When dithiafulvenyl functionalized π-conjugated oligomers meet fullerenes and single-walled carbon nanotubes
作者:Karimulla Mulla、Yuming Zhao
DOI:10.1039/c3tc30626g
日期:——
aldehyde-endcapped oligomer products. This reaction provides an appealing approach for efficient fluorescence turn-on sensing of fullerenes. Furthermore, the DTF-attached oligomers showed strong noncovalent interactions with single-walledcarbonnanotubes (SWNTs) to form soluble supramolecular assemblies in certain chlorinated organic solvents such as methylene chloride and chloroform. The dispersion of SWNTs effected
Phenylethynyl-bridged dipyrrin "dimers" have performed ZnII complexation to give coordination polymers, which provided the fluorescent colloidal spherical objects in solution as well as on the substrate according to the spacer units. Using a mixture of THF and water, unique morphologies, such as bell-shaped and "golf ball"-like architectures, were observed.
A set of bis(phenylethynyl)phenylene-bridged diporphyrins 1â3
has been prepared by the acid-catalysed double condensation reaction of
bis(4-formylphenylethynyl)benzene 8 and 9, and
3,5-di-tert-butylbenzaldehyde 11 with
bis(3-hexyl-4-methylpyrrol-2-yl)methane 12 or the
Pd0-catalysed coupling reaction of acetylene-substituted
porphyrin 14 with 1,4-diiodobenzene. Intramolecular singlet excitation
energy transfer in Znâfree base hybrid diporphyrins 1â3(ZH)
has been studied by picosecond time-resolved fluorescence spectroscopy.
The determined kEN values are in the order
of 1(ZH) > 2(ZH) â 3(ZH). The energy transfer
mechanism is discussed in terms of varying contribution of through-space
and through-bond interactions.