Interactions of Microcrystals through Free Pyridyl Groups: Microcross and Chain-Arrayed Supercrystals of a Palladium(II) Complex

Chiral Pd6L8 Nanocube Pairs: Recognition of Chiral Amino Acids via Electrochemistry

The self-assembly of PdX₂ (X^- = ClO₄^- and PF₆^-) with C₃-symmetric l- and d-L [L = (2S,2'S,2″S)- and (2R,2'R,2″R)-[benzenetricarbonyltris(azanediyl)]tris(3-phenylpropane-2,1-diyl)triisonicotinate] produces the chiral nanocube pair [Pd₆(l-L)₈](X)₁₂ and [Pd₆(d-L)₈](X)₁₂ (X^- = ClO₄^- and PF₆^-, respectively) with an inner cavity of 12.3 × 12.3 × 12.3 ų. These chiral nanocubes are effective for the enantiorecognition of various chiral amino acids via the square-wave-voltammetry technique. In the present study, the site of enantiorecognition was confirmed by density functional theory calculated interactions between each nanocube and the chiral amino acids, and the calculated interactions were coincident with the shifts of the electrochemical oxidation potentials.

Stable suprachannels via a columnar cyclodimeric ensemble: exchange and matrix of various liquid guests in SCSC fashion

Self-assembly of ZnI₂ with di(isoquinolin-5-yl)isophthalate (L) as a new bidentate N-donor gives rise to discrete crown-shaped M₂L₂ cyclodimers, 3.5CH₃CN·0.7THF@[Zn₂I₄L₂]. These metallacyclodimers are composed of a characteristically eclipsed molecular array, resulting in the formation of unusual 10.0 × 15.1 Ų diameter suprachannels. The suprachannels adsorb/desorb various liquid molecules in a rigid manner, which enables scientists to solve the structures of various liquids. This columnar molecular ensemble is an efficient, tolerant, and reproducible suprachannel matrix for structural determination of general liquid compounds via easy single-crystal-to-single-crystal (SCSC) guest exchange without any desolvation process.