Orthogonal functionalization of alternating polyesters: selective patterning of (AB)_n sequences

Abstract

A series of AB alternating polyesters are orthogonally patterned to install two different functionalities at regular intervals along the backbone and with high precision.

Recent Developments in Ring-Opening Copolymerization of Epoxides With CO2 and Cyclic Anhydrides for Biomedical Applications

“…Then the internal alkenes were quantitatively converted into carboxylic acids, amines, alkyl, and oligo-groups groups by thiol-ene reactions. These copolymers with both hydrophobic and hydrophilic blocks can be self-assembled into nanostructures in aqueous solution, which is expected to be used as antimicrobial agents and biodegradable drug delivery vehicles (Yi et al, 2019). Sanford et al used vanillin glycidyl ether (VGE) to directly introduce aldehyde functional group into the polymer chain by copolymerizing with PO and carbic anhydride (CPMA), using the [( F salph)Al(THF)][OTf]/[PPN] 2 [ADC] as a bifunctional catalytic system.…”

“…Besides, the coexistence of species with different degrees of functionality usually leads to broad or even multimodal molecular weight distributions, which also jeopardizes the chain-end fidelity. Moreover, excessive protonic functional groups may cause catalyst deactivation (Yi et al, 2019). Therefore, post-polymerization modification is an important means to realize multi-functionalities on ROCOP polymers, and the desired functional groups can be accurately connected to the polymer chain by different modification methods (Ntoukam et al, 2020).…”

“…FIGURE 11 | Selective synthesis of dual-functional alternating polyesters (using a combination of MA and VCHO as a representative example). Adapted with permission fromYi et al (2019). Copyright 2019 The Royal Society of Chemistry.…”

Aluminum Porphyrin Complex Mediated Auto-Tandem Catalysis for One-Pot Synthesis of Block Copolymers

“…[18][19][20][21] Due to their attractive phase separation behaviors, which promise a wide scope of applications, block copolymers incorporated with mechanistically incompatible monomers are of special research interest. [22][23][24][25][26][27] It can be envisioned that tandem catalysis permits exceptional efficiency in the synthesis of block copolymers from monomer mixtures by integrating different polymerization cycles in a one-pot process. However, most of the research efforts in such attempts are dependent on orthogonal tandem catalysis.…”

A “Polymer Template” Strategy for Carbonized Polymer Dots with Controllable Properties

“…[16][17][18] The groups of Yang [19] and Maser [20] also confirmed the crosslinkinge nhanced emission (CEE) effect that the hydrogen-bond-mediated supramolecular interactions from the FSGs controla nd facilitate the photoluminescence of PDs. Different types or degrees of carbonizedc ore and distinct interactions of FSG could induce unprecedented spatial organization, folding, and self-assembly, [21] changing the surfaces tate, core, and size of PDs, whicha re suspected of contributing to the photoluminescent tunability [22,23] including improvement in QY and shift in emission wavelength. [24,25] Moreover,t here are also reports [22,26] of regulating the emission wavelength by controlling the particle size [5,27] of PDs.…”