Construction of supramolecular hyperbranched polymers via the “tweezering directed self-assembly” strategy

Abstract

A bis-alkynylplatinum(II) terpyridine tweezer-alkynylgold(III) diphenylpyridine guest is shown to maintain the specific complexation in the presence of a B21C7-secondary ammonium salt recognition motif, which facilitates the formation of supramolecular hyperbranched polymers via the "tweezering directed self-assembly" strategy.

Supramolecular Polymers: Historical Development, Preparation, Characterization, and Functions

“…An interesting example comes from Wang et al, who constructed supramolecular hyperbranched polymers via a "tweezering-directed self-assembly" strategy, combining the inclusion mode from a crown ether−guest system and the tweezering mode from a tweezer-like molecule (Figure 40). 233 It was shown that a bis[alkynylplatium(II) terpyridine] tweezer, 66, could clamp an alkynylgold(III) diphenylpyridine guest, 67, leading to the formation of a supramolecular A 2 monomer terminated by a crown ether. After the addition of a B 3 secondary ammonium salt monomer, 68, a supramolecular hyperbranched polymer containing two kinds of binding modes was successfully constructed.…”

Supramolecular Gel Based on Crown‐Ether‐Appended Dynamic Covalent Macrocycles

“…A new type of dynamic covalent macrocycle with self-promoted supramolecular gelation behavior is developed. Under oxidative conditions, the dithiol compound containing a diamide alkyl linker with an odd number (7) of carbon chain and an appended crown ether shows a remarkable gelation ability in acetonitrile, without any template molecules. Due to the existence of crown ethers and disulfide bonds, the obtained gel shows a multiple stimuliresponsiveness behavior.…”

“…Therefore, the integration of selective molecular recognition units into the gelator molecules or their fibrous structures provides abundant opportunities to create specific responses or to develop multiple stimuli‐responsiveness, self‐healing, and shape‐memory . To date, various non‐covalent recognition interactions have been employed to build these fascinating soft materials, including hydrogen bonding, π–π stacking, van der Waals, coordination, electrostatic, and host–guest interactions . Macrocycles, including crown ethers, cyclodextrins, calixarenes, and cucurbiturils and pillararene have been widely utilized in the fabrication of supramolecular gels via host–guest interactions as driving force.…”

Co-solvent polarity tuned thermochromic nanotubes of cyclic dipeptide–polydiacetylene supramolecular system

“…The propensity of self-assembly extended to create hierarchical supramolecular polymer architectures has attracted increasing interest recently. [1][2][3][4][5][6] Self-assembled polymer architecture reects the integrated structural and functional features of monomer components. The self-assembly mechanism is an autonomous molecular organization with high geometric precision and it is strongly governed by the cooperative multiple non-covalent interactions.…”