Crystal structure and Hirshfeld surface analysis of the chalcone derivative (2)-3-[4-(di-phenyl-amino)phen-yl]-1-[4-(prop-1-yn-2-yl-oxy)phen-yl]prop-2-en-1-one.

In the crystal structure of the title chalcone derivative, CHNO, the mol-ecule adopts an s- conformation with respect to the C=O and C=C bonds. The tri-phenyl-amine moiety has a propeller-type shape, with dihedral angles between the mean planes of pairs of phenyl rings of 72.1 (6), 69.

The crystal structures determination and Hirshfeld surface analysis of -(4-bromo-3-meth-oxy-phen-yl)- and -{[3-bromo-1-(phenyl-sulfon-yl)-1-indol-2-yl]meth-yl}- derivatives of -{[3-bromo-1-(phenylsulfon-yl)-1-indol-2-yl]meth-yl}benzene-sulfonamide.

Two new phenyl-sulfonyl-indole derivatives, namely, -{[3-bromo-1-(phenyl-sulfon-yl)-1-indol-2-yl]meth-yl}--(4-bromo-3-meth-oxy-phen-yl)benzene-sulfonamide, CHBrNOS, (), and ,-bis-{[3-bromo-1-(phenyl-sulfon-yl)-1-indol-2-yl]meth-yl}benzene-sulfonamide, CHBrNOS, (), reveal the impact of intra-molecular π-π inter-actions of the indole moieties as a factor not only governing the conformation of ,-bis-(1-indol-2-yl)meth-yl)amines, but also significantly influencing the crystal patterns. For , the crystal packing is dominated by C-H⋯π and π-π bonding, with a particular significance of mutual indole-indole inter-actions. In the case of , the mol-ecules adopt short intra-molecular π-π inter-actions between two nearly parallel indole ring systems [with the centroids of their pyrrole rings separated by 3.

Salicylidene-based dual-responsive 'turn on' fluorometric chemosensors for the selective detection of Zn, Al and F ions: theoretical investigation and applications in the live cell imaging of zebrafish larvae and molecular logic gate operation.

Four salicylidene-based dual-responsive chemosensors 1,5-bis(5-bromosalicylaldehyde)carbohydrazone (R1), 1,5-bis(5-bromosalicylaldehyde)thiocarbohydrazone (R2), 1,5-bis(3-ethoxysalicylaldehyde)carbohydrazone (R3) and 1,5-bis(3-ethoxysalicylaldehyde)thiocarbohydrazone (R4) were synthesized and characterized. The molecular structures of R1 and R3 were confirmed by single crystal X-ray diffraction technique, which crystallized in the orthorhombic and monoclinic 2/ space groups, respectively. The chemosensor molecules were investigated for their recognition properties against the selected cations (K, Ca, Mn, Co, Ni, Cu, Zn, Fe and Al) and anions (F, Cl, Br, I, HSO, HPO, ClO, N and NO) by colorimetry, absorption spectroscopy, fluorescence spectroscopy, H NMR spectroscopy and theoretical studies.

Crystal structure determination and Hirshfeld surface analysis of -acetyl--3-meth-oxy-phenyl and -(2,5-di-meth-oxy-phen-yl)--phenyl-sulfonyl derivatives of -[1-(phenyl-sulfon-yl)-1-indol-2-yl]methanamine.

Two new [1-(phenyl-sulfon-yl)-1-indol-2-yl]methanamine derivatives, namely, -(3-meth-oxy-phen-yl)--{[1-(phenyl-sulfon-yl)-1-indol-2-yl]meth-yl}acetamide, CHNOS, (), and -(2,5-di-meth-oxy-phen-yl)--{[1-(phenyl-sulfon-yl)-1-indol-2-yl]meth-yl}benzene-sulfonamide, CHNOS, (), reveal a nearly orthogonal orientation of their indole ring systems and sulfonyl-bound phenyl rings. The sulfonyl moieties adopt the anti-periplanar conformation. For both compounds, the crystal packing is dominated by C-H⋯O bonding [C⋯O = 3.

The crystal structures and Hirshfeld surface analysis of three new bromo-substituted 3-methyl-1-(phenyl-sulfon-yl)-1-indole derivatives.

Three new 1-indole derivatives, namely, 2-(bromo-meth-yl)-3-methyl-1-(phenyl-sulfon-yl)-1-indole, CHBrNOS, (), 2-[()-2-(2-bromo-5-meth-oxy-phen-yl)ethen-yl]-3-methyl-1-(phenyl-sulfon-yl)-1-indole, CHBrNOS, (), and 2-[()-2-(2-bromo-phen-yl)ethen-yl]-3-methyl-1-(phenyl-sulfon-yl)-1-indole, CHBrNOS, (), exhibit nearly orthogonal orientations of their indole ring systems and sulfonyl-bound phenyl rings. Such conformations are favourable for inter-molecular bonding involving sets of slipped π-π inter-actions between the indole systems and mutual C-H⋯π hydrogen bonds, with the generation of two-dimensional monoperiodic patterns. The latter are found in all three structures, in the form of supra-molecular columns with every pair of successive mol-ecules related by inversion.