The synthesis of star-shaped poly(<i>N</i>-isopropylacrylamide) with two zinc porphyrins as the core and end groups <i>via</i> ATRP and “CLICK” chemistry and a photocatalytic performance study

2022

Angew Chem Int Ed

The emergence of heterogeneous photocatalysis has facilitated redox reactions with high efficiency, without compromising the recyclability of the photocatalyst. Recently, stimuli‐responsive heterogeneous photocatalytic materials have emerged as a powerful synthetic tool, with simple and rapid recovery, as well as an enhanced dynamic control over reactions. Stimuli‐responsive polymers are often inexpensive and easy to produce. They can be switched from an active “on” state to an inert “off” state in response to external stimuli, allowing the production of photocatalyst with adaptability, recyclability, and orthogonal control on different chemical reactions. Despite this versatility, the application of artificial smart material in the field of heterogeneous photocatalysis has not yet been maximized. In this Minireview, we will examine the recent developments of this emerging class of stimuli‐responsive heterogeneous photocatalytic systems. We will discuss the synthesis route of appending photoactive components into different triggerable systems and, in particular, the controlled activation and recovery of the materials.

Section: Thermo‐responsive Polymer Photocatalytic Systemsmentioning

confidence: 99%

Temperature‐ and pH‐Responsive Polymeric Photocatalysts for Enhanced Control and Recovery

Landfester

2022

Angew Chem Int Ed

“…In addition to pure organic photocatalyst, several Znbased porphyrin temperature-sensitive photocatalytic systems [56][57][58] have been reported. Generally, the central porphyrin rings were easily functionalized with four initiators for the chain extension of NIPAM via atom transfer radical polymerization (ATRP), forming star-shaped polymers.…”

Section: Switchable Chain Solubilitymentioning

confidence: 99%

“…Moreover, the central porphyrin can also be further modified by different functional end groups, for example azide (N 3 ) and alkyne that can enable click reactions (Figure 2). [58] This method involved a two‐step reaction: the formation of NIPAM arms through ATRP and followed with the azide–yne click reaction between two photocatalytic units. However, the investigations of these photocatalytic materials have been limited to dye degradation reactions.…”

Section: Thermo‐responsive Polymer Photocatalytic Systemsmentioning

confidence: 99%

Temperature‐ and pH‐Responsive Polymeric Photocatalysts for Enhanced Control and Recovery

Landfester

2022

Angewandte Chemie

The emergence of heterogeneous photocatalysis has facilitated redox reactions with high efficiency, without compromising the recyclability of the photocatalyst. Recently, stimuli-responsive heterogeneous photocatalytic materials have emerged as a powerful synthetic tool, with simple and rapid recovery, as well as an enhanced dynamic control over reactions. Stimuli-responsive polymers are often inexpensive and easy to produce. They can be switched from an active "on" state to an inert "off" state in response to external stimuli, allowing the production of photocatalyst with adaptability, recyclability, and orthogonal control on different chemical reactions. Despite this versatility, the application of artificial smart material in the field of heterogeneous photocatalysis has not yet been maximized. In this Minireview, we will examine the recent developments of this emerging class of stimuli-responsive heterogeneous photocatalytic systems. We will discuss the synthesis route of appending photoactive components into different triggerable systems and, in particular, the controlled activation and recovery of the materials.

“…Further to organic photocatalysts, several examples of Zn-based porphyrin photocatalytic systems have utilized PNIPAM to produce temperature-responsive system. − The central porphyrin ring was easily modified at four points to enable chain extension of NIPAM by ATRP, creating star polymers. These photocatalytic materials displayed LCST behavior and could be used for temperature-dependent dye degradation.…”

Section: Responsive Polymer Systemsmentioning

confidence: 99%

Classical Polymers as Highly Tunable and Designable Heterogeneous Photocatalysts

Zhang

2021

ACS Catal.

Photocatalysis has emerged as a powerful synthetic tool to facilitate redox reactions with the target of creating stable and tunable photocatalytic materials. A class of recyclable photocatalytic materials has emerged through the combination of classical polymers with photocatalytic small molecules. Classical polymers are inexpensive and easy to produce. They can be used to create cheap, easily recyclable, and reusable materials. Moreover, these materials can be imparted with a broad range of functionality and physical features, allowing the materials properties to be easily tuned according to the application requirements. The inclusion of a photocatalytic moiety enables the material to be used for a vast number of visible-light-mediated photoredox reactions. A broad range of different classical polymer architectures have been reported over the last few decades. In this Review, we will summarize the recent development of this emerging class of metal-free and heterogeneous photocatalytic platform. We will particularly discuss the inclusion of photoactive components into different polymer structures by paying attention to the synthesis route, material properties, and photoactivity of the polymeric materials produced.