Construction of microbelts through the coassembly of a disclike molecule and primary alkyl ammoniums: a noncovalent strategy to mimic covalently bonded pi-core alkyl chain structure.
In this letter, we report the fabrication of microbelts through the coassembly of hexa-2-pyridyl-hexaazatriphenylen (HPHAT), a disklike pi-conjugated molecule, with primary alkyl ammonium triflate. The strategy is first to construct hydrogen-bonded complexes between HPHAT and primary alkyl ammoniums to mimic covalently bonded pi-core alkyl chain structures, and then the complexes self-assemble into microbelts driven by pi-pi stacking in the pi core and van der Waals interactions between the peripheral alkyl chains. The morphology of as-prepared microbelts has been characterized with scanning electron microscopy (SEM), optical microscopy, polarizing microscopy, and transmission electron microscopy (TEM). Spectroscopic and crystallographic investigations were also carried out to reveal the formation mechanism of the microbelts, through which a sequential self-assembly process has been proposed.
Xiao
Ze-Yun
ZY
State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China.
Zhao
Xin
X
Jiang
Xi-Kui
XK
Li
Zhan-Ting
ZT
D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008859:Microscopy, Polarization; D008956:Models, Chemical; D008962:Models, Theoretical; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*
D000644:Quaternary Ammonium Compounds