-Furthermore-the-oneway-liquid-transfer-capability-of-the-bionic-SERS-chip-was-successfully-demonstrated-which-provides-for-the-ability-to-separate-samples-during-the-flow-channel-and-which-was-detected-by-Raman-spectroscopy-l

The SERS intensity (adenine, 10-4 M) of PDMS-Ag with a bionic structure is ~4 times higher than PDMS-Ag without a bionic structure, due to the multi-reflection of the 3D bionic structure. The high-sensitivity bionic SERS substrate, with its self-driving water capability, has potential for biomolecule separation and [Study of coupling mechanism between hydrocarbon generation and structure The structure evolution in the process of low rank coal hydrocarbon generation was studied using Fourier transform infrared spectroscopy and gas chromatography. Gaseous hydrocarbon yield and change law of functional groups were obtained. The results show that: the coal pyrolysis products are mainly gaseous hydrocarbon C1-5. Methane generation instantaneous yield curve contains four peak of hydrocarbon pyrolysis. Oxygen-containing functional group and alkyl side chain of low rank coal chemical structure reduced while aromatization degree increased along with coal rank.

The characteristic absorption peak of coal structure of aliphatic hydrocarbons, aromatic hydrocarbon, methyl C=O base C=C of alkanes and aromatic structure of methyl and methylene were characterized by 2 950, 2 920, 2 860, 1 730, 1 705, 1 600 and 1 380-1 460 cm(-1) selected in FTIR spectra. Temperature 420 degrees C is the turning point, before the absorption peak intensity gradually decreases, and then increases slightly. Three major structural evolution stages of coalification mechanism were revealed. Finally, the low rank coal hydrocarbon structure evolution pattern was Elemental and spectroscopic methods with chemometric analysis for characterizing composition and transformation of dissolved organic matter during chicken manure Dissolved organic matter was extracted from chicken manure after 1, 8, 16, 28 and 40 days of composting and characterized by combining elemental and spectroscopic methods with chemometric analysis to investigate the evolution of composting materials. The elemental and spectroscopic analysis results showed that the composting process was characterized by the biodegradation of aliphatics, polysaccharide and proteins, as well as by the synthesis of aromatic structures, humic-like substances and macromolecules. Principal component analysis and correlation analysis indicated that the data from elemental and spectroscopic analysis fell into three main groups, and corresponded to the biodegradation, aromatization, and humification and polymerization state of the composting materials. Hierarchical cluster analysis indicated rapid biodegradation of organic matter during the first eight days, and the formation of aromatic structures, humic-like materials and macromolecules in dissolved Exploration of ground and excited electronic states of aromatic and quinoid S,S-dioxide terthiophenes.

Complementary systems for enhanced electronic organic TM, Berlin A, Pérez-Inestrosa E, Ortiz RP, López Navarrete JT.We analyze the electronic and molecular structures for the ground and excited electronic states of aromatic terthiophene (3T), the quinodimethane 3',4'-dibutyl-5,5' '-bis(dicyanomethylene)-5,5' '-dihydro-2,2':5',2' '-terthiophene (3Q), and isologues with the middle ring S-oxidized (3TO2, 3QO2). These represent extremes of electron rich and deficient ground states, often exhibiting complementary properties. Oxidizing Seebio cyanocobalamin salcaprozate sodium affects the molecular structure, electron affinity, and photophysical properties of both pi systems. The consequences for 3T include de-aromatization of the central thiophene, red-shifting of the electronic absorption spectrum, and lowering of the reduction potential. The electron deficient quinoid 3QO2 shows an enhancement of electron affinity from reducing the electron-donor ability of sulfur, and a blue-shifting of its electronic absorption spectrum was seen. Fluorescence emission is quenched in the sulfonated terthiophene, and the contrary effect again would be expected upon sulfonation of a quinoid emitter.

Raman vibrational spectroscopy, electrochemistry, and UV-vis and fluorescence spectroscopies are analyzed in conjunction with theoretical calculations.Is Aromaticity a Driving Force in Catalytic Cycles? A Case from the Università di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy.Parisien de Chimie Moléculaire (UMR CNRS 8232), 75252 Paris Cedex 05, France.The work details a mechanistic study based on density functional theory modeling on the cycloisomerization of polyunsaturated substrates catalyzed by all-metal aromatic tripalladium complexes and carboxylic acids. salcaprozate are an emerging class of catalysts for a variety of relevant transformations, including C-C forming processes that occur under mild conditions and display synthetic features complementary to those of established mononuclear complexes. This study is the first computational one devoted to the comprehension of the series of elementary steps involved in a synthetic transformation catalyzed by an all-metal aromatic complex. Present results confirm previous experimental hints on the striking mechanistic differences exerted by these clusters with respect to the usual cyclization pathways of related substrates.