Abstract
Background: The design and preparation of functional pillar[n]arene-based supramolecular polymers have attracted extensive attention due to their wide range of applications.
Objective and Methods: Based on the synergistic effects of non-covalent interactions, including hydrogen bonds and host-guest interaction, an amphiphilic pillar[5]arene 1 with two terminated acid chains was designed, and its self-assembly properties were investigated by 1HNMR, TEM, SEM and UV-Vis.
Results: The pillar[5]arene 1 can form a self-inclusion complex, whose carboxyl groups are locked on the surface of the cavity at low concentration (<4.5 mM) in chloroform. Interestingly, when competitive guest dihaloalkanes, such as α,ω-diiodobutane (DIB), α,ω-dibromobutane (DBB) and α,ω-dichlorobutane (DCB), were added, supramolecular polymers were immediately obtained and precipitated. Their critical precipitation concentration (CPC) were calculated as 1 mM, 3 mM and 5 mM for DIB, DBB and DCB, respectively. Moreover, tuning the solvent, concentration and guests can reversibly control their polymerization.
Conclusion: This study provided an efficient method for the preparation of pillar[5]arene-based supramolecular polymers, which have the potential for the separation or purification of the dihaloalkanes.
Keywords: Pillar[5]arene, pseudo[2]rotaxane, supramolecular polymer, self-assembly, host-guest interaction, calculation.
Graphical Abstract
[http://dx.doi.org/10.1016/j.jcis.2016.11.056] [PMID: 27914336]
[http://dx.doi.org/10.2174/1381612823666161118145309] [PMID: 27855609]
[http://dx.doi.org/10.1016/j.tetlet.2018.02.028]
[http://dx.doi.org/10.1002/bip.10512] [PMID: 14648756]
[http://dx.doi.org/10.1021/acs.biomac.7b00671] [PMID: 28762718]
[http://dx.doi.org/10.1016/j.carbpol.2017.11.073] [PMID: 29254041]
[http://dx.doi.org/10.1002/adma.201605325] [PMID: 28370560]
[http://dx.doi.org/10.1016/j.actbio.2016.12.031] [PMID: 28003144]
[http://dx.doi.org/10.1039/C7MH00373K]
[http://dx.doi.org/10.1021/nn700341s] [PMID: 19206575]
[http://dx.doi.org/10.1021/acsami.7b13672] [PMID: 29077391]
[http://dx.doi.org/10.1021/acs.bioconjchem.6b00704] [PMID: 28035817]
[http://dx.doi.org/10.1021/ja1087979] [PMID: 21341793]
[http://dx.doi.org/10.1166/jnn.2016.12899]
[http://dx.doi.org/10.1016/j.poly.2015.12.008]
[http://dx.doi.org/10.1021/ja110846c] [PMID: 21473590]
[http://dx.doi.org/10.1039/C6QI00342G]
[http://dx.doi.org/10.1021/ja201170c] [PMID: 21671624]
[http://dx.doi.org/10.1002/anie.200600671] [PMID: 16865764]
[http://dx.doi.org/10.1039/C5PY01635E]
[http://dx.doi.org/10.1039/C6CE02369J]
[http://dx.doi.org/10.1021/ja711260m] [PMID: 18357989]
[http://dx.doi.org/10.1021/ar2003418] [PMID: 22551015]
[http://dx.doi.org/10.1021/acs.chemrev.5b00765] [PMID: 27337002]
[http://dx.doi.org/10.1039/C1CS15164A] [PMID: 21804967]
[http://dx.doi.org/10.1080/10610278.2017.1368512]
[http://dx.doi.org/10.1021/ar500022f] [PMID: 24635353]
[http://dx.doi.org/10.1002/anie.201006693] [PMID: 21290521]
[http://dx.doi.org/10.1021/ol2018938] [PMID: 21842840]
[http://dx.doi.org/10.1002/pola.28907]
[http://dx.doi.org/10.1021/acs.macromol.7b01010]
[http://dx.doi.org/10.1039/C7CC09315B] [PMID: 29334097]
[http://dx.doi.org/10.1021/jo301779y] [PMID: 22998632]
[http://dx.doi.org/10.1039/c1ob05871a] [PMID: 21870001]
[http://dx.doi.org/10.1021/ol500857w] [PMID: 24735090]
[http://dx.doi.org/10.1007/s10870-014-0550-2]
[http://dx.doi.org/10.1039/C2OB27044G] [PMID: 23160174]
[http://dx.doi.org/10.3390/molecules24152693] [PMID: 31344932]