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In the title compound, C(15)H(12)OS, the cyclo-hexene ring has a twisted boat conformation with the C atom between the ketone and methyl-ene atom and this methyl-ene C atom lying 0.280 (3) and 0.760 (3) Å, respectively, from the plane through the remaining four atoms (r.m.s. deviation = 0.004 Å). The dihedral angle between the benzene and thio-phene rings [21.64 (9)°] indicates an overall twist in the mol-ecule. The thio-phene S and ketone O atoms are anti, an orientation that allows the close approach of these atoms [3.3116 (17) Å] in the crystal structure and which leads to the formation of helical supra-molecular chains along the c axis.
The Cover Feature shows UiO-66 and its different roles in catalysis, either as acid, basic, or bifunctional catalyst or as support. In their Review, A. Dhakshinamoorthy et al. describe that UiO-66 has become one of the most widely used metal-organic frameworks in heterogeneous catalysis as a result of its remarkable stability under solvothermal conditions. Furthermore, current understanding on the synthesis of this material using modulators has also allowed a considerable control on the crystallinity of this material and on the incorporation of structural defects. The present Review covers the use of UiO-66 as solid catalyst to promote organic reactions in the liquid phase, classified according to the role of UiO-66 as active component or as support of nanoparticles embedded within the internal pores. More information can be found in the Review by A. Dhakshinamoorthy et al. on page 899 in Issue 3, 2019 (DOI: 10.1002/cctc.201801452).
In the title compound, C(17)H(17)BrN(2)O, the N-containing ring adopts an envelope conformation with the C atom carrying the phenyl ring displaced by -0.531 (9) Å from the plane defined by the remaining five atoms (r.m.s. deviation = 0.0099 Å). The benzene ring is almost orthogonal to the ring to which it is attached, the C(CN)-C-C(Ph)-C(Ph) torsion angle being -101.3 (7)°. The cyclo-hexene ring is disordered over two conformations in a statistical ratio. The most prominent inter-actions in the crystal are pairs of N-H⋯O hydrogen bonds between inversion-related mol-ecules. The resulting dimers are linked into a three-dimensional architecture by C-H⋯N, C-H⋯Br and C-H⋯π inter-actions.
Abstract In this research work, three new derivatives of ( E )‐ N ʹ‐(methoxybenzylidene)‐4‐methylbenzenesulfonohydrazide (MBMBSH) were prepared by means of a condensation technique from the methoxybenzaldehyde and 4‐methyl‐benzenesulphonylhydrazine in good yields, which were crystallized in EtOH and MeOH. MBMBSH ligands were examined through spectroscopic progression ( 1 H‐NMR, 13 C‐NMR, FTIR, and UV‐Visible). Structures of the MBMBSH lignads confirmed with a single crystal X‐ray diffraction scheme (SCXRDS). MBMBSH derivatives used for the imminent recognition of heavy metal ion (thallium) based on a reliable current‐voltage (I−V) procedure. Smooth GCE was covered with a light layer of MBMBSH molecules and consequently modified toward a sensitive and selective thallium ion sensor using conducting polymer matrix, Nafion (NF). Analytical parameters such as sensitivity, LOQ, and LOD of GCE/4‐MBMBSH/NF as a sensor were calculated from the calibration plot and found as 622.9 pAμM −1 cm −2 , 250.0 mM, and 75.0 pM respectively. This prospective sensor (GCE/4‐MBMBSH/NF) applied to the careful determination of thallium ion in spiked environmental samples and found satisfactory result.
Abstract Biopolymers are considered as a favorable group of substances with a broad array of applications, of which biomedical field stands out. The interesting features of biopolymers such as low‐cost, non‐cytotoxicity, hydrophilicity, biodegradation and biocompatibility make them promising and excellent feedstock to be used in implantable devices. The bounteous reactive functional groups in the backbone structure of polysaccharides and its derivatives could be utilized to develop hydrogels, nano‐composite and 3D scaffolds with appealing structures and desired features, leading to promising research attention towards biomedical fields. The present review describes the foremost properties as well as potential of different biopolymers, and their composites for application in implantable biomedical systems. This work may introduce readers about the comprehension of state‐of‐the‐art advances, real present challenges along with the future anticipation of eco‐friendly and biomimetic techniques for the modification of biopolymeric materials to improve their biomedical applications.
