科学网-2025年10月嘲风作品集（一）-宋元元的博文

2025年10月嘲风作品集（一）

2025-12-29 15:32

阅读：839

▲ Vol 04 Issue 04 | October , 2025

Tailoring memory performance via engineering conjugated bridges in benzo[c][1,2,5]thiadiazole based donor–acceptor small molecules

Xianglin Wang, Hong Lian, Liang Zhao, Zhitao Qin, Yongge Yang, Tianxiao Xiao, Shuanglong Wang, Qingchen Dong

Tuning the conjugated bridges between the electron-donor and electron-acceptor moieties plays a crucial role in enhancing the memristive properties of organic materials, yet it is rarely reported. Herein, we designed and synthesized four donor–acceptor (D-A) organic small molecules, namely 4,7-bis(4-((9H-fluoren-9-ylidene)(phenyl)methyl)phenyl)benzo[c][1,2,5]thiadiazole (DF-BT), 4,7-bis((4-((9H-fluoren-9-ylidene)(phenyl)methyl)phenyl)ethynyl)benzo[c][1,2,5]thiadiazole (DF-ynl-BT), 4,7-bis(5-(4-((9H-fluoren-9-ylidene)(phenyl)methyl)phenyl)thiophen-2-yl)benzo[c][1,2,5]thiadiazole (DF-Th-BT), and 4,7-bis((5-(4-((9H-fluoren-9-ylidene)(phenyl)methyl)phenyl)thiophen-2-yl)ethynyl)benzo[c][1,2,5]thiadiazole (DF-Th-ynl-BT), featuring unique conjugated bridges. These molecules were employed as active layers in resistive random-access memory (RRAM) devices to systematically investigate the influence of conjugation bridges on the electrical parameters. The results revealed that devices based on DF-BT, DF-ynl-BT, and DF-Th-BT exhibited write-once-read-many-times (WORM) characteristics, while the DF-Th-ynl-BT-based device demonstrated stable Flash-type switching behavior. Compared to DF-BT, memory devices utilizing DF-ynl-BT, DF-Th-BT, and DF-Th-ynl-BT, which incorporate additional conjugated bridges, exhibited nonvolatile memory properties with reduced threshold voltages, an improved ON/OFF current ratio, enhanced stability, and better uniformity. These findings demonstrated that tailoring the conjugated bridges in D-A molecules can effectively modulate resistive memory behavior and enhance device performance. Furthermore, the DF-Th-ynl-BT-based device was successfully integrated into logic gate circuits and display functions, highlighting its significant potential for applications in artificial intelligence (AI) neural networks.

https://www.sciencedirect.com/science/article/pii/S2772571525000312

▲ Vol 27 Issue 38 | 14 October , 2025

Tracking the hydrogen spillover of heterogeneous catalysts in hydrogenation: from formation, migration, and regulation to fate

Guangxun Sun, Peng Xue, Lei Wang, Xin Zhang, Guangzheng Sun, Zhidong Wang, Qian Zhang, Peng Zhang, Yunqi Liu and Yuan Pan

Hydrogen spillover is a critical factor in enhancing the hydrogenation of heterogeneous catalysts. However, understanding and orderly controlling spillover are still challenging. The structural design of heterogeneous catalysts significantly promotes hydrogen spillover, which affects the activity, selectivity, and stability of hydrogenation. However, to date, very few systematic reviews have tracked the period of hydrogen spillover in heterogeneous catalysis. Herein, we systematically reviewed the recent research progress on hydrogen spillover from formation and fate to regulation. A strengthening mechanism of hydrogen spillover in hydrogenation for the catalytic reaction process is proposed. In addition, targeted regulatory strategies for promoting hydrogen spillover are summarized via constitutive relationships to guide the development of highly efficient hydrogenation catalysts. Finally, the opportunities and challenges of hydrogen spillover are prospectively discussed, providing theoretical guidance for the catalytic hydrogenation methodology.

https://pubs.rsc.org/en/content/articlelanding/2025/gc/d5gc02983j

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