A novel class of nonlinear optical materials based on host–guest composites: zeolites as inorganic crystalline hosts

Abstract

The demand for nonlinear optical (NLO) materials with exceptional NLO properties is very large, and hence the search for such materials should be continued not only to enhance their functions in current applications but also to help expedite the materialization of photonics in which photons instead of electrons are used for signal processing, transmission, and storage. This article summarizes the preparation, characteristics, and the future perspectives of novel second order nonlinear optical (2NLO) materials prepared by orientation-controlled incorporation of 2NLO molecules into zeolite channels and third order nonlinear optical (3NLO) materials prepared by compartmentalization of very small (<1.3 nm) PbS QDs within zeolite nanopores under different environments, and the novel chemistry newly unveiled during the preparation of novel zeolite based NLO materials.

Large Increase in the Second‐Order Nonlinear Optical Activity of a Hemicyanine‐Incorporating Zeolite Film

“…Consistent with literature reports, [31,32] SL-0F crystals showed a broad peak arising from internal Q 3 Si atoms bearing OH groups in the region between d = À100 and À105 ppm in addition to two envelopes of broad unresolved peaks arising from Q 4 Si atoms in the region between d = À108 and À118 ppm. In contrast, SL-1F, SL-1.5F, and SL-2F crystals did not show the Q 3 Si peaks, but showed 29 Si NMR spectra which are the same with that reported by Thomas and Fyfe. [33] This confirms that they have much less defect sites arising from the Si deficiency.…”

“…The crystals are denoted as SL-xF, where x = 0, 1, 1.5, and 2, respectively. Their magic angle spinning (MAS) 29 Si-NMR spectra are compared in Figure 2 a. Consistent with literature reports, [31,32] SL-0F crystals showed a broad peak arising from internal Q 3 Si atoms bearing OH groups in the region between d = À100 and À105 ppm in addition to two envelopes of broad unresolved peaks arising from Q 4 Si atoms in the region between d = À108 and À118 ppm.…”

“…[25][26][27][28][29] The structures of the mostly studied HC molecules are the HCs with different alkyl chain lengths n (HC-n, where n = 3, 6,9,12,15,18,22, and 24, see Figure 1 …”

“…The 2w intensities (I 2w ) of the HC-n-incorporating SL 2 /G plates have been measured by the Maker fringe method and the measured I 2w values were compared with respect to that of a reference material (a 3 mm thick y-cut quartz crystal, We thank J. Y. Lee for providing Figure 1 and the picture for the table of contents. We also thank KBSI Daegu for the measurements of 29 Si NMR spectra.…”

Material hibrido organiko-ez-organiko fluoreszenteak aplikazio optikoetarako

“…Ildo horretan, dimentsio bakarreko zeolitak eta mikroporoak dituzten zeotipoak oso interesgarriak dira material anfitrioi gisa erabiltzeko, duten egituraren izaera irekia eta ondo definituriko barne-kanalak direla eta [7][8][9]. Koloratzaileak egitura horietan sartzean lortzen diren material hibridoek barne-antolaketa maila oso altua erakusten dute, non molekula fotoaktiboak orientazio jakin batean lerrokatzen diren, euskarri ez-organikoak ezartzen dituen murrizketa geometrikoak direla medio.…”