Rapid Capillary-Assisted Solution Printing of Perovskite Nanowire Arrays Enables Scalable Production of Photodetectors

Despite recent progress in producing perovskite nanowires (NWs) for optoelectronics, it remains challenging to solution-print an array of NWs with precisely controlled position and orientation. Herein, we report a robust capillary-assisted solution printing (CASP) strategy to rapidly access aligned and highly crystalline perovskite NW arrays. The key to the CASP approach lies in the integration of capillary-directed assembly through periodic nanochannels and solution printing through the programmably moving substrate to rapidly guide the deposition of perovskite NWs. The growth kinetics of perovskite NWs was closely examined by in situ optical microscopy. Intriguingly, the as-printed perovskite NWs array exhibit excellent optical and optoelectronic properties and can be conveniently implemented for the scalable fabrication of photodetectors.     

Facile Preparation of WO3−x Dots with Remarkably Low Toxicity and Uncompromised Activity as Co-reactants for Clinical Diagnosis by Electrochemiluminescence

The exceptional nature of WO_3−x dots has inspired widespread interest, but it is still a significant challenge to synthesize high-quality WO_3−x dots without using unstable reactants, expensive equipment, and complex synthetic processes. Herein, the synthesis of ligand-free WO_3−x dots is reported that are highly dispersible and rich in oxygen vacancies by a simple but straightforward exfoliation of bulk WS₂ and a mild follow-up chemical conversion. Surprisingly, the WO_3−x dots emerged as co-reactants for the electrochemiluminescence (ECL) of Ru(bpy)₃²⁺ with a comparable ECL efficiency to the well-known Ru(bpy)₃²⁺/tripropylamine (TPrA) system. Moreover, compared to TPrA, whose toxicity remains a critical issue of concern, the WO_3−x dots were ca. 300-fold less toxic. The potency of WO_3−x dots was further explored in the detection of circulating tumor cells (CTCs) with the most competitive limit of detection so far.     

An efficient synthesis of 6-benzyl-2-arylthieno[2,3-d]pyrimidin-4(3H)-ones catalyzed by HCl involving a Friedel-Crafts alkylation reaction

Aldehyde could undergo not only the subsequent condensation and cyclization with 2-aminothiophene-3-carboxamide to build a pyrimidine ring, but also a Friedel-Crafts alkylation reaction with thiophene moiety to give unexpected 6-benzyl-2-arylthieno[2,3-d]pyrimidin-4(3H)- ones in good yields catalyzed by concentrated HCl.     

Synthesis,crystal structure and optical property of manganese (II) halides based on pyridine ionic liquids with high quantum yield

Transition Metal Chemistry - Two novel tetrahedral Mn (II) halide single-crystals [(C7H10N)2][MnCl4] (1) and [(C7H10N)2][MnBr4] (2), based on pyridine ionic liquids, have been successfully...     

Two‐Dimensional Nanomaterials for Photothermal Therapy

Two‐dimensional (2D) nanomaterials are currently explored as novel photothermal agents because of their ultrathin structure, high specific surface area, and unique optoelectronic properties. In addition to single photothermal therapy (PTT), 2D nanomaterials have demonstrated significant potential in PTT‐based synergistic therapies. In this Minireview, we summarize the recent progress in 2D nanomaterials for enhanced photothermal cancer therapy over the last five years. Their unique optical properties, typical synthesis methods, and surface modification are also covered. Emphasis is placed on their PTT and PTT‐synergized chemotherapy, photodynamic therapy, and immunotherapy. The major challenges of 2D photothermal agents are addressed and the promising prospects are also presented.     

Thermal hazard assessment and ranking for organic peroxides using quantitative structure–property relationship approaches

Journal of Thermal Analysis and Calorimetry - Chemical reactivity hazards of organic peroxides are major concerns of the chemical industry due to many serious incidents every year. Thermal hazard...     

Esterification of α-olefins catalyzed by homogeneous and polymer supported phosphine - palladium - tin chloride complexes

The polymer phosphine ligand with various crosslinkage and phosphine contents was prepared by copolymerization of diphenylvinyl-phosphine with divinylbenzene using 2,2′ -azobisisobutyronitrile (AIBN) as initiator. Linear methyl heptanoate in high yield was obtained from hexene-l catalyzed by polymer-supported and homogeneous phosphine-palladium-tin chloride complex. Comparison with the homogeneous catalyst, the polymer catalyst had higher activity and almost the same selectivity. The effects of the catalyst composition, the structure of the polymer ligand and other experimental variables on the catalytic activity and selectivity of the polymer catalyst have been examined, and are discussed in relation to the mode of this catalysis.