Three novel copolymers containing alternating 1,4-bis(phenylethenyl)benzene, 1,4-bis(phenylethenyl)-2,5-dimethoxybenzene or 1,5-bis(phenylethenyl)naphthalene chromophores and crown ether (CE) spacers within the polymer backbone were synthesized by Wittig polycondensation reaction. These exhibit good thermal stability (decomposition temperature around 380–411 °C). Photoluminescence (PL) electroluminescence (EL) color can be easily tuned in these simply changing structure of chromophores....

Organic light-emitting devices exhibiting high power conversion efficiency and long operating lifetime may potentially be achieved with the polymer electrochemical cell (LEC) configuration. An LEC device typically uses a thin layer of conjugated sandwiched between two contact electrodes. The contains an ionically conductive species that are essential in formation p-i-n junction. characterized balanced electron hole injections, current density at relatively low bias voltages (2-4 V),...

The polymer light-emitting electrochemical cells (LECs) were fabricated with MEH−PPV as the luminescent and ionic liquid of imidazolium salts supporting electrolyte. utilized include various 1-methyl-3-alkylimidazolium alkyl substituents butyl (bmim), dodecyl (dmim), tetradecyl (tmim), or hexadecyl (hmim) anions PF6- BF4-, which possess different melting points from room temperature for [bmim+][PF6-] to 83 °C [hmim+][PF6-]. electroluminescent (EL) properties electronic structure LECs...

Owing to their narrow bright emission band, broad size-tunable wavelength, superior photostability, and excellent flexible-substrate compatibility, light-emitting diodes based on quantum dots (QD-LEDs) are currently under intensive research development for multiple consumer applications including flat-panel displays flat lighting. However, commercialization is still precluded by the slow date of efficient QD-LEDs as even highest reported efficiency 2.0% cannot favorably compete with organic...

A new class of nanoscale light‐harvesting discotic liquid crystalline porphyrins, with the same basic structure best photoreceptor in nature (chlorophyll), was synthesized. These materials can be exceptionally aligned into a highly ordered architecture which columns formed by intermolecular π–π stacking are spontaneously perpendicular to substrate. The homeotropic alignment, well confirmed synchrotron X‐ray diffraction, could not only provide most efficient pathway for hole conduction along...

In this work, we report the design and application of a new ratiometric fluorescent probe, which contains different-colored quantum dots (QDs) as dual fluorophores, ultrathin silica shell spacer, meso-tetra(4-sulfonatophenyl)porphine dihydrochloride (TSPP) receptor, for Zn2+ detection in aqueous solution living cells. architecture our designed plays key roles controlling locations QDs, TSPP, Zn2+, preventing direct contact between QDs but affording fluorescence resonance energy transfer...

A series of two-dimension-conjugated D–π–A copolymers based on benzodithiophene (BDT) or benzodifuran (BDF) as the donor unit, benzothiadiazole (BT) acceptor unit and thiophene π-bridge, were designed synthesized for application materials in polymer solar cells (PSCs). The polymers include PBDTT-BT BDT with a side chain, PBDTF-BT furan PBDFT-BT BDF chain PBDFF-BT chain. replacement some rings influences UV-vis absorption spectra, electronic energy levels band gaps copolymers. HOMO are ca....

The combination of microbead array, isothermal amplification, and molecular signaling enables the continuous development next-generation diagnostic techniques. Herein we reported implementation nicking endonuclease-assisted strand displacement amplification reaction on quantum dots-encoded (Qbead), demonstrated its feasibility for multiplexed miRNA assay in real sample. Qbead featured with well-defined core–shell superstructure dual-colored dots loaded silica core shell, respectively,...

Bilayer- and bulk-heterojunction solar cells based on liquid crystalline porphyrins (donors) were fabricated by solution processing. These are (i) highly absorptive over the wavelengths of spectrum, (ii) having energy levels matched well with electron acceptors anode materials to facilitate charge separation transfer, (iii) a unique homeotropically aligned architecture for efficient transport light harvesting. Thermal annealing these induced alignments in photoactive layers, leading factor...

The unique temperature-dependent solubility of liquid crystalline poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) enabled us to construct the first bilayer-bulk-heterojunction devices based on a PBTTT:PCBM (1:2)/MDMO-PPV:[70]PCBM (1:4) active layer. bilayer device exhibited an extended optical absorption over solar spectrum and concentration gradient that enhanced charge carrier transport. Postannealing yielded Voc 0.59 V, Jsc values 10.1−10.7 mA/cm2, FF 0.50, PCE 3.0−3.2%,...

