10th international symposium on the synthesis and applications of isotopes and isotopically labelled compounds - poster presentations Session 19, Sunday, June 14 to Thursday, June 18, 2009
As newionic organic species for second-order non-linearoptical (NLO) materials, 4-[4-(dimethylamino)phenyl]ethynyl}phenyltrimethylammonium iodide (1a), 4-[4-(dimethylamino)phenyl]butadiynyl}phenyltrimethylammonium iodide (2a) and their derivatives with 4-substituted benzensulfonate instead of iodide were successfully synthesized. The transparent wavelength region of 1a is wider than that of a typical
Partially fluorinated skeleton of 4-[2-(4-dimethylamino-2,3,5,6-tetrafluorophenyl)ethynyl]-2,3,5,6-tetrafluoro-N,N,N-trimethylanilinium (2) was synthesized as a second-ordernonlinear optical (NLO) material to decrease the absorption around 1.3 and 1.5 μm, which deteriorates the device efficiency. Several salts of 2 were prepared, and we found that the trifluoromethanesulfonate salt of 2 (2b) had a
Glucosidation of Tetra-<i>O</i>-benzyl-α-D-glucose with Chlorosilane and Silver Sulfonate
作者:Shinkiti Koto、Naohiko Morishima、Shonosuke Zen
DOI:10.1246/bcsj.52.784
日期:1979.3
Glucosidation of 2,3,4,6-tetra-O-benzyl-α-D-glucopyranose with methanol or cyclohexanol in the presence of chlorosilane and silver sulfonate is described. As by-products, octa-O-benzyl-α,α- and -α,β-trehaloses are also formed. Possible reaction pathways are discussed.
Synthesis of Phenylbutadiynylpyridinium Derivatives for Nonlinear Optics
作者:Shin-ya Kan-no、Shuji Okada
DOI:10.1080/15421400701548993
日期:2007.9.4
1- Methyl- 4-[ 4-( dimethylamino) phenyl] butadiynyl} pyridinium ( PBP) derivatives with iodide or benzenesulfonate anion were synthesized as potential compounds for both second- and third- order NLO applications. PBP shows peculiar absorption spectrum in methanol, in which molar extinction coefficient at absorption maximum ( lambda(max)) decrease irrespective of bathochromic shift of lambda(max) compared with the corresponding compound with one triple bond between two aromatic rings. From semiempirical MO calculations, it was explained by aromatic- ring rotation of PBP in methanol. Activity on second- harmonic generation ( SHG) was found in four out of thirteen compounds synthesized. Although most of PBP derivatives were found to show exothermic reaction before melting, pure solid- state polymerization was not confirmed in these compounds.