Synthesis and Solvatochromic Behavior of Pyrene Derivatives with 4-Hydroxyphenyl and 4-Hydroxyphenylethynyl Groups
作者:Isao Yamaguchi、Katsuhiko Sato
DOI:10.1246/bcsj.20130144
日期:2013.10.15
1-(4-Methoxyphenyl)pyrene (PyrPhOMe(1)), 1,3,6,8-tetrakis(4-methoxyphenyl)pyrene (PyrPhOMe(4)), 1-(4-methoxyphenylethynyl)pyrene (PyrC≡CPhOMe(1)), 1,3,6,8-tetrakis(4-methoxyphenylethynyl)pyrene (PyrC≡CPhOMe(4)), 1-(4-hydroxyphenylethynyl)pyrene (PyrC≡CPhOH(1)), and 1,3,6,8-tetrakis(4-hydroxyphenylethynyl)pyrene (PyrC≡CPhOH(4)) were synthesized via organometallic complex catalysis. Deprotection of the methoxy groups of PyrPhOMe(1) and PyrPhOMe(4) was conducted by treatment with BBr3. Deprotonation of the OH groups of PyrPhOH(1), PyrPhOH(4), PyrC≡CPhOH(1), and PyrC≡CPhOH(4) through treatment with NaH caused a bathochromic shift in the absorption and photoluminescence (PL) peaks. The bathochromic shift of the deprotonated species increased with the donor number (DN) of the solvents. These observations can be explained as the consequence of intramolecular charge transfer (ICT) from the ONa groups to the pyrene core.
1-(4-甲氧基苯基)芘 (PyrPhOMe(1))、1,3,6,8-四(4-甲氧基苯基)芘 (PyrPhOMe(4))、1-(4-甲氧基苯乙炔)芘 (PyrC≡CPhOMe(1))、1,3,6,8-四(4-甲氧基苯乙炔)芘 (PyrC≡CPhOMe(4))、1-(4-羟基苯乙炔)芘 (PyrC≡CPhOH(1)) 和 1,3,6,8-四(4-羟基苯乙炔)芘 (PyrC≡CPhOH(4)) 是通过有机金属复合物催化法合成的。PyrPhOMe(1) 和 PyrPhOMe(4) 的甲氧基去保护是在 BBr3 处理下进行的。通过 NaH 处理 PyrPhOH(1)、PyrPhOH(4)、PyrC≡CPhOH(1) 和 PyrC≡CPhOH(4) 的羟基去质子化引起了吸收和光致发光(PL)峰的红移。去质子化物种的红移随着溶剂的供体数(DN)增加而增加。这些观察可以解释为来自 ONa 基团到芘核心的分子内电荷转移(ICT)的结果。