A New, Simple and Versatile Strategy for the Synthesis of Short Segments of Zigzag‐Type Carbon Nanotubes

Abstract

Short segments of zigzag single-walled carbon nanotubes (SWCNTs) were obtained from a calixarene scaffold by using a completely new, simple and expedited strategy that allowed fine-tuning of their diameters. This new approach also allows for functionalised short segments of zigzag SWCNTs to be obtained; a prerequisite towards their lengthening. These new SWCNT short segments/calixarene composites show interesting behaviour in solution. DFT analysis of these new compounds also suggests interesting photophysical behaviour. Along with the synthesis of various SWCNTs segments, this approach also constitutes a powerful tool for the construction of new, radially oriented π systems.

The synthesis and characterization of giant Calixarenes

“…This family of compounds was serendipitously discovered during the course of our investigations of the chemistry of p -(benzyloxy)calixarenes 11,27,31,49–52 . During an attempted synthesis of p -(benzyloxy)calix[6]arene, we refluxed a mixture of p -(benzyloxy)phenol, formaldehyde and RbOH (0.3 equivalent vs. phenol) in xylene.…”

“…The size range of these molecule, and their large number of functionalization sites make them organic nanoobjects (in the same way as dendrimers). Their interest is reinforced by the fact that both sides of p -(benzyloxy)phenol-derived giant calixarenes can be orthogonally functionalized upon hydrogenolysis of the benzyloxy groups 11,27,28 . We thus believe that giant calixarenes are opening a chapter in calixarenes history, and could also be interesting in some areas of nanosciences.…”

Conjugated Molecular Nanotubes

“…In this regard, as shown in Figure 7, synthesis of zigzag tubularenes is also possible by starting from the same precursor. Others [87] have reported on zigzag top‐rim connectivities similar to tubularene 17 using calixarenes (model compound 14 in Figure 10), which were reported without optical characterization, e. g., absorption or emission data. We obtained zigzag tubularenes using the same percursor used for 12 and 13 , pentyl resorcin[4]arene ( 10 ).…”

Domino Suzuki-Miyaura Cross-Coupling and Oxidative Condensation Reaction: An Approach Towards Synthesis of Phenanthridine and Its Analogues

“…1, 4), 24 antibacterial, anti-infectives, antprotozoal, antituberculosis, antitrypanosomiasis compounds 5,18,19,[25][26][27][28][29][30][31][32] . The phenanthridine ring systems are also used in lockable colorimetric fluorescence molecular switch, PET tracers, and in material science applications 4,15,22,[33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] .…”