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Abstract: The self-assembly of a novel series of donor–acceptor interaction-driven artificial hetero-duplexes in organic media has been described. Four linear compounds 1a–1d , bearing two to five electron rich 1,5-dioxynaphthalene units connected by the tetra(ethylene glycol) linker, respectively, have been prepared and used as donors, while eight compounds 2a–2d , 13–16 , bearing one to four electron deficient pyromellitic diimide, 1,4,5,8-naphthalene-tetracarboxydiimide, or perylene-3,4,9,10-tetracarboxydiimide units, respectively, have been used as acceptors. The structure of the hetero-duplexes has been characterized by the 1H NMR, UV–vis spectroscopy and vapor pressure osmometry. It is revealed that the binding stability of the duplexes vary greatly, depending on the length and structure of the monomers and also the solvent, and hetero-duplex 1d·2d displays a maximum association constant of ca. 1.0×104 M−1 in chloroform. [Copyright &y& Elsevier]

A highly selective photoelectrochemical sensor was fabricated for the detection of Cu 2 + ions based on the Cu + catalyzed click reaction. Firstly, 11-Azido-3,6,9-trioxaundecan-1-amine was immobilized on the CdS modified ITO electrode by classic 1-Ethyl-3-[3-dimethylaminopropyl]carbodiimide reaction, then the propargyl-functionalized Au NPs were binding to electrode through the cycloaddition reaction between azides and alkynes, which catalyzed by Cu + (acquired from the reduction of Cu 2 + by ascorbic acid), making the Au NPs close to the CdS QDs. Upon light irradiation, energy transfer between the CdS QDs and Au NPs would lead to the decrease of photocurrent. Under optimized condition, the percentage of photocurrent decrement was linearly proportional to the concentration of Cu 2 + ions, ranging from 1.0 × 10 − 9 to 1.0 × 10 − 6 M, with a detection limit of 2.0 × 10 − 10 M, the novel strategy could provide a sensitive and selective platform for Cu 2 + detection. [ABSTRACT FROM AUTHOR]

A novel copper catalyzed domino three-component decarboxylative coupling and cyclization reaction using cyclic α-amino acids has been developed. This reaction provides an efficient and atom economic approach to 2-(2-indolyl)pyrrolidine, and 2-(1,1-dioxido-2 H -benzo[ e ][1,2]thiazin-3-yl)pyrrolidine derivatives. [ABSTRACT FROM AUTHOR]

Five new coordination polymers, namely [Zn 4 (L) 2 (5-HIA) 2 ] n ·nH 2 O ( 1 ), [Cd 2 L(IPA) 2 ] n ·2 n H 2 O ( 2 ), [Zn 6 L 3 (TPA)] n ·4 n H 2 O ( 3 ), [Zn 8 L 4 (TMA) 8 ] n · n H 2 O ( 4 ) and [Co 2 L(TMA) 2 ] n ·3 n H 2 O ( 5 ), have been hydrothermally prepared based on a tetrahedral linker, tetrakis(3-pyridyloxymethylene) methane (L), and different carboxylates (5-HIA = 5-hydroxyisophthalic acid, IA = isophthalic acid, TPA = terephthalic acid and TMA = trimesic acid). Complex 1 and 5 exhibit that L is sandwiched between two 2-D sheets, while 2 features a 3D structure with a (ZnL) n helix. Complex 3 exhibits a threefold interpenetration network. In 4 , a 2D sheet is generated by intermolecular hydrogen bonds and is further linked into a 3D network. The thermal stability and photoluminescent properties of these polymers were investigated. [ABSTRACT FROM AUTHOR]

This novel copper-catalyzed coupling of 2-ethynylanilines, cyclic amino acids, and aromatic aldehydes provides a facile approach to a wide variety of indolyl pyrrolidines. [ABSTRACT FROM AUTHOR]