电化学发光
离域电子
材料科学
发光体
纳米技术
激发态
氮化碳
氮化物
光发射
光化学
化学物理
光电子学
发光
化学
原子物理学
物理
光催化
物理化学
催化作用
有机化学
生物化学
图层(电子)
电极
作者
Yanfeng Fang,Yuhua Hou,Hong Yang,Ran Chen,Wang Li,Jin Ma,Dan Han,Xuwen Cao,Songqin Liu,Yanfei Shen,Yuanjian Zhang
标识
DOI:10.1002/adom.202201017
摘要
Abstract Highly efficient inter‐conversion of different types of energy is the core of science and technology. Among them, electrochemiluminescence (ECL), an emission of light excited by electrochemical reactions, has drawn attention as a powerful tool across diverse fields in addressing global energy, environment, and health challenges. Nonetheless, the ECL efficiency (Φ ECL ) of most luminophores in aqueous solutions is low, significantly hampering their broad applications. Along this line, developing ECL luminophores with high Φ ECL and understanding the associated intrinsic factors is highly envisioned. Herein, taking carbon nitride (CN) with rigid 2D backbones as an emerging model luminophore, it is reported that the orbital delocalization is a unified and quantifiable factor for its Φ ECL . Behind the complicated transformation of molecular structures of cyano‐terminal groups and triazine/heptazine basal frameworks, the orbital delocalization of CN is found to be generally improved at an elevated condensation temperature. Such intrinsic evolution in electronic structure favored the electron injection in excitation and follow‐up photon emission in ECL for CN. As a result, the cathodic Φ ECL of CN is remarkably improved to a new milestone of 24‐fold greater than the previous record.
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