Abstract The mechanism of thermally enhanced luminescence (TEL), such as thermally activated delayed fluorescence (TADF) and thermally stimulated delayed phosphorescence (TSDP), is of fundamental importance in the molecular design of emissive transition-metal complexes, as it can enable bright emission with enhanced radiative rate for high-performance organic light-emitting diodes (OLEDs). It is essential to resolve the excited-state landscape of complexes, including the correlation with their photophysical properties, to optimize the device efficiency. Here, we explore a series of Au(III) complexes containing asymmetric carbazolyl (Cz) motifs that regulate the co-facial distance between the electron donor and acceptor moieties. Combining with the femtosecond...

Abstract Social media has emerged as a prominent factor in shaping public perceptions. However, significant gaps remain in our understanding of the complex interplay between social media and human-nature relationships, including for mangrove ecosystems. We assessed how mangroves have been discussed and perceived on social media by analysing 649,495 Twitter/X posts between 2010 and 2022. Using NRC and AFINN lexicons, we found a prominence of positive sentiment toward mangroves across the 13‑year period. While negative sentiment was present, it was found to be co-occurring with degradation events (e.g. large dieback of mangroves in Australia in 2016). This indicates fear and...

Abstract The current paradigm of plasmon-enhanced up-conversion photoluminescence (PE-UCPL) lays in intimate coupling domains of noble metal and lanthanide-doped nanoparticles. An increase of incident electromagnetic field and radiative emission rates is the key reason for the UCPL enhancement by the primitive plasmonic architectures of metal nanospheres/nanorods/nanoshells. Based on the hypothesis of precise tuning surface plasmon resonance in more complicated nanoobjects by adjusting process-structure relationship, we engineered a PE-UCPL platform composed of -NaGdF4:Yb3+,Er3+ nanoparticles and gold dendrites on macroporous silicon (macro-PSi). The uncertainty in contribution of metal dendrites to PE-UCPL is typically due to the structural unpredictability of their highly branched morphologies during...