4-[3-(Chloro­meth­yl)-1,2,4-oxadiazol-5-yl]pyridine. Corrigendum

Corrigendum to Acta Cryst. (2007), E63, o4654

Study the Heavy Molecular States in Quark Model with Meson Exchange Interaction

Some charmonium-like resonances such as X(3872) can be interpreted as possible $D^{(*)}D^{(*)}$ molecular states. Within the quark model, we study the structure of such molecular states and the similar $B^{(*)}B^{(*)}$ molecular states by taking into account of the light meson exchange ($\pi$, $\eta$, $\rho$, $\omega$ and $\sigma$) between two light quarks from different mesons

2-[3,4-Dibut­oxy-5-(5-phenyl-1,3,4-oxadiazol-2-yl)-2-thien­yl]-5-phenyl-1,3,4-oxadiazole

In the title compound, C28H28N4O4S, the dihedral angles between the central thio­phene ring and its pendant oxadiazole rings are 1.2 (3) and 9.8 (3)°. The dihedral angles between the oxadiazole and phenyl rings are 2.9 (3) and 1.8 (3)°. Some short intra­molecular C—H⋯O contacts occur

Ethyl 5-formyl-2,4-dimethyl-1H-pyrrole-3-carboxyl­ate

The molecule of the title compound, C10H13NO3, is approximately planar. A network of N—H⋯O and weak C—H⋯O hydrogen bonds helps to consolidate the crystal structure

2-Chloro-N-(4-fluoro­phen­yl)acetamide

In the title compound, C8H7ClFNO, an intra­molecular C—H⋯O hydrogen bond forms a six-membered ring. In the crystal structure, mol­ecules are linked by inter­molecular N—H⋯O hydrogen bonds, forming infinite chains along the c axis

Diffraction-Free Bloch Surface Waves

In this letter, we demonstrate a novel diffraction-free Bloch surface wave (DF-BSW) sustained on all-dielectric multilayers that does not diffract after being passed through three obstacles or across a single mode fiber. It can propagate in a straight line for distances longer than 110 {\mu}m at a wavelength of 633 nm and could be applied as an in-plane optical virtual probe, both in air and in an aqueous environment. The ability to be used in water, its long diffraction-free distance, and its tolerance to multiple obstacles make this DF-BSW ideal for certain applications in areas such as the biological sciences, where many measurements are made on glass surfaces or for which an aqueous environment is required, and for high-speed interconnections between chips, where low loss is necessary. Specifically, the DF-BSW on the dielectric multilayer can be used to develop novel flow cytometry that is based on the surface wave, but not the free space beam, to detect the surface-bound targets

1-Methyl-1H-indazole-3-carboxylic acid

The asymmetric unit of the title compound, C9H8N2O2, contains two mol­ecules. In the crystal structure, both mol­ecules form inversion dimers via pairs of O—H⋯O hydrogen bonds, and a C—H⋯O inter­ation is also seen