Zuping Xiong, Jianyu Zhang, Ziteng Zhang, Lei Wang, Shuaitong Wei, Xiong Liu, Jing Zhi Sun, Haoke Zhang, Ben Zhong Tang
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引用次数: 0
Abstract
It is still unclear how weak interactions specifically affect electronic structures. Here, we systematically reduce the number of N–H bonds within diarylmethane (DAM), precisely diminishing the number of hydrogen bonds (H-bonds). Contrary to the widely reported result that H-bonds could enhance molecular brightness by promoting electron delocalization, DAMs lacking H-bonds exhibit superior luminescence, compared to DAMs with H-bonds in both dilute solutions and solid states. It is indicated that H-bonds tend to induce n-electron localization, preventing the formation of through-space lone-pair conjugation (n–n TSC). In addition, unlike the widely studied through-space π–π conjugation that only existed in the aggregate state, the n–n TSC can even stabilize the conformation and is expressed in dilute solutions. Herein, we not only achieve bright white-light emissions in nonconjugated small molecules but also reveal the surprisingly competitive relationship between H-bonds and n–n TSC in electronic delocalization, providing a new strategy for designing excellent optoelectronic materials via the n-electron bridge.
期刊介绍:
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.