The complex DZ1 displayed enhanced three-photon absorption activity and could avoid light-quenching and light-bleaching effectively due to its aggregation-induced emission feature.
It is currently challenged that nonlinear optical (NLO) properties in the near-infrared region (NIR) of metal complexes can be tunable with an assistant ligand. Herein, the linear and nonlinear photophysical properties of the novel C^N^C cyclometalated Pt(II) complexes with different substituents as auxiliary ligands are presented. The complexes displayed intense triplet metal/ligand-toligand charge-transfer ( 3 MLCT/ 3 LLCT) and intraligand 3 π, π* emission at low-temperature. The excited-state characteristics are further confirmed over the TD-DFT calculations, transient absorption, and emission lifetimes. The Pt-3 possesses a relatively high quantum yield (9.1%), a moderate triplet excited-state lifetime (5.32 μs), and a broad excited-state absorption from the visible to the near-IR region. Interestingly, it was found that Pt-3 exhibited high 2PA cross section values (σ 2 up to 367 GM at 820 nm), as well as good optical limiting properties over a tunable femtosecond laser. The relationships between the structures and properties were systematically investigated on the basis of crystal structural information. Hence, cyclometalated Pt(II) complexes would become candidates for the application of the NIR NLO materials.
We present a thiophene-based terpyridine Zn(ii) complex (namely LC) which could specifically target live cell mitochondria via binding with mitochondrial DNA (mtDNA). Due to its high biocompatibility, red emission and photo-stability, mtDNA distribution within mitochondrial cristae and inner matrix in living cells was successfully visualized using stimulated emission depletion (STED) nanoscopy with unprecedented resolution.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.