• circularly polarized luminescence
• CPL
• lanthanide complexes
• near infrared
• NIR

Circularly polarized luminescence (CPL) has emerged as a captivating area of
exploration in materials chemistry and physics, offering diverse applications in
both biological and technological realms. This thesis delves into the intriguing
intersection of CPL and lanthanide complexes, specifically focusing on their
unique chiroptical properties arising from electric‑dipole‑forbidden,
magnetic‑dipole‑allowed f‒f transitions. In the pursuit of harnessing the full
potential of lanthanide complexes, we explore their chiroptical prowess in the
NIR region, a terrain uncharted. While limited reports exist, particularly for Yb in
the 900‒1040 nm range, our research uncovers rare instances of NIR chiroptical
properties in lanthanide complexes at lower energies.
To experimentally quantify and characterize these unique features, we developed
a straightforward yet effective, inexpensive setup. The results revealed
remarkably strong CPL in complexes emitting between 1400‒1600 nm.
In tandem with the investigation into NIR‑emitting complexes, we explored the
realm of complexes showing CPL upon two‑photon excitation around 700 nm.
Again, this exotic process has substantial implications for applications in
bioassays and confocal microscopy, yet there are still few reports, mainly due to
the complex instrumental setup and the limited number of suitable two‑photon
excitable CPL dyes.