Solid‐State Photoluminescent Imine‐Linked Two‐Dimensional Covalent Organic Frameworks DOI

Changsheng Du,

Wenjing Na, Haojie Huang

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Abstract The development of efficient solid‐state luminescent covalent organic frameworks (COFs) is crucial for advancing applications in sensing, imaging, and optoelectronics. However, achieving high photoluminescent quantum yields (PLQY) imine‐linked COFs remains challenging due to the presence complex nonradiative quenching pathways. Here, design synthesis a novel series 2D (2D COFs) are reported through condensation rigid building blocks. These display crystallinity porosity, with remarkable PLQY up 39% solid state. efficiency attributed donor–acceptor–donor structure within aldehyde moieties, which facilitates selective charge transfer excitation between donor moiety, triphenylamine, acceptor benzothiadiazole, bypassing imine bonds, suppressing pathways associated bond rotation excited states. Furthermore, obtained COF shows potential bioimaging applications.

Язык: Английский

Construction of Metal‐Covalent Organic Frameworks with Trinuclear Copper Cluster for Efficient Triboelectric Nanogenerators DOI

Huayun Ma,

Qiang Zhang, Zhiqiang Zhu

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 22, 2025

Abstract Metal‐cluster‐based covalent organic frameworks (MCOFs), obtained through connections between metal clusters and molecules, have shown considerable promise in many applications. However, MCOFs rarely been employed as triboelectric materials nanogenerators (TENGs), their corresponding effect on the output has not systematically elucidated. Here, for first time, a set of (Cu 3 ‐S‐MCOF, Cu ‐M‐MCOF, ‐L‐MCOF) having similar skeletons but different pore spaces (2.1, 3.4, 4.2 nm) are synthesized using copper‐cyclic trinuclear units. All utilized fillers methyl cellulose (MC) matrix to prepare series films layers TENGs. Kelvin probe force microscopy (KPFM) showed that surface charge density fabricated can be precisely altered based MCOFs. The mixing ratio MC is optimized boost outputs A very high current voltage up 54.8 µA 532.9 V, respectively, at 5 Hz from TENG with 10wt%Cu ‐M‐MCOF@MC, which further sensor monitor human motions. This study provides new insights into investigation MCOF tunable functionality achieve high‐performance devices.

Язык: Английский

Процитировано

0
Solid‐State Photoluminescent Imine‐Linked Two‐Dimensional Covalent Organic Frameworks DOI

Changsheng Du,

Wenjing Na, Haojie Huang

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Abstract The development of efficient solid‐state luminescent covalent organic frameworks (COFs) is crucial for advancing applications in sensing, imaging, and optoelectronics. However, achieving high photoluminescent quantum yields (PLQY) imine‐linked COFs remains challenging due to the presence complex nonradiative quenching pathways. Here, design synthesis a novel series 2D (2D COFs) are reported through condensation rigid building blocks. These display crystallinity porosity, with remarkable PLQY up 39% solid state. efficiency attributed donor–acceptor–donor structure within aldehyde moieties, which facilitates selective charge transfer excitation between donor moiety, triphenylamine, acceptor benzothiadiazole, bypassing imine bonds, suppressing pathways associated bond rotation excited states. Furthermore, obtained COF shows potential bioimaging applications.

Язык: Английский

Процитировано

0