Fig. 2: NIR-II Hemicyanine chemiluminophores. | Nature Communications

Fig. 2: NIR-II Hemicyanine chemiluminophores.

From: Unimolecular near-infrared chemiluminescent reporter for cascaded multiplex imaging of ischemia-reperfusion injury in the liver-kidney axis

Fig. 2

a, b Schematic illustration of the redshift of chemiluminescence via energy-transfer-based indirect chemiluminescence emission pathway and direct chemiluminescence emission pathway. c Activation and chemiexcitation pathway of adamantyl-dioxetanes and bicyclic dioxetanes. d Evaluation of the thermal stability of BD-OTf and AD-OTf. Comparison of the reserved CL intensities of BD-OTf and AD-OTf when stored at 25 °C for different duration time. (n = 3, mean ± s.d.). e Structures of adamantyl-dioxetanes scaffold15,17,23,56 and hemicyanine-based bicyclic dioxetanes and their CL emission wavelengths are indicated by arrows. Their maxima CL emissions are given underneath the corresponding structures. f Absorption, (g) fluorescence spectra and (h) Chemiluminescence spectra of HCLS (10 μM) in dimethyl sulfoxide/H2O (v/v = 1/1). (a.u. means arbitrary units). i Molecular orbitals of HCLS. The HOMO and LUMO energy levels are indicated. j Calculated HOMO/LUMO energy gaps (ΔE) of HCLS. Source data are provided as a Source Data file.

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