823791-46-4Relevant academic research and scientific papers
X-shaped electro-optic chromophore with remarkably blue-shifted optical absorption. Synthesis, characterization, linear/nonlinear optical properties, self-assembly, and thin film microstructural characteristics
Kang, Hu,Evmenenko, Guennadi,Dutta, Pulak,Clays, Koen,Song, Kai,Marks, Tobin J.
, p. 6194 - 6205 (2007/10/03)
A novel type of "X-shaped" two-dimensional electro-optic (EO) chromophore with extended conjugation has been synthesized and characterized. This chromophore is found to exhibit a remarkably blue-shifted optical maximum (357 nm in CH2Cl2) while maintaining a very large first hyperpolarizability (β). Hyper-Rayleigh Scattering (HRS) measurements at 800 nm provide a βzzz value of 1840 × 10-30 esu. Self-assembled thin films of this chromophore were fabricated via a layer-by-layer chemisorptive siloxane-based approach. The chromophoric multilayers have been characterized by transmission optical spectroscopy, advancing contact angle measurements, synchrotron X-ray reflectivity, atomic force microscopy, and angle-dependent polarized second harmonic generation spectroscopy. The self-assembled chromophoric films exhibit a dramatically blue-shifted optical maximum (325 nm) while maintaining a large EO response (χ(2)333 ～ 232 pm/V at 1064 nm; r33 ～ 45 pm/V at 1310 nm). This work demonstrates an attractive approach to developing EO materials offering improved nonlinearity-transparency trade-offs.
Self-assembled electrooptic thin films with remarkably blue-shifted optical absorption based on an X-shaped chromophore
Kang, Hu,Zhu, Peiwang,Yang, Yu,Facchetti, Antonio,Marks, Tobin J.
, p. 15974 - 15975 (2007/10/03)
An "X-shaped" two-dimensional electrooptic (EO) chromophore with extended orthogonal conjugation was designed and synthesized. Self-assembled thin films of this chromophore were fabricated via layer-by-layer chemisorptive siloxane-based self-assembly. The films exhibit a dramatically blue-shifted optical maximum (325 nm) while maintaining a large EO response (χ33(2) ≈ 232 pm/V at 1064 nm; r33 ≈ 43 pm/V at 1550 nm). Copyright
