Search

Sunset yellow, as a common pigment, is harmful to people’s health. In this work, a new sensitive adsorbent based on the chlorination peanut shell and HBP-NH2 was fabricated via one-step synthesis. Optimization of the modified peanut shell was carried out at different temperatures, different molar ratios of reagents, and different time intervals in HBP-NH2 using Response Surface Methodology (RSM) for the first attempt. The structure of modified peanut shell was characterized by FT-IR, SEM, and TGA analysis. The adsorption properties of the modified peanut shell for Sunset yellow were investigated by batch and column experiments. Batch adsorption’s results suggested that modified peanut shell had a high adsorption capability for Sunset yellow and its maximum saturated adsorption capacity was 468.0 mg/g at 308 K, estimated from the Langmuir model. Furthermore, the modified peanut shell can be eluted easily using 3 mol/L NaOH. The proposed method was successfully applied to quantify the amount of SY in jelly and soft drinks with good recovery valuing from 98 to 104%. Hence, the proposed sensor shows a rapid and sensitive method, low cost, and simple, which is appropriate for alternative technique use for the analysis of food colorants in commercial products.

2,6-Dialkylphenyldithieno[3,2-b:2′,3′-d]thiophene derivatives (DPCn–DTT) were synthesized and characterized. Effect of alkyl groups on optical characteristics, electrochemical properties, film-forming ability, and field-effect performance was studied. The four compounds DPCn–DTT show almost the same energy levels of the highest occupied molecular orbits and optical energy gaps, but they exhibit different charge carrier transport characteristics. The thin film transistors based on DPC1–DTT with the shortest alkyl groups (methyl groups) show the highest mobility of 0.54 cm2 V−1 s−1. Substrate temperature and surface modification of the SiO2 insulators have a remarkable effect on field-effect performance. High-quality microribbons of DPC8–DTT with octyl groups were prepared by a solution-phase self-assembly process. Single crystal field-effect transistors based on an individual DPC8–DTT microribbon exhibit a high mobility of 1.1 cm2 V−1 s−1 with a current on/off ratio of 6.5 × 104.

Two structural isomers of six-fused-ring sulfur-containing molecules were synthesized as active materials for p-type organic field-effect transistors, and their optical and electrochemical properties were characterized. Field-effect transistors based on these compounds were fabricated to investigate the relationships between structures and semiconductor properties.

The synthesis and characterization of four new organic semiconductors with thieno[3,2-b][1]benzothiophene cores and different π-bridge spacers are reported. Cyclic voltammetry measurement indicates that the materials have low energy levels of the highest occupied molecular orbitals and large band gaps. The single-crystal X-ray diffraction experiment reveals that 1,2-di(thieno[3,2-b][1]benzothiophenic-2-)ethylene (DTBTE) molecules have a nearly coplanar structure and crystallize into a herringbone arrangement with strongly intermolecular multiple S···S, S···C, and CH···π interactions. These interactions facilitate charge carrier transport. The DTBTE-based organic thin-film transistors (OTFTs) on an octyltrichlorosilane-modified SiO2/Si substrate exhibit good field-effect performance with the highest mobility of 0.50 cm2 V–1 s–1. Furthermore, the DTBTE-based OTFTs have been fabricated on a flexible polyethylene terephthalate substrate and showed a maximum mobility of up to 0.45 cm2 V–1 s–1, indicating its p...

A highly π-extended copolymer, PPTT, was developed based on 6H-phenanthro[1,10,9,8-cdefg]carbazole (PCZ) and thiazolo[5,4-d]thiazole derivative units, being the first PCZ-containing polymer, as well as its first applications in OTFTs and OPVs. This polymer exhibited an excellent solubility in several common organic solvents, a good film-forming ability, a reasonably high thermal stability, and a deep-lying HOMO energy level, meeting well the requirements of OTFTs and OPVs. The investigation of the field-effect and photovoltaic performances demonstrated that PPTT had a high hole mobility of 0.13 cm2 V−1 s−1 and good power conversion efficiency (PCE) of 3.20%, which were among the highest mobilities and PCEs for a single polymer material with dual transistor and OPV functions simultaneously.

A fused-seven-ring anthracene derivative with two sulfur bridges, benzobisthioxanthene (BTA), was synthesized, facilely. OLEDs employing BTA as the emitter exhibited bright (maximum 40,752 cd m(-2)) and efficient red emission (CIE, x = 0.64, y = 0.36) with a luminous efficiency of 4.4 cd A(-1).