About this Research Topic
Circularly polarized luminescence (CPL) is the difference, measured in emission, of left- and right-circularly polarized light components from chiral compounds. It handles rich information about molecular chirality in the excited state. The degree of CPL is generally reported by the luminescence dissymmetry factor glum, which is defined by the ratio of such intensity difference divided by the average emitted intensity. Most organic based molecules exhibit relatively low values for glum, normally on the order of 10-2 to 10-3. Larger glum values are observed for lanthanide compounds because of their magnetically-allowed f–f transitions, or may be generated in supramolecular aggregates. The increasing interest of CPL technique is attributed to instrumental development and to its application in bio-responsive studies and to development of smart materials for advanced photonic technologies.
The aim of this Research Topic is to bring together cutting-edge original research articles and reviews regarding the synthesis, the structural characterization, the CD and CPL measurements and theoretical simulations of organic chromophores participating in the CPL signal enhancement of chiral molecules or systems. CPL dyes based on organic chromophores are highly valuable in photonic materials. CPL can also be conveniently used to sense pH, ions, metal-ligand interaction and aggregated/fibrillar structure or for the structural studies of biological molecules when lanthanides are employed. The Research Topic will provide a guidance for the future rational design of chiral molecules or systems suitable for various CPL applications in biochemical and material studies.
We encourage CPL enhancement studies in all chiral molecules or systems, including small organic molecules, polymers, supramolecular aggregates, biomolecules, and metal complexes including lanthanides. This Research Topic accepts Review Papers and Research Papers. Both experimental and theoretical works are welcome, but combinations are particularly welcome.
Keywords: emission, circularly polarized luminescence, chiral organic chromophores, excited state, synthesis, chirality enhancement, circularly polarized phosphorescence
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