Natural protoberberine alkaloid–montmorillonite nanocomposite powders with AIE features for visualizing high-resolution latent fingerprints

Neutral d8 metal complexes with intervalence charge-transfer transition trigger an effective NIR-II photothermal conversion for solar-driven desalination

“…This also causes narrowed energy gaps and decreased adiabatic energies ( E ad ) as central metals are exchanged from nickel to palladium and platinum. According to the analysis of the four-point method, 47 the energy difference of absorption from S 0 to S 1 states ( E abs ), that of emission from S 1 to S 0 states ( E em ), that of relaxation in the S 0 ( E r ) and S 1 states, and E ad were estimated, respectively, and they are listed in the table of Fig. 3b.…”

“…In addition, the E * r and E r values caused by vibrational relaxation mean the congurational reorganization energies between S 0 and S 1 states, which are a leading cause of the nonradiative transition decay. 46,47 The total reorganization energies ðE * r þ E r valuesÞ for NiPN (65 meV) are higher than those for PdPN (46 meV) and PtPN (47 meV), implying more considerable vibrational relaxation energy for the former in deexcitation. The congurational reorganization via the nonradiative decay will favor enhancing the photothermal conversion property.…”

Palladium-Catalyzed Arylations towards 3,6-Diaryl-1,3a,6a-triazapentalenes and Evaluation of Their Fluorescence Properties

“…It is difficult to assess the extent to which these shifts are due to an increased rotational freedom of the C6-aryl moiety leading to a different degree of coplanarity in the ground and excited state, or to interactions between a permanent electrical dipole of the dye and a polar solvent. The former phenomenon is related to the blocking of internal rotation in aggregates or in the solid state [25]. With the exception of TAP4c, the shifts are systematically larger for the emission than for the absorption spectra, indicating in the first case a curvature of the ground state potential energy surface for rotation of the C6aryl, which is larger than that of the excited state potential energy surface.…”

Natural Nano-Minerals (NNMs): Conception, Classification and Their Biomedical Composites

“…High-performance and biocompatible fingerprint powders are essential for clear and reliable latent fingerprints (LFP) imaging. Ni et al 105 prepared berberine chloride (BBC) mixed with natural Mt mineral (BBC/Mt). The BBC/Mt powder exhibited bright solid luminescence due to the restriction of intramolecular motions (RIM) effect.…”

“…(b) Schematic representation of BBC/Mt for visualizing high-resolution LFP. Reprinted with permission from ref ( 105 ). Copyright 2023 Elsevier.…”