Abstract
We present organic, diamagnetic materials based on structurally simple (hetero-)tolane derivatives. They form crystalline thin-film aggregates that are suitable for Faraday rotation (FR) spectroscopy. The resulting new materials are characterized appropriately by common spectroscopic (NMR, UV-Vis), microscopy (POM), and XRD techniques. The spectroscopic studies give extremely high FR activities, thus making these materials promising candidates for future practical applications. Other than a proper explanation, we insist on the complexity of designing efficient FR materials starting from single molecules.
Highlights
Faraday rotation (FR) is a magneto-optic (MO) effect that was discovered more than a century ago [1]
Applications of FR are of practical relevance for magnetic field sensors, wave guiding, fiber-optics, etc. [2,3,4]
ItItisisclear thatmacroscopic macroscopicorganization organizationwithin withinthe the bulk bulk material material is a key factor in obtaining a high
Summary
Faraday rotation (FR) is a magneto-optic (MO) effect that was discovered more than a century ago [1]. It is the rotation of the plane of polarization in the presence of a longitudinal magnetic field, and the rotation angle θ can be described by θ = VBL with the angle of polarization rotation,. Applications of FR are of practical relevance for magnetic field sensors, wave guiding, fiber-optics, etc. The field of magneto-optics has been dominated by inorganic materials or radical species [5,6,7,8]. The exact origin of Faraday rotation in organic molecules is currently unknown, different research groups have dedicated their efforts to designing new organic materials for FR applications Recently have diamagnetic organic materials emerged as novel FR supplies [9,10,11,12,13,14].
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