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Presented herein are two luminescent magnesium coordination polymers (Mg-CPs), namely [Mg2(H2O)2(2-NDC)4(1,10-phen)2] ( 1) and [Mg2(H2O)(1,4-NDC)2(1,10-phen)] ( 2), in which 2-NDCH=2-naphthalenecarboxylic acid, 1,4-NDCH2=1,4-naphthalene dicarboxylic acid, and 1,10-phen=1,10-phenanthroline. Based on the mixed ligands, the title compounds exhibit linker-based photoluminescence (PL) properties thanks to the unique configuration of the Mg2+ ions. The two compounds show interesting dual emission on excitation of the different luminophores of the mixed linkers. In particular, the emissions of compound 2 could be tuned from green to yellow simply by varying the excitation energies. Furthermore, 2 could be excited by using a commercial λ=450 nm blue LED chip to generate white-light emission, which allows the fabrication of a white-light-emitting diode (WLED) with 20 lm W−1 luminous efficacy. This work may provide a new method for designing tunable PL CPs by using the low-cost and abundant magnesium ion. [ABSTRACT FROM AUTHOR]

A mild, convenient, and step-economical intramolecular aminotrifluoromethylation of unactivated alkenes with a variety of electronically distinct, nitrogen-based nucleophiles in the presence of a simple copper salt catalyst, in the absence of extra ligands, is described. Many different nitrogen- based nucleophiles (e.g., basic primary aliphatic and aromatic amines, sulfonamides, carbamates, and ureas) can be employed in this new aminotrifluoromethylation reaction. The aminotrifluoromethylation process allows straightforward access to diversely substituted CF3-containing pyrrolidines or indolines, in good to excellent yields, through a direct difunctionalization strategy from the respective acyclic starting materials. Mechanistic studies were conducted and a plausible mechanism was proposed. [ABSTRACT FROM AUTHOR]