Mechanistic Insights: Correspondence on “Tuning Co‐Operative Energy Transfer in Copper(I) Complexes Using Two‐Photon Absorbing Diimine‐Based Ligand Sensitizers”

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Июнь 1, 2025

Abstract In a recent communication, Collins and coworkers presented Cu(I) complex with photocatalytic activity under red light LED conditions, mainly for singlet oxygen‐driven reactions. Guided by steady‐state emission measurements 800 nm excitation, the authors suggested that underlying mechanism generation of photoexcited key species is simultaneous two‐photon absorption via virtual state. However, such requires pulsed laser excitation cannot compete when conventional one‐photon also feasible selected wavelength range. Using several spectroscopic techniques reactivity assays different color intensity we unambiguously demonstrate followed rather inefficient oxygen (quantum yield <5%) responsible observed photoreactivity complex. addition, briefly summarize general mechanistic considerations, estimate typical photon densities required variety mechanisms, highlight importance optical filters impurities to avoid artifacts in spectra, present some guidelines differentiation between one‐ mechanisms.

Язык: Английский

Mechanistic Insights: Correspondence on “Tuning Co‐Operative Energy Transfer in Copper(I) Complexes Using Two‐Photon Absorbing Diimine‐Based Ligand Sensitizers”

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Июнь 1, 2025

Abstract In a recent communication, Collins and coworkers presented Cu(I) complex with photocatalytic activity under red light LED conditions, mainly for singlet oxygen‐driven reactions. Guided by steady‐state emission measurements 800 nm excitation, the authors suggested that underlying mechanism generation of photoexcited key species is simultaneous two‐photon absorption via virtual state. However, such requires pulsed laser excitation cannot compete when conventional one‐photon also feasible selected wavelength range. Using several spectroscopic techniques reactivity assays different color intensity we unambiguously demonstrate followed rather inefficient oxygen (quantum yield <5%) responsible observed photoreactivity complex. addition, briefly summarize general mechanistic considerations, estimate typical photon densities required variety mechanisms, highlight importance optical filters impurities to avoid artifacts in spectra, present some guidelines differentiation between one‐ mechanisms.

Язык: Английский