Scholarlink

<p>Excitation-dependent multicolor emission from a single-component system, independent of aggregation, remains a fundamental challenge due to inherent difficulties in innovative principles. Herein, we propose a molecular symmetry-breaking strategy to enrich electronic processes, enabling the molecule to exhibit excitation-dependent multicolor emissions from one chemical entity. A star-shaped molecule, 1,3,5-(4-<i>tert</i>-butylphenyl-<i>o</i>-carboranyl-4-phenyl)benzene (Ph-3CP) is designed, where spatial restriction induces inequivalence among three bulky, non-planar branches. This asymmetry gives rise to a broad excitation-dependent emission range of nearly 175 nm across solution, amorphous, and crystalline states. Crystallization from different solvents successfully traps distinct asymmetric conformers of Ph-3CP, providing direct experimental evidence for the predicted symmetry-breaking structures from theoretical calculations. Structure-property relationship studies further reveal two distinct relaxation pathways that dominate the emission behavior of this molecular system. Leveraging these properties, we develop a single-component fluorescence sensor array that enables rapid and selective identification of chlorinated hydrocarbon vapors. This work provides a general strategy for designing multifunctional luminescent materials through symmetry-controlled excited-state engineering.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Single-component-based multicolor emissions enabled by symmetry breaking

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月30日

查看全文
  • Simin Lin,
  • Xubin Wang,
  • Huisi Li,
  • Jiancheng Zhou,
  • Ruijuan Wen,
  • Jianfei Ma,
  • Shiwei Yin,
  • Ling-Ya Peng,
  • Haonan Peng,
  • Yu Fang

摘要

Excitation-dependent multicolor emission from a single-component system, independent of aggregation, remains a fundamental challenge due to inherent difficulties in innovative principles. Herein, we propose a molecular symmetry-breaking strategy to enrich electronic processes, enabling the molecule to exhibit excitation-dependent multicolor emissions from one chemical entity. A star-shaped molecule, 1,3,5-(4-tert-butylphenyl-o-carboranyl-4-phenyl)benzene (Ph-3CP) is designed, where spatial restriction induces inequivalence among three bulky, non-planar branches. This asymmetry gives rise to a broad excitation-dependent emission range of nearly 175 nm across solution, amorphous, and crystalline states. Crystallization from different solvents successfully traps distinct asymmetric conformers of Ph-3CP, providing direct experimental evidence for the predicted symmetry-breaking structures from theoretical calculations. Structure-property relationship studies further reveal two distinct relaxation pathways that dominate the emission behavior of this molecular system. Leveraging these properties, we develop a single-component fluorescence sensor array that enables rapid and selective identification of chlorinated hydrocarbon vapors. This work provides a general strategy for designing multifunctional luminescent materials through symmetry-controlled excited-state engineering.