The standard enthalpies (ΔHR⦵) for the reaction: MX2(c) → M(DA)X2(c) (n = 1 for Zn, Cd and X = Cl, Br, I and n = 2 for Hg and X = Cl, Br) were determined by solution calorimetry. From known enthalpies of formation of metal halides and ligand, the enthalpies of formation of the adducts were obt...

The efficient separation of photoexcited electron-hole pairs acts as a significant factor and challenge for the enhanced photocatalytic activity of the photocatalyst. To pursue higher photocatalytic activity, carbon quantum dots (CQDs) modified bismuth oxychloride (BiOCl)/bismuth oxybromide (BiO...

The bismuth-catalyzed oxidative condensation of aldehydes with 2-aminobenzamide under aerobic conditions is reported using ethanol as the solvent. Good to excellent isolated yields (68–95%) of the corresponding 2-substituted quinazolinones were obtained under mild reaction conditions with excel...

Bismuth is a highly biocompatible and inexpensive metal with a high atomic number, which confers an important X-rays opacity. While bismuth oxide or bismuth sulphide have been extensively studied in imaging, little is known about metallic bismuth nanoparticles. The latter are more attractive for...

Bismuth sulfide (Bi2S3) is a promising semiconductor for optoelectronic applications. In this work we show that different morphologies of Bi2S3 such as nanofibers, nanorods or nano-hedgehogs, can be obtained by microwave assisted solution synthesis. The morphology of the products largely depends...

Among nitrogen oxide (NO2), methane (CH4), isobutane (i-C4H10) and carbon monoxide (CO) gases; selective CO sensing has been reported for perovskite p-type bismuth iron oxide (BFO) gas sensor at 200 °C. We have adopted glycine based auto-combustion route to synthesize phase pure BFO powders. Fo...

The development of new safe inorganic UV filters to effectively protect the skin from ultraviolet (UV) radiation effects is an emerging issue. Bismuth titanate-based UV filters embedded into mesoporous silica nanoparticles (MSN) represent a new class of inorganic sunscreens, with excellent UVA a...

A methionine methyl ester-modified coumarin derivative was designed and synthesized, which could discriminate Cu2+ from other metal ions in HEPES buffer (10 mM, pH 7.4)/CH3CN (40:60, V/V). The detection limit of WM toward Cu2+ was 1.84 × 10−7 M, which was lower than the concentration of Cu2+ in...

Isoniazid-naphthoquinone hybrids were synthesized and evaluated against a susceptible (H37Rv) strain and two isoniazid-resistant strains (INHR1 and INHR2) of Mycobacterium tuberculosis. The antimycobacterial activity of the derivatives was determined based on the resazurin microtiter assay and t...

Convenient and regioselective syntheses of 1,2-annulated, and 1,2-, 5,6- and 1,2-, 7,8-bisannulated polycyclic indolizine derivatives have been achieved by one-pot tandem reactions of cyclic N-ylides derived from the corresponding N-substituted pyridinium, quinolinium, and isoquinolinium salts 1...

3,4-Dichloro-3-cyclobutene-1,2-dione was reacted with various aromatics to yield 3,4-bisaryl-3-cyclobutene-1,2-diones. Their naphthoquinone analogues were also synthesized.

A one-pot, multi-component coupling reaction of aromatic aldehydes, 2-naphthol and semicarbazide (hydrochloride)/thiosemicarbazide using LaCl3/ClCH2COOH as an efficient catalyst system under solvent free condition at elevated temperature was investigated. High yields, short reaction time, easy w...

A liquid chromatography–mass spectrometry method to detect semicarbazide and lactose semicarbazone in milk was developed as part of a programme to set up methods for detecting the economically motivated adulteration of raw milk with nitrogen-containing compounds. The detection of semicarbazide ...

The (E)‑1‑(3, 5 dibromo benzylidene) semicarbazide (35DBBS) has been synthesized and characterized using Fourier-transform infrared (FT-IR), Fourier transform Raman (FT-Raman), 1H and 13C Nuclear magnetic resonance (NMR) spectral analyzes. Fukui functions, molecular electrostatic potential (MEP)...

Semicarbazide (SMC), an emerging water contaminant, exerts anti-estrogenic effects in female zebrafish. However, the exact influence of SMC on male reproduction remains unclear. In this study, adult male zebrafish were exposed to 1–1000 μg/L SMC in a semi-static system for 28 d prior to examin...

Starch and semicarbazide hydrochloride heated either convectionally or in the field of microwaves reacted into O-(C-carbamoylated) starch. The products retained their hydrochloride salt character making them cationic. Both heating methods provided approximately the same products. The macrostruct...

A ninety-day toxicity study of semicarbazide hydrochloride (SEM-HCl) was conducted in male and female Wistar Hannover GALAS rats fed diet containing the compound at concentration of 0, 250, 500 and 1000 ppm. Suppression of body weight gain and food consumption was found in both sexes at 1000 ppm...

We performed a combined study to determine the chronic toxicity and carcinogenicity of semicarbazide hydrochloride (SEM-HCl). Male and female Wistar Hannover GALAS rats were fed a diet containing SEM-HCl at 0, 10, 50, and 250 ppm for 52 weeks (10 rats/sex/group) or for 104 weeks (50 rats/sex/gro...

Synthetic food colours are produced by full chemical synthesis or by chemical modification of several precursor compounds and are therefore in contrast to natural food colours, which are usually extracted from several natural sources and purified. They can be classified as azo-dyes (Tartrazine, ...

Tetrakis(trialkylsilyl) diphosphate (alkyl = Me, Et, iPr, tBu) can be obtained in quantitative yield by reacting commercial disodium dihydrogen diphosphate with the respective trialkyl chlorosilane in a triphasic system with formamide. The alkylsilane residues of the diphosphate silyl esters can...