Fig. 2: Optical properties of J-type aggregates in HS-Pt-CDs.
From: J-type assembled Pt(IV)-coordinated carbon dots for near-infrared light-triggered pyroptosis

a Absorption spectra of Pt-CDs, intermediates, and HS-Pt-CDs. Excitation-emission maps of (b) Pt-CDs and (c) HS-Pt-CDs aqueous solutions. d Luminescent decay curves of HS-Pt-CDs monitored at 600 nm (red line) and 700 nm (blue line) under 450 nm excitation. 2D pseudo-color maps of the TA spectra of (e) Pt-CDs and (f) HS-Pt-CDs with a pump wavelength of 400 nm. g A proposed formation mechanism of Pt(IV) coordinated sp2 domain. Calculated frontier molecular orbitals for (h) monomer and dimer of Pt(IV) coordinated sp2 domains and their orbital energies in the optimized excited state