boron and cyanogen

In this study, a neoteric self-enhanced nanocomposite boron carbon nitride nanosheets (BCN NSs)-Ru obtained by chemical crosslinking between boron carbon nitride nanosheets (BCN NSs) and tris (4,4'-dicarboxylicacid-2,2'-bipyridyl) ruthenium(II) dichloride (Ru(dcbpy)

Topics: Biosensing Techniques; Boron; DNA; Electrochemical Techniques; Humans; Limit of Detection; Luminescent Measurements; Nanocomposites; Nitriles; RNA, Messenger; Thymidine Kinase

Fundamental understanding of microRNA (miRNA) regulated cellular processes requires smart tools capable of imaging the expression and distribution of miRNAs in living cells. However, the low-expression of miRNA and a complex intracellular environment bring great challenges for intracellular miRNA imaging. We found that boron doped g-C

Topics: Biosensing Techniques; Boron; Cell Line; Cell Survival; Copper; Fluorescent Dyes; Humans; Limit of Detection; MicroRNAs; Microscopy, Confocal; Nanostructures; Nitriles; Nucleic Acid Amplification Techniques; Nucleic Acid Hybridization

The rational design of heteroatom-doped C3N4 offers a great opportunity to optimize C3N4 performance. In this communication, we propose a facile method to fabricate layered-stacked B-doped C3N4 (BCN-800) ultrathin nanosheets via a one-step calcination route. The distinctive layered-stacked structure and the presence of B atoms provide an active attachment point for antibodies and antigens. In addition, the presence of C and N might aid stability and increase conductivity. When used for vomitoxin detection, the BCN-800-based electrochemical biosensor exhibits high sensitivity with a detection limit of 0.32 pg mL-1 and superior selectivity to other interfering agents.

Topics: Biosensing Techniques; Boron; Boronic Acids; Electrochemical Techniques; Food Contamination; Food Safety; Nitriles; Particle Size; Surface Properties; Trichothecenes

A novel Cu and boron doped graphitic carbon nitride catalyst (Cu-CNB) was synthesized using cheap precursors and systematically characterized. The selective oxidation of toluene proceeded very smoothly over the catalyst at 70 °C using tert-butyl hydroperoxide (TBHP) as the oxidant to exclusively afford benzaldehyde. The catalyst can be used for at least five cycles without decrease in activity and selectivity.

Topics: Benzaldehydes; Boron; Catalysis; Copper; Equipment Reuse; Hot Temperature; Nitriles; Oxidation-Reduction; tert-Butylhydroperoxide; Toluene

Boron-doped diamond (BDD) films are excellent electrode materials, whose electrochemical activity for some analytes can be tuned by controlling their surface termination, most commonly either to predominantly hydrogen or oxygen. This tuning can be accomplished by e.g. suitable cathodic or anodic electrochemical pretreatments. Recently, it has been shown that amorphous carbon nitride (a-CNx) films may present electrochemical characteristics similar to those of BDD, including the influence of surface termination on their electrochemical activity toward some analytes. In this work, we report for the first time a complete electroanalytical method using an a-CNx electrode. Thus, an a-CNx film deposited on a stainless steel foil by DC magnetron sputtering is proposed as an alternative electrode for the simultaneous determination of dopamine (DA) and ascorbic acid (AA) in synthetic biological samples by square-wave voltammetry. The obtained results are compared with those attained using a BDD electrode. For both electrodes, a same anodic pretreatment in 0.1 mol L(-1) KOH was necessary to attain an adequate and equivalent separation of the DA and AA oxidation potential peaks of about 330 mV. The detection limits obtained for the simultaneous determination of these analytes using the a-CNx electrode were 0.0656 μmol L(-1) for DA and 1.05 μmol L(-1) for AA, whereas with the BDD electrode these values were 0.283 μmol L(-1) and 0.968 μmol L(-1), respectively. Furthermore, the results obtained in the analysis of the analytes in synthetic biological samples were satisfactory, attesting the potential application of the a-CNx electrode in electroanalysis.

Topics: Ascorbic Acid; Boron; Diamond; Dopamine; Electrochemical Techniques; Electrodes; Humans; Limit of Detection; Nitriles