Metallophthalocyanine‐Based Conjugated Microporous Polymers as Highly Efficient Photosensitizers for Singlet Oxygen Generation

Abstract

Singlet oxygen ( 1 O 2 )isofgreat interest because of its potential applications in photodynamic therapy, photooxidation of toxic molecules,a nd photochemical synthesis.H erein, we report novel metallophthalocyanine (MPc) based conjugated microporous polymers (MPc-CMPs) as photosensitizers for the generation of 1 O 2 .T he rigid microporous structure efficiently improves the exposure of the majority of the MPc units to oxygen. The MPc-CMPs also exhibit an enhanced light-harvesting capability in the far-red region through their extended p-conjugation systems.T heir microporous structure and excellent absorption capability for long-wavelength photons result in the MPc-CMPs showing high efficiency for 1 O 2 generation upon irradiation with 700 nm light, as evident by using 1,3-diphenylisobenzofuran as an 1 O 2 trap.T hese results indicate that MPc-CMPs can be considered as promising photosensitizers for the generation of 1 O 2 .

Hydroxyl-Based Hyper-Cross-Linked Microporous Polymers and Their Excellent Performance for CO2 Capture

“…In order to stabilize the concentration of CO 2 in the atmosphere and prevent global warming, developing a viable CO 2 capture and storage (CCS) technology is very significant. , Microporous organic polymers (MOPs) combining high surface areas, tunable pore sizes, high chemical stability with diverse synthetic approaches have exhibited hopeful prospects in CO 2 uptake. − Various synthesis methodologies have been exploited for the synthesis of MOPs, according to the chemical structure and the type of reactions involved. MOPs can be divided into four categories: polymers of intrinsic microporosity (PIMs), , hyper-cross-linked polymers (HCPs), , covalent organic frameworks (COFs), , and conjugated microporous polymers (CMPs). , These microporous polymers have been widely used in CO 2 capture and exhibited excellent adsorption performance. However, the successful preparation of the most above MOPs requires noble metal catalysts and tedious synthesis procedures. − Thus, the high cost and rigorous conditions would limit the practical applications of most MOPs.…”

ALP-Activated Chemiluminescence PDT Nano-Platform for Liver Cancer-Specific Theranostics

“…Notably, the intensity gradually weakened along with time and reached minimum at 35 min, exhibiting an effective 1 O 2 generation. Additionally, we measured the quantum yield of 1 O 2 to be 0.37 by using a 1 O 2 probe diphenylbenzofuran (DPBF). , Also, the change in absorptionof DPBF along time was highly consistent with ABDA (Figure S15). Based on these results, we conclude that MSN@H 6 L@β-CD@AMPPD NPs are activated by ALP, and then the H 6 L molecules are excited by CL, thus producing a large amount of 1 O 2 .…”

Stable Organic Photosensitizer Nanoparticles with Absorption Peak beyond 800 Nanometers and High Reactive Oxygen Species Yield for Multimodality Phototheranostics

“…In PDT, a PS will generate a singlet excited state (S 1 ) upon photoexcitation first (Figure b). After intersystem crossing (ISC) to generate a triplet excited state (T 1 ), energy is further transferred to the surrounding O 2 to form ROSs such as 1 O 2 . , 1,3-Diphenylisobenzofuran (DPBF) is utilized as a probe to sense photoexcited 1 O 2 of BT photosensitizers . The absorption of DPBF at 415 nm would decline after sensing with 1 O 2 , indicating the ability of PDT performance.…”

“…56,57 1,3-Diphenylisobenzofuran (DPBF) is utilized as a probe to sense photoexcited 1 O 2 of BT photosensitizers. 58 The absorption of DPBF at 415 nm would decline after sensing with 1 O 2 , indicating the ability of PDT performance. PDT properties of the BT derivates dissolved in THF under specific laser excitation were demonstrated.…”