Synthesis,Characterization and Biological Activities of Novel Acrylamide Compounds

With dimethomorph and flumorph as the leading compounds, four novel acrylamide compounds with two types of structure were designed and synthesized by means of the method of ＂me too chemistry＂. The target compounds were characterized by 1H NMR, IR, MS, and elemental analysis. The influences of solvent and raw material on the yield were investigated and optimum processing conditions were determined. The results of preliminary biological tests show that all those compounds exhibit certain antifungal activities.

Synthesis and Structure of Tetraploid (Imidazole) Copper(II) Terephthalate,[Cu(Im)_4](teph)

The crystal structure of \[Cu(Im)_ 4 \](teph) (Im=imidazole,teph=terephthalate) has been determined by X-ray crystallography. It crystallizes in the triclinic system,space group P ī with cell dimensions of a =0.80356(16) nm, b = 0.84269(17) nm,c =0.88967(18) nm,α =76.90(3)°,β =68.95(3)°,γ =75.94(3)°,and Z =1. Its structure of the title compound is composed of discrete monomeric molecule of \[Cu(Im)_ 4 \]-(teph). The copper(II) ions have a square plane geometry with the CuN_ 4 chromophore.

Crust-Mantle Interaction in Dabie Orogenic Belt, Central China: Geochemical Evidence from Late Cretaceous Basalts

It has been suggested that eclogites in the Dabie orogenic be lt are exhumation products, which had subducted into the deep-seated mantle and undergone ultra-high pressure metamorphism during the Triassic. But no direct evidence supports this process except the calculated p-T conditions from mineral thermobarometers. The Late Cretaceous basalts studied in the prese nt paper, however, have provided some geochemical evidence for crust-mantle int eraction in the area. These basalts are distributed in Mesozoic faulted basins i n central and southern Dabie orogenic belt. Since little obvious contamination f rom continental crust and differentiation-crystallization were observed, it is suggested, based on a study of trace elements, that the basalts are alkaline and resultant from batch partial melting of the regional mantle rocks, and share th e same or similar geochemical features with respect to their magma source. In th e spider diagram normalized by the primitive mantle, trace element geochemistry data show that their mantle sources are enriched in certain elements concentrate d in the continental crust, such as Pb, K, Rb and Ba, and slightly depleted in s ome HFSE such as Hf, P and Nb. Pb-Sr-Nd isotopic compositions further suggest the mantle is the mixture of depleted mantle and enriched one . T his interaction can explain the trace element characteristics of basaltic magmas , i.e., the enrichment of Pb and the depletion of Hf, P and Nb in basalts can be interpreted by the blending of the eclogites in DOB (enriched in Pb and deplete d in Hf, P and Nd) with the East China depleted mantle (As compared to the primi tive mantle, it is neither enriched in Pb nor depleted in Hf, P and Nb). It is a lso indicated that the eclogites in the Dabie orogenic belt were surely derived from the exhumation materials, which had delaminated into the deep-seated mantl e. Moreover, the process subsequently resulted in compositional variation of the mantle (especially in trace elements and isotopes), as revealed by the late man tle-derived basalts in the Dabie orogenic belt.

Constant and steplike behavior of the cross-section dimension ofSi quantum wires and quantum confinement effect inporous silicon formation

Silicon is an indirect semiconductor with a band-gap of 1.11 eV.Therefore,there isno optical recombination in bulk silicon in the visible region.Porous silicon(PS)preparedby anodic oxidation at constant current density in HF solution has aroused great researchinterest since Canham reported its strong visible photoluminescence(PL)at roomtemperature in 1990.Many experimental results indicated that PL of PS is mainlyattributed to the quantum confinement effect(QCE)in PS layer.Unlike the lay-

Self-assembling bacterial pores as components of nanobiosensors for the detection of single peptide molecules

Nano-sized bacterial pores were inserted into a lipid membrane as a nanobiosensor for the detection of single peptide molecules. Due to the intrinsic properties of single-channel conductance, the transit of individual molecules through the pore can be studied. The analysis of both the blockage current and duration is able to provide specific structural information and allows the detection of specific peptides in bulk mixtures.

Investigations on the two photoluminescence peaks feature and the light-emitting mechanism of porous silicor

Interest in porous silicon (PS) has greatly increased since the discovery of its visible light emission. Understanding of the visible photoluminescence (PL) spectra of PS is one of the most important aspects of researches on porous silicon. Early studies focused on the observation of a single peak in the PL spectra. Recently, multiple peak features in the low-temperature PL spectra of PS samples as-prepared or dry-oxidized were reported.In this note, we report the observation of two PL peaks at room temperature on treated PS samples. We will discuss how the treatment conditions affect the characteristics of

Study on Structure and Biological Activities of Novel Triazole Compounds Containing 1,3-Dithiolane Ring

Seven novel triazole compounds containing 1,3-dithiolane groups were synthesized according to the biological isosterism. Their structures were confirmed by means of elemental analysis, MS, ^1H NMR, IR and X-ray crystallography. The results of preliminary biological tests showed that all of these compounds possess some antifungal and plant growth regulatory activities.