Bis[benzyl N′-(3-phenyl­prop-2-enyl­idene)hydrazinecarbodithio­ato-κ2 N′,S]zinc(II)

In the title ZnII complex, [Zn(C17H15N2S2)2], the ZnII atom lies on a twofold rotation axis. It exists in a tetra­hedral geometry, chelated by two deprotonated Schiff base ligands. The dihedral angle between each ligand is 71.48 (8)°. Mol­ecules are connected by weak C—H⋯S inter­molecular inter­actions into chains along the c axis. The crystal structure is further stabilized by C—H⋯π inter­actions involving the phenyl ring of the 3-phenyl­prop-2-enyl­idene unit

Benzyl 3-[(E,E)-3-phenyl­prop-2-enyl­idene]dithio­carbazate

The title compound, C17H16N2S2, a dithio­carbazate derivative, adopts an EE configuration with respect to the C=C and C=N double bonds of the propenyl­idine group. The 3-phenyl­prop-2-enyl­idene and dithio­carbazate fragments lie essentially in the same plane, with a maximum deviation from that plane of 0.074 (2) Å, while the dihedral angle between the 3-phenyl­prop-2-enyl­idene and the benzyl group is 77.78 (7)°. In the crystal structure, mol­ecules are linked by an N—H⋯S hydrogen bond and a weak C—H⋯S inter­action involving the terminal thione S atom, forming dimers that are arranged into sheets parallel to the bc plane. The crystal structure is also stabilized by C—H⋯π inter­actions

Bis[benzyl N′-(3-phenyl­prop-2-enyl­idene)hydrazinecarbodithio­ato-κ2 N′,S]copper(II)

The CuII atom of the title complex, [Cu(C17H15N2S2)2], lies on a twofold rotation axis, and is in a distorted tetra­hedral geometry with the two bidentate N2S2 Schiff bases. In the crystal structure, the mol­ecules are inter­connected into chains along the c axis by weak C—H⋯S inter­molecular inter­actions. The crystal packing is further stabilized by C—H⋯π inter­actions

(E)-4-Octyloxybenzaldehyde thio­semicarbazone

In the title compound, C16H25N3OS, the thio­semicarbazone group adopts an E configuration with respect to the C=N bond and is almost coplanar with the benzene ring, forming a dihedral angle of 9.3 (1)°. In the crystal packing, the mol­ecules lie along the a axis in an anti­parallel arrangement and are held in place by van der Waals inter­actions. As a consequence, there is relatively low anisotropic thermal motion in the terminal atoms of the n-octyl chain

2,4-Dimethoxy­benzaldehyde azine

The title mol­ecule, C18H20N2O4, is located on a crystallographic centre of symmetry. The meth­oxy groups are coplanar with the benzene ring [interplanar angles of 14.4 (2) and 3.1 (3)°], indicating a conjugation effect

Fatigue crack growth retardation in an HSLA steel in benign environments

The crack growth and closure were examined for fatigue loading of an HSLA steel in non-corroding media. R and ΔK dependent significant crack growth retardation was observed in NaOH. Presence of a passive film at high R and self repair of the film and formation of an additional oxide layer at low R could explain the retardation

Methyl 3-[(E,E)-3-phenyl­prop-2-enyl­idene]dithio­carbazate

In the title compound, C11H12N2S2, the dithio­carbazate group adopts an EE configuration with respect to the C=C and C=N bonds of the propenyl­idene group. The atoms of the propenyl­idene and dithio­carbazate unit are essentially co-planar, with a maximum deviation of 0.058 (1) Å; the phenyl ring forms a dihedral angle of 18.3 (1)° with this fragment. In the crystal, mol­ecules form inversion dimers via pairs of N—H⋯S hydrogen bonds involving the terminal S atom

Effect of plasma ion implantation on the hydrogen embrittlement of Cu strengthened HSLA-100 steel

The effect of low dosage plasma ion implantation on hydrogen embrittlement was studied for an HSLA steel using notched tensile samples. The plasma treatment caused an enhancement in the linear strain to failure under embrittling conditions. This was however not reflected in the fracture surfaces of the treated samples which had similar fractographic features as those of untreated samples. The plasma treatment delayed the process of embrittlement without causing any alteration in the basic mechanism of embrittlement. This was due to introduction of residual compressive stresses as well as reduction in the hydrogen permeation flux. Implantation in pure nitrogen seemed most beneficial while implantation in pure argon caused very little improvement

Magnetic coupling of porphyrin molecules through graphene

Graphene is expected to complement todays Si-based information technology. In particular, magnetic molecules in contact with graphene constitute a tantalizing approach towards organic spin electronics because of the reduced conductivity mismatch at the interface. In such a system a bit is represented by a single molecular magnetic moment, which must be stabilized against thermal fluctuations. Here, we show in a combined experimental and theoretical study that the moments of paramagnetic Co-octaethylporphyrin (CoOEP) molecules on graphene can be aligned by a remarkable antiferromagnetic coupling to a Ni substrate underneath the graphene. This coupling is mediated via the \pi\ electronic system of graphene, while no covalent bonds between the molecule and the substrate are established.Comment: 27 pages, 12 figures, Accepted at Adv. Mate

Low cycle fatigue and cyclic plasticity bahaviour of Indian PHWR / AHWR primary piping materials

The integrity assessment of the primary piping components needs to be demonstrated under normal operation cyclic loadings as well as under complex cycling loadings of extreme magnitude as may come during a severe earthquake event. In order to understand material's cyclic plasticity and fatigue ratcheting behaviour, systematic experimental and analytical investigations have been carried out on specimens of SA333Gr.6 carbon steel and SS304LN stainless steel. The materials specification of SA333Gr.6 is same as used in Primary Heat transport (PHT) piping of Pressurized Heavy Water Reactors (PHWRs) and materials specification of SS304LN steel is same as proposed for Indian Advanced Heavy Water Recactor (AHWRs) Main Heat Transport (MHT) piping. The test program included the properties and cyclic plasticity behaviour. The results of these tests have been investigated in detals using few popular finite element cyclic plasticity models to understand and quantify the materials' cyclic plasticity behaviour. The studies revealed the need to modify the Chaboche model to simulate the LCF/cyclic plasticity and ratcheting under different stress/strain amplitude loading conditions. On accounting for modification, the Chaboche model nicely predicted the LCF and ratcheting response for all the tests. The tests, finite element analyses results and their interpretations have been presented in this paper