A Color‐Tunable Fluorescent Supramolecular Hyperbranched Polymer Constructed by Pillar[5]arene‐Based Host–Guest Recognition and Metal Ion Coordination Interaction

Abstract

Fluorescent supramolecular polymers are an important kind of smart material. In this work, a new fluorescent supramolecular hyperbranched polymer (FSHP) is constructed by orthogonal self-assembly: pillararene-based host-guest interaction and metal ion complexation interaction. The FSHP exhibits concentration-controllable fluorescence emissions. The photoluminescence spectra and light-emitting colors of FSHP can be effectively tuned by changing metal ion types or using mixed metal ions. The fluorescence quenching of FSHP solutions or FSHP-based films would occur when removing the metal ions from the backbone of FSHP. This study supplies a convenient approach toward the construction of structure-tunable fluorescent supramolecular materials with different colors.

Fabrication of a Dual‐Stimuli‐Responsive Supramolecular Micelle from a Pillar[5]arene‐Based Supramolecular Diblock Copolymer for Photodynamic Therapy

“…Zhu et al developed a novel supramolecular diblock copolymer based on host–guest interaction between cyclodextrins and adamantane . Pillar[ n ]arenes, as a new kind of macrocyclic hosts, have attracted great attention because of their symmetrical architecture and easy functionalization . Recently, pillar[ n ]arenes‐based supramolecular polymers are explored to fabricate stimuli responsive supramolecular systems, which can be efficiently used to develop drug delivery systems, chemosensors, and cell‐like vesicles .…”

Self‐fluorescent polymers for bioimaging

“…Reversible addition-fragmentation chain transfer polymerization [20] Methacryloyl Atom transfer radical polymerization [21] Styryl Free radical polymerization [22] Azide Copper-catalyzed azide-alkyne cycloaddition [23] Amino Ring-opening polymerization…”

“…[20,23,29,30] Similarly, HPS-and DSA-containing fluorescent dyes and conventional fluorescent dyes, such as Rhodamine derivatives with different reactive groups, are also synthesized to produce self-fluorescent polymers. [21,22] Table 1 summarizes some of the fluorescent dyes available for different polymerization routes.…”

“…[18,19] Based on these fluorescent dyes, selffluorescent polymers can be conveniently produced via their integration into polymer main chain, side chain, or star topology. [20][21][22][23][24] The second integration method is actually an unconventional route to produce self-fluorescent polymers due to the construction of heteroatomcontaining chromophores with unique fluorescence emission properties. Based on these considerations, several nitrogen-containing poly(amine-esters), siliconcontaining polysiloxane, and oxygen-containing polyester have been developed, which emit blue fluorescence for bioimaging.…”

Counter Cation Dependent and Stimuli Responsive Supramolecular Polymers Constructed by Calix[4]pyrrole Based Host–Guest Interactions

“…Numerous types of forces, such as hydrogen bonding, metal‐ligand coordination, and hydrophobic and donor–acceptor interactions are employed to engineer supramolecular polymers . Among these, host–guest interactions have been widely utilized to construct supramolecular polymers by using various macrocyclic hosts such as crown ethers, calixarenes, cyclodextrins, cryptands and pillar[5]arenes . In this context, a number of guest molecules (e.g., adamantane, anthracene, charged‐naphthalenes, ‐amines, ‐imidazoles, and viologens) have been used as neutral or positively charged guest species when they incorporated into the structures of above mentioned host molecules.…”