Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
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#1Aleksandr A. Khrebtov (Far Eastern Federal University)
#2Elena V. Fedorenko (RAS: Russian Academy of Sciences)H-Index: 14
Last. Anatolii G. Mirochnik (RAS: Russian Academy of Sciences)H-Index: 9
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Abstract null null The spectral properties and solvatochromic behavior of boron difluoride ortho-hydroxydibenzoylmethanates in polymer matrices with different polarity (polystyrene, polyvinyl chloride, polycarbonate, poly(methyl methacrylate)) were investigated. The specific interaction of polystyrene, polycarbonate and poly(methyl methacrylate) with the investigated fluorophores was revealed. It was shown that the dyes are capable to form exciplexes with phenyl rings of polystyrene. The spectra...
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#1Lucia M. Lepodise (Botswana International University of Science and Technology)H-Index: 5
#2Romang Bosigo (Botswana International University of Science and Technology)H-Index: 1
Abstract null null High fertility of the terra preta soils is often attributed to the high concentration of aromatic compounds found in these soils. Chemical characterization of two soil samples collected from different locations in Botswana has shown some similar properties with terra preta. Fourier Transform Infrared (FTIR) analysis revealed five common absorption bands between the soil samples and the aromatic compounds. The common bands were found to be due to the vibration of the benzene ri...
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#1Gregor Hostnik (University of Maribor)H-Index: 2
#2Jelena Tošović (University of Maribor)H-Index: 11
Last. Urban Bren (University of Primorska)H-Index: 16
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Abstract null null The pH dependence of the UV/Vis spectrum of gallic and ellagic acid was measured in a buffer-free solution to obtain reliable data at wavelengths bellow 230 nm. UV/Vis absorption spectra were also calculated for all possible ionised species of gallic and ellagic acid using time dependent density functional theory (TD-DFT). From p null null null null null K null null null a null null null null null null values of gallic and ellagic acid the molar fraction of different ionised s...
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#1Wenxian Wei (YZU: Yangzhou University)H-Index: 9
#2Dan Yu (Xuzhou Medical College)H-Index: 1
Last. Qingli Huang (Xuzhou Medical College)H-Index: 2
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Abstract null null Au-Ag alloy nanoparticles (NPs) with controllable size and composition were synthesized by a facile, one-pot hydrothermal method. Various characterization techniques including TEM, UV-vis, EDX, HAADF-STEM and XPS were used to discuss the influencing factors for the size and composition of Au-Ag alloy NPs. It is obvious that the size and composition of Au-Ag alloy NPs could be adjusted by the experimental parameters. Catalytic and SERS performance of the Au-Ag alloy NPs were fu...
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#1Waleed Ahmed El-Said (Assiut University)H-Index: 23
Last. Jeong-Woo Choi (Sogang University)H-Index: 51
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Abstract null null A novel optical γ-aminobutyric acid (GABA)-based sensor was developed on interacting thiol compounds and o-phthalaldehyde (OPA) to form thiacetal compounds. Then, the thiacetal interacts with the GABA molecule to form an isoindole compound. The effects of four thiol compounds on the stability of the resulting isoindole compound were assessed. The 2-mercaptoethanol, “one of the most used derivatizing agents,” is unexpectedly the least stable; while, 16-mercaptohexadecanoic acid...
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Abstract null null Herein, we prepared a novel fluorescent polymer carbon nanoparticles by polymerizing dopamine (DA) and o-phenylenediamine (OPD) through oxidation of hydrogen peroxide. In a neutral environment, the synthesized fluorescent polymer carbon nanoparticles (PDA-OPD) exhibited two emission peaks at 460 nm and 540 nm with 400 nm excitation wavelength. In an acidic environment, the fluorescence emission peaks of PDA-OPD at 540 nm showed an obvious fluorescence quenching, and there exis...
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#1Sobhan Asadpour Chounechenan (University of Gilan)
#2Asadollah Mohammadi (University of Gilan)H-Index: 15
Last. Hossein Ghafouri (University of Gilan)H-Index: 5
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Abstract null null In this paper, a new and effective diaminopyrimidine-based chemosensor (DAPCS) was developed for the highly selective and ultra-sensitive detection of Cu2+ ion in aqueous media and living cell. Characterization and structure determining of DAPCS was determined by UV–Vis, FTIR and NMR analyses. It is observed that DAPCS and Cu (II) forms a ligand to metal charge transfer (LMCT) complex which produces distinguishable red color. The results also indicate that the DAPCS easily int...
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#1Yong ZhangH-Index: 2
#2Min Yang (SEU: Southeast University)H-Index: 2
Last. Min Ji (SEU: Southeast University)H-Index: 19
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Abstract null null Hydrogen peroxide (H2O2), a member of small-molecule reactive oxygen species (ROS), plays vital roles in normal physiological activities and the occurrence of many diseases. In this work, two off–on fluorescent probes, QX8A-H2O2 and QX9A-H2O2, were firstly designed for H2O2 detection with novel fused quinoxalines as the fluorophores and boronate moiety as the reaction sites. By comparing the optical properties, QX9A-H2O2 with better performance was selected for further studies...
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#1Jaspreet Singh (OU: University of Oklahoma)H-Index: 2
#2Robert L. White (OU: University of Oklahoma)H-Index: 15
Abstract null null A new approach for mid-infrared spectroscopy measurements of liquids is described. Thin layers of liquid samples are analyzed by using a modified button sample holder that incorporates a reservoir. To obtain spectra, buttons containing liquid samples are placed at the infrared beam focus of a praying mantis diffuse reflection optical system. Infrared radiation absorption path lengths can be adjusted by changing the quantity of liquid added to the reservoir. Thin film transflec...
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#1Sangram B. Kharade (Shri Jagdishprasad Jhabarmal Tibrewala University)
#2Rajvardhan K. Chougale (Shivaji University)
Last. Ganesh S. Kamble (Shri Jagdishprasad Jhabarmal Tibrewala University)H-Index: 9
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Abstract null null In this article, a novel spectrophotometric reagent 1-(pyrimidine)-4, 4, 6-trimethyl-1,4-dihydropyrimidine-2-thiol [PTPT] has been synthesized for liquid–liquid extraction and spectrophotometric determination of copper(II). The as-synthesized ligand has been selectively forms stable complex with copper(II) in basic medium (pH 9.0), in presence of mild pyridine the extraction and color stability has found to be synergistically enhanced. The equilibrium time is 10 min for effect...
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