Poled sol–gel materials doped with heterocycle-based push–pull chromophores with second-order optical non-linearity

Electro-optics poled sol–gel materials doped with heterocycle push–pull chromophores

“…2a the decreasing of the epoxy band at 930 scm À 1 and of the Si -OH absorption at about 910 cm À 1 are observed, indicating the progress of both the organic and inorganic condensation with thermal treatment. The first derives from the progress of the coupling reaction between residual amine and epoxy rings, as previously reported [10]. The completion of these reactions requires a treatment at between 110 and 140 -C. Fig.…”

“…The cromophore was incorporated in 3-Glycidoxypropyltrimethoxysilane (GPTMS) [8] and 3-Glycidoxypropyldimethoxymethylsilane (GDMMS) derived hybrid material. Homogeneous dispersion of the dye has been obtained using N-hydroxyethylcarbazole that acts as a physical spacer inhibiting dye aggregation of BisOH.PETCN [9,10]. Amino groups were introduced in the matrix via TMESPE (as network modifiers), to reduce the photobleaching process, by quenching the formation of the singlet oxygen, as reported in previous work [8,9].…”

Hybrid glass-like films through sol–gel techniques

“…The synthesis, which experimental details are reported elsewhere [7], starts with the co-hydrolysis of GPTMS and TEOS in methanol and water, under reflux conditions. Then, the amine-bearing alkoxide, for instance N-[(3-trimethoxysilyl)propyl]ethylenediamine (TMESPE) ( Fig.…”

Coumarin and Hydroxyl Decorated Viscosity Sensitive Triphenylamine Derivatives: Synthesis, Photophysical Properties, Viscosity Sensitivity, TD‐DFT, and NLO Properties

“…Organic push pull NLOphores with low refractive index, dielectric constant, rapid response time with electrooptic effect, noncentrosymmetric, asymmetric polarization are synthesized recently . NLOphores having different functionalities show response to different stimuli like mechanochromism FMR and AIEE.…”

“…Organic push pull NLOphores with low refractive index, dielectric constant, rapid response time with electrooptic effect, noncentrosymmetric, asymmetric polarization are synthesized recently, NLOphores having different functionalities show response to different stimuli like mechanochromism FMR and AIEE. and they have applications in optoelectronics and also in biological research, data storage, telecommunication, Nowadays there is a great deal of interest in the designing chromophores with strong nonlinear optical properties in the red region .…”