Triphenylarsane Oxide Complexes of Lanthanide Nitrates: Polymorphs and Photophysics

Abstract

) 2 (Ph 3 AsO) 4 ](NO 3 ) 2 (1) and mer-[Ln(NO 3 ) 3 (Ph 3 AsO) 3 ] (2) complexes were prepared from Ln(NO 3 ) 3 ·xH 2 O and Ph 3 AsO in chloroform (Ln = Y, Sm, Eu, Tb, and Dy). Production of complexes 1 vs. 2 and solvent content was found to be highly dependent on crystallization solvent choice. Tb and Eu produced only 1, while the other Ln metals produced both 1 and 2. Solvent-free, acetone-, and methanol-containing polymorph series were identified for complexes 1. Acetone/ether-and CH 2 Cl 2 -contain-

Investigation on Spectroscopic and Laser Properties of Pyrromethene and Perylene Chromophores in Elastic Polymeric Hosts

“…Since the mid 1980s, intensive research efforts had been devoted to the solidification of organic laser dyes, which might bring benefits such as non‐toxic and maintenance‐free in comparison with liquid dye lasers . In recent years, significant progresses had been witnessed in this field, i.e., solid‐state tunable laser media were activated by dye molecules, which were demonstrated to be crucially important tools in a wide variety of novel applications, from spectroscopy to isotopic separation, photochemistry, medical diagnosis and therapy . By utilizing various host matrices, for instances, the fluorinated polymers,, organic‐inorganic hybrid materials,, , and nano‐particles dispersed polymers,, , as the solid hosts, and synthesizing various dye molecules, e.g., pyrromethene and perylene dyes in the yellow and red spectral ranges, the durability or longevity of the organic tunable lasers, which had been regarded as one of the most crucial obstacles for practical use from long before, was improved to an extent that problems related to commercial employment were partially resolved.…”