An array of Qbead@SiO₂ integrated with target binding, hybridization chain reaction and staining achieved colorimetric detection multiplex miRNAs.

Using a thin film of deoxyribonucleic acid-cetyltrimetylammonium (DNA-CTMA) complex as hole-transporting/electron-blocking layer, we have developed sequential solution-processing approach for constructing multilayer (up to five layers) white polymer light-emitting diodes, incorporating the poly(9,9-dioctylfluorene-2,7-diyl)/poly[2-methoxy-5(2′-ethyl-hexyloxy)-1, 4-phenylene vinylene] emissive layer. These devices were demonstrated show low turn-on voltage (∼5V), high efficiency (10.0cd∕A),...

We have developed a proof-of-concept quantum dot–ligand (QD–L) system for visual selective detection of nucleic acids, in combination with ratiometric fluorescence technique. This comprises dual-emission QDs nanohybrid formed by embedding red-emission QD (rQD) silica nanoparticle and electrostatically assembling green-emission (gQDs) onto the surface, as signal displaying unit, hydrophobic compound, dipyrido[3,2-a:2′,3′-c]phenazine (dppz), attached gQDs surface via phase transfer, ligand...

In this work, we report a new type of quantum dot (QD)-based fluorescence resonance energy transfer (FRET) assembly and its utility for sensing Zn2+ in different media. The on the QD scaffold is via first coating poly(dA) homopolymer/double-stranded DNA, followed by loading meso-tetra(4-sulfonatophenyl)porphine dihydrochloride (TSPP), both which are electrostatic, offering advantages cost-efficiency simplicity. More importantly, biopolymer minimizes interfacial thickness to be ≤2 nm QD-TSPP...

The combination of microbead array with assay chemistry isothermal amplification enables the continuous development nucleic acid detection techniques. Herein we report implementation ligation-rolling circle (RCA) reaction on quantum dots-encoded (Qbead) for multiplex G-quadruplex (G4) forming sequences. time RCA Qbead was optimized to be 60 min. Zinc phthalocyanine (ZnPc), a molecular "light switch", selected as G4-specific label. In presence target, target-triggered ligation-RCA produced...

Efficient white polymer light-emitting diodes (WPLEDs) were fabricated on the basis of three kinds luminescent polymers: poly{2-[3',5'-bis(2' '-ethylhexyloxy)benzyloxy]-1,4 phenylenevinylene}-co-poly(2-methoxy-5-(2'-ethyl-hexy loxy)-1,4-phenylene vinylene) (BE-co-MEH-PPV), red; poly(6,6'-bi-(9,9'-dihexylfluorene)-co-(9,9'-dihexylfluorene-3-thiophene-5'-yl)) (PFT), green; and poly(9,9-dioctylfluorene-2,7-diyl) (PFO), blue. In order to overcome complicated cascade energy transfer deep trapping...

Microbial fuel cells (MFCs) are effective biofuel devices that use indigenous microbes to directly convert chemical energy from organics oxidation into bioelectric energy. To maximize energy-converting efficiency for bioelectricity generation in MFCs, redox mediators (RMs) (e.g., extracts obtained plant resource-Camellia green tea) have been explored optimal stimulation upon electron transfer (ET) capabilities. Anthocyanins natural antioxidants widely used food science and medicinal...

Spherical nucleic acids that consist of high-density oriented strands allow for tailoring DNA computation and nanomachines provide a unique nanoscale platform biosensing bioimaging. Herein, we report the construction core–shell-nanostructured dual-emission quantum dot-loaded cerasome spherical acid (QD2@C-SNA), its use as an intracellular nanobiosensor via AND gate-guided dual-DNAzyme walker-mediated resonance energy transfer at interface. QD2@C-SNA has inner core (∼123 nm) red-...

DNA is an attractive medium for long-term data storage because of its density, ease copying, sustainability, and longevity. Recent advances have focused on the development new encoding algorithms, automation, sequencing technologies. Despite progress in these subareas, most challenging hurdle deployment remains reliability preservation repeatability reading. Herein, we report construction a magnetic bead spherical nucleic acid (MB-SNA) composite microstructure use as cost-effective platform...

The combination of functional nucleic acids and nanomaterials enables the continuous development hybrid nanosystems that have found wide applications including chemo/biosensing. Herein, we report supramolecular assembly a "sesame biscuit"-like superstructural nanosystem based on aptamer, quantum dot (QD), graphene oxide (GO), its diverse in Pb2+ pH sensing. was assembled via adsorbing silica-encapsulated green-emitting QD onto edge GO by ionic interaction, followed absorbing aptamer-modified...