Generation and solid state characterization of tetrapyridinium perchlorate salts derived from tetrapyridyl tetraphenylethylenes

作者：Kapadia Pradeep P; Magnus Mackenzie A; Swenson Dale C; Pigge F Christopher^*

来源：Journal of Molecular Structure, 2011, 1003(1-3): 82-86.

DOI：10.1016/j.molstruc.2011.07.030

• Tetraarylethylene
• Crystal structure
• Helical packing
• Pyridinium

Two tetraarylethylene derivatives symmetrically functionalized at the 4, 4', 4 '', and 4''' positions with either 4-pyridyl or 3-pyridyl groups were converted to their corresponding tetrapyridinium perchlorate salts upon exposure to Fe(ClO(4))(3)center dot xH(2)O. These tetra-perchlorates were isolated as single crystals and their structures were determined by X-ray diffractometry. In both cases extensive hydrogen bonding networks were observed involving pyridinium N-H groups, perchlorate anions, and included water molecules. Additionally, both structures feature hydrophobic crystalline regions formed from stacking of tetraarylethylene cations in helical fashion. Polar pyridinium N-H groups are directed outward from these stacks into hydrophilic crystalline regions containing perchlorate anions and water molecules of hydration. Information obtained regarding the solid state structures of these functionalized tetraarylethylene derivatives should prove useful in design of more elaborate supramolecular architectures.

• 出版日期2011-9-28