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Updated: Feb 28, 2026

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
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Published on: February 10, 2020

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对三坐标Cu(i) β-diketiminate异化物染色体的立体增强,以实现微秒激发状态寿命

Ashish Kumar1, Dooyoung Kim1, Sean P Dunphy2

  • 1Department of Chemistry, University of Houston Houston Texas 77204 USA tteets@uh.edu.

Chemical science
|February 26, 2026
PubMed
概括

硬质增强的铜 (I) 复合物显示出更好的兴奋状态寿命,超过1μs. 这项研究优化了铜的电荷转移染色体,用于先进的光敏化应用.

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The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
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Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
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