UV–vis, steady state and time-resolved spectroscopic investigations were made on photoinduced charge separation and thermal charge recombination processes involved within a novel synthesized dyad, 1-(4-chloro-phenyl)-3-(4-methoxy-naphthalen-1-yl)-propenone (MNCA) where the donor 1-methoxynaphth...

2-Alkoxynaphthalenes undergo halogenation with copper(II) halides in the 1-position though 2-benzyloxynaphthalene with copper(II) bromide gives additionally di-β-naphthol, 1-benzyl-2-naphthol, and benzyl bromide. The reaction of 1-alkoxynaphthalenes with copper(II) halides leads to 1-alkoxy-4-h...

2-(6-Methoxy-2-naphthyl)propionic acid (4), dl-naproxen, was conveniently prepared by the regioselective reaction of alkyl 2-chloro-2-alkylthio-propionate (2) and 2-methoxynaphthalene (1) in good yield. This Friedel-Crafts reaction was found to be applicable to the other electron-rich aromatics.

The phase-resolved method has been widely used in photoacoustic spectroscopy for separating the contribution of different optical absorption centers to a spectrum. However, the procedure is lengthy, tedious and without precision control, because one has to calculate several spectra to search for...

Maritime transport has been playing a decisive role in global trade. Its contribution to the air pollution of the sea and coastal areas has been widely recognized. The air pollutant emission inventories of several harbors in China have already been established. However, the emission factors of l...

The genus Ipomovirus is one of six currently recognized genera in the family Potyviridae. The complete nucleotide sequence of Squash vein yellowing virus (SqVYV), a putative ipomovirus recently described in Florida, has been determined. The 9836 nt SqVYV genomic RNA [excluding the poly(A) tail] ...

Grapevine yellows (GY) are a significant threat to grapes due to the severe symptoms and lack of treatments. Conventional diagnosis of the phytoplasmas associated to GYs relies on symptom identification, due to sensitivity limits of diagnostic tools (e.g. real time PCR) in asymptomatic vines, wh...

RING is a really interesting new gene which plays important regulatory roles in many developmental processes as well as in plant-environment interactions. In the present report, the ZmRHCP1 gene encoding a putative RING-HC protein was isolated from maize and characterized. The ZmRHCP1 protein co...

From 1990 to 2017, the number of vehicles in China increased sharply from 5 million to 310 million, and vehicle emissions became one of the major sources of air pollution. Among the main sources of PM2.5 in Beijing, the contributions from vehicle sources increased from 5.6% (2000) to 31.1% (2012...

To provide stable and low-cost naturally derived yellow pigments, a variety of food byproducts were evaluated and the constituents of lemon peel have emerged yielding a highly promising natural product with applications as a food dye. Here we report a new, highly stable and water soluble food dy...

Novel yellow phosphor based on BaSi2O5:Gd3+&Mn2+ was prepared via melt-quenching technique. Different heat treatment schedules, based on Differential Thermal Analysis (DTA), were applied to study sequence of crystallization. X-ray diffraction (XRD) confirmed crystallization of pure sanbornite (B...

HC-Pro is a helper component-proteinase which acts as a multifunctional protein in the potyviral life cycle. Apart from its proteolytic activity, HC-Pro has the capacity to bind duplex small RNAs (sRNAs). To investigate HC-Pro-mediated sRNA binding in vitro, high amounts of purified protein are ...

A Novel chemosensor R possessing napthoquinone substituted benzaldehyde has been successfully designed, synthesized and characterized using NMR and mass spectral techniques. The receptor exhibits striking colour change from pale yellow to intense green with sodium cyanide in DMF-H2O (80–20% v/v...

Five new chemo-receptors, based on arylamino-naphthoquinone, possessing electron donating and electron withdrawing substituents have been prepared by single step green method. These receptors are found to be highly selective and sensitive towards cyanide ions in aqueous HEPES buffer solution (pH...

We reported a novel indolium salt -based colorimetric and fluorescent probe N1 for cyanide. The probe N1 showed a bleaching solution and fluorescence quenching toward CN− in 100% aqueous solution over other anions. In UV-vis and fluorescent spectrometry method, a large blue shift (261 nm), color...

New coumarin based allylidenemalononitrile-aminophenyl conjugated fluorescent dyes having donor-π-acceptor-donor (D-π-A-D) system (Dyes 1, 2 and 3) were synthesized and characterized using 1H/13C-APT NMR and HRMS. Interestingly, dye 3 (diacetamide derivative) was obtained as a mixture of E/Z i...

A new quinone-benzothiazole imine based chemodosimeter (R) was rationally designed, synthesized and characterized using NMR and mass spectral techniques. The receptor colorimetrically senses cyanide in aq. HEPES buffer: DMF (2:8 v/v) solution with an instantaneous colour change from yellow to bl...

An ionic liquid-modified diarylethene was synthesized and characterized. Its photochromic properties in a variety of solutions were studied. Compared to the neutral diarylethene, the closed-ring isomer of the ionic liquid-modified diarylethene exhibits obvious solvent-dependence. The closed-ring...

A novel synthetic method for the preparation of perfluoroallyl cyanide CF2CFCF2CN (PFACN) is presented. This includes the addition – elimination reaction of cyanide anion with perfluoroallyl fluorosulfate CF2CFCF2OSO2F (PFAFS). The reaction conditions, factors affecting the reactivity and regio...

A bisimidazole ensemble (R) possessing naphthoquinone as signaling unit is synthesized and characterized using 1H and 13C NMR and LC-MS spectral techniques. Anion sensing behaviour of the receptor has been investigated using electronic and fluorescence spectral techniques. The receptor exhibits ...