Effects of chalcogen atoms on the third-order hyperpolarizability of xanthone homologues

✍ Scribed by Takushi Sugino; Nobuaki Kambe; Noboru Sonoda; Toru Sakaguchi; Masaru Miya

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 327 KB
• Volume: 239
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)00412-w

✦ Synopsis

The third-order nonlinear hyperpolarizabilities ('y) of anthrone (ATN), xanthone (O-XTN), thioxanthen-9-one (S-XTN), and selenoxanthen-9-one (Se-XTN) have been measured in tetrahydrofuran (THF) solution by degenerate four-wave mixing (DFWM) using 7 ns and 40 ps pulses with a wavelength of 532 nm. The obtained ~/ of these four compounds using 7 ns pulses are 6.9 × 10 -34, 0.9 × 10 -34, 87 X 10 -34 and 12 X 10 -34 esu and those using 40 ps pulses are 3.9 X 10 -35, 19 × 10 -35, 15 X 10 -35, and 8.2 × 10 -35 esu. These results indicate that the 3' of xanthone homologues depend largely upon the element at the 10-position especially when 7 ns pulses were used. It is proposed that a very large "y of S-XTN obtained using a 7 ns pulse may arise from thermal mechanisms.