241–4260

Abstract Herein we report a novel fluoranthene‐based fluorescent fluorophore 7,10‐bis(4‐bromophenyl)‐8,9‐bis[4‐(hexyloxy)phenyl]fluoranthene ( S 3 ) and its remarkable properties in applications of explosive detection. The sensitivity towards the detection nitroaromatics (NACs) was evaluated through fluorescence quenching solution, vapor, contact mode approaches. approach using thin‐layer silica chromatograp‐ hic plates exhibited femtogram (1.15 fg cm −2 limit for trinitrotoluene (TNT)...

We study the single-molecule transport properties of small bandgap diketopyrrolopyrrole oligomers (DPPn, n = 1–4) with lengths varying from 1 to 5 nm. At a low bias voltage, conductance decays exponentially as function length indicative nonresonant transport. However, at high we observe remarkably close 10–2 G0 currents reaching over 0.1 μA across all four oligomers. These unique properties, together density functional theory-based calculations, suggest mechanism resonant highly delocalized...

The advent of new-class high-mobility semiconducting polymers opens up a window to address fundamental issues in electrical transport mechanism such as hopping between localized states versus extended state conduction. Here, we investigate the origin ultra-low degree disorder (~ 16 meV) and band-like negative temperature (T) coefficient field effect electron mobility high performance diketopyrrolopyrrole (DPP)-based polymer. Models based on framework edge (ME) with exponential density are...

This review highlights recent advancement in developing ambient stable organic molecular semiconductors from the theoretical and experimental perspectives.