LEWIS ACID CATALYZED HALOGENATION OF ACTIVATED CARBON ATOMS

• 20050713904P (2005.9.2) US

A borate-based crystal excellent in uniformity and reliability, which is useful as an optical wavelength conversion device, etc., and can be easily produced at low cost in a short period of time, by the steps of dissolving water-soluble starting materials in water to prepare an aqueous solution, evaporating water in the aqueous solution followed by sintering or evaporating the water and not sintering, thereby forming a crystal growth material, and melting the resultant material to grow a crystal. Further, a highly reliable laser oscillation apparatus can be achieved by using this crystal as an optical wavelength conversion device. <IMAGE>

• UNIVERSITY OF CHICAGO
• JAPAN SCIENCE AND TECHNOLOGY AGENCY

• ZHANG, YANHUA
• YAMAMOTO, HISASHI

• C07D 207/34      異種原子，または異種原子に対する３個の結合をもち，そのうち多くても１個がハロゲンに対する結合である炭素原子，例．エステルまたはニトリル基，が環の炭素原子に直接結合したもの
• B01J  21/18      炭素
• C07D 213/22      相互に直接連結する２個またはそれ以上のピリジン環を含有するもの，例．ビピリジル
• C07D 307/78      ベンゾ〔ｂ〕フラン；水素添加したベンゾ〔ｂ〕フラン