Reaction of three phenolate ligands, viz. 2,4,6-tribromophenol (HL, where H stands for the phenolic proton), 2-nitrophenol (HL) and 2,4,6-trinitrophenol (HLO), with [Ru(PPh3)3Cl2] in a 2:1 molar ratio in the presence of a base gives complexes of type [Ru(PPh3)2(L)2] (L=L , L and L). The 2,4,6-tribromophenolate ligand (L) binds to ruthenium as a bidentate O,Br-donor, while the 2-nitrophenolate l...

A variety of natural and synthetic compounds are known to selfassemble to give transmembrane ion channels.1 Hydrogen-bonded macrocycles that can π-stack are a new type of channel motif.2 Thus, folate quartets stack to give ion channels in lipid bilayers.3 This folate assembly had a single-channel conductance of 10-20 picosiemens (pS), values consistent with the quartet’s 3 Å diameter. We found ...