Self-Assembled Squares and Triangles by Simultaneous Hydrogen Bonding and Metal Coordination
摘要:
Through the combination of hydrogen bonding and metal-templated self-assembly, molecular squares and molecular triangles are observed in chloroform solution upon the complexation of hydrogen-bonded dimers of para-pyridyl-substituted 2-ureido-4-[1H]-pyrlmidinone (UPy) and an appropriate cis-substituted palladium complex. Molecular modeling studies and NMR analysis confirmed the presence of two distinct structures In solution: the tubular structure of the molecular square and propeller-bowl structure of the molecular triangle.