The relationship between magneto-optical properties and molecular chirality

Abstract

The chiral nonanuclear Tb(III) clusters [Tb-9(sal-(R)-Bt)(16)(mu-OH)(10)]+[NO3]-(Tb-(R)-Bt: sal-(R)-Bt=(R)-2-butyl salicylate) and [Tb9 (sal-(S)-Bt)(16)(mu-OH)(10)](+)[NO3](-)(Tb-(S)-Bt: sal-(S)-Bt=(S)-2-butyl salicylate) were found to exhibit a unique magneto-optical property: the Faraday effect. The clusters were composed of 9 Tb(III) ions bridged by 10 mu-OHs and 16 chiral salicylic acid esters. The Faraday rotation angle of Tb-(R)-Bt was greater than that of Tb-(S)-Bt, indicating that the Faraday effect was affected by the chirality of the Tb(III) clusters. The chiroptical properties of the Tb(III) clusters were estimated using circular dichroism and circularly polarized luminescence. In this study, a new finding concerning chiral magneto-optical properties was investigated

Quantifying the Overall Efficiency of Circularly Polarized Emitters

“…For this reason, in Table 7 only the g lum values of this transition are listed. The surveyed Tb 3+ complexes [104–108] present extinction coefficients in the range of 23000–75000 m −1 cm −1 and in most cases the g lum values are in the order of 10 −2 . The 5 D 4 7 F 5 transition is usually the most intense one, giving rise to the typical green emission of Tb.…”

Critical Role of Energy Transfer Between Terbium Ions for Suppression of Back Energy Transfer in Nonanuclear Terbium Clusters

“…An Ln(III) cluster would therefore be the best candidate because it consists of a core of oxygen-bridged Ln(III) ions, and hence the distance between Ln(III) ions is very short, usually about 3.7 Å43444546474849. We previously reported opto-magnetic properties of a nonanuclear Tb(III) cluster5051. It was found that the structural features of this cluster, especially the closely assembled Tb(III) ions and the strong interaction between them, enhances the opto-magnetic property.…”

Organic Chiral Spin‐Optics: The Interaction between Spin and Photon in Organic Chiral Materials

“…Inorganic lanthanide compounds exhibit the magneto-optical Faraday effect due to the larger orbital angular momentum of the 4f electron. [48] The experimentally measured rotation angle will consist of two parts: the magnetic rotation θ F due to the Faraday effect and the natural rotation θ CD due to chirality. Therefore, applying a magnetic field parallel (+) or antiparallel (−) to the light propagation direction will obtain different rotation angles, θ ± = ± θ F + θ CD .…”