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Updated: Jun 14, 2025

Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology
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在NIR中吸收基于ferrocenyl perylenediimide的供体-受体染色体

Mohd Wazid1, Rajneesh Misra1

  • 1Department of Chemistry, Indian Institute of Technology Indore (M.P.), 453552, India. rajneeshmisra@iiti.ac.in.

Dalton transactions (Cambridge, England : 2003)
|September 2, 2024
PubMed
概括

合成了具有可调节电子性质的新型铁基功能化佩里伦胺 (PDI) 化合物. 这些材料表现出显著的近红外吸收转移,表明了先进光电子应用的潜力.

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UV–Vis Spectroscopy: Woodward–Fieser Rules

UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given...
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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.
Selection Rules: Photochemical Activation
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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
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