Self-Assembly of a Donor–Acceptor Nanotube. A Strategy To Create Bicontinuous Arrays
摘要:
The self-assembly of bolaamphiphile 1 into nanotubes containing a nanostructured electron donor/acceptor heterojunction is reported. In 10% MeOH/H2O, the tetraphenylporphyrin (TPP) and 1,4,5,8-naphthalenetetracarboxylic acid diimide chromophores engage in strong J-type pi-pi interactions within monolayer rings that further stack into the nanotube assemblies. In 10% MeOH/H2O at pH 1 or 11 or in pure MeOH, assembly is driven exclusively by the TPP ring, leading to the formation of nonspecific, unstructured aggregates. Steady-state, time-resolved fluorescence and femtosecond transient absorption spectroscopy revealed a strong dependence of the fluorescence decay and electron-transfer/charge-recombination time constants on the nature of the assemblies. These studies highlight the importance of local nanostructure in determining the photophysical properties of optoelectronic materials.
The impact of metal coordination on the assembly of bis(indolyl)methane-naphthalene-diimide amphiphiles
作者:Sinan Bayindir、Kwang Soo Lee、Nurullah Saracoglu、Jon R. Parquette
DOI:10.1039/d0dt02732d
日期:——
comprised of naphthalenediimide (NDI) and bis(indolyl)methane (BIM) chromophores were investigated as a function of pH and metal. As observed by TEM, SEM and AFM imaging, the self-assembly of NDI-BIM 1 produced irregular nanostructures at neutral pH in CH3CN–H2O (1 : 1); whereas, well-defined nanotubes were observed at pH 2. Conversely, Fmoc-protected, NDI-BIM 2 formed nanotubes at neutral pH and nonspecific
Self-Assembly of a Donor–Acceptor Nanotube. A Strategy To Create Bicontinuous Arrays
作者:Siyu Tu、Se Hye Kim、Jojo Joseph、David A. Modarelli、Jon R. Parquette
DOI:10.1021/ja205868b
日期:2011.11.30
The self-assembly of bolaamphiphile 1 into nanotubes containing a nanostructured electron donor/acceptor heterojunction is reported. In 10% MeOH/H2O, the tetraphenylporphyrin (TPP) and 1,4,5,8-naphthalenetetracarboxylic acid diimide chromophores engage in strong J-type pi-pi interactions within monolayer rings that further stack into the nanotube assemblies. In 10% MeOH/H2O at pH 1 or 11 or in pure MeOH, assembly is driven exclusively by the TPP ring, leading to the formation of nonspecific, unstructured aggregates. Steady-state, time-resolved fluorescence and femtosecond transient absorption spectroscopy revealed a strong dependence of the fluorescence decay and electron-transfer/charge-recombination time constants on the nature of the assemblies. These studies highlight the importance of local nanostructure in determining the photophysical properties of optoelectronic materials.