Synthesis, characterisation and optical spectroscopy of diynes and poly-ynes containing derivatised fluorenes in the backbone
作者:Muhammad S. Khan、Muna R. A. Al-Mandhary、Mohammed K. Al-Suti、Birte Ahrens、Mary F. Mahon、Louise Male、Paul R. Raithby、Clare E. Boothby、Anna Köhler
DOI:10.1039/b208963g
日期:——
A series of trimethylsilyl-protected and terminal mono- and bis-alkynes based on 9,9-dioctylfluorene, 2-(trimethylsilylethynyl)-9,9-dioctylfluorene 1a, 2-ethynyl-9,9-dioctylfluorene 1b, 2,7-bis(trimethylsilylethynyl)-9,9-dioctylfluorene 2a, 2,7-bis(ethynyl)-9,9-dioctylfluorene 2b, have been synthesised. Reaction of trans-[(PnBu3)2PtCl2] with 2 equivalents of the terminal ethyne 1b yields the mononuclear platinum(II) diyne 3, reaction of trans-[(Ph)(Et3P)2PtCl] with 0.5 equivalents of the diterminal ethyne 2b gives the dinuclear platinum(II) diyne 4 while 1 ∶ 1 reaction between trans-[(PnBu3)2PtCl2] and 2b gives the platinum(II) poly-yne 5. Treatment of 2,5-dioctyloxy-1,4-diiodobenzene with 1b in 1 ∶ 2 stoichiometry produces the organic di-yne 6 while 1 ∶ 1 reaction between 2,5-dioctyloxy-1,4-diiodobenzene and 2b, 2,7-bis(ethynyl)fluorene or 2,7-bis(ethynyl)fluoren-9-one produces the organic co-poly-ynes 7–9. All the new materials have been characterised by analytical and spectroscopic methods and the single crystal X-ray structures of 2a and 3 have been determined. The diynes and poly-ynes are soluble in organic solvents and are readily cast into thin films. Optical spectroscopic measurements reveal that the attachment of octyl side-chains on the fluorenyl spacer reduces inter-chain interaction in the poly-ynes while a fluorenonyl spacer creates a donor–acceptor interaction along the rigid backbone of the organometallic poly-ynes and organic co-poly-ynes.
一系列基于 9,9-二辛基芴的三甲基硅烷基保护和末端单炔基和双炔基,2-(三甲基硅烷基乙炔基)-9,9-二辛基芴 1a、2-ethynyl-9,9-dioctylfluorene 1b、2,7-bis(trimethylsilylethynyl)-9,9-dioctylfluorene 2a、2,7-bis(ethynyl)-9,9-dioctylfluorene 2b。反式-[(PnBu3)2PtCl2]与 2 个等量的末端乙炔 1b 反应生成单核铂(II)二炔 3,反式-[(Ph)(Et3P)2PtCl]与 0.反式-[(PnBu3)2PtCl2]与 2b 发生 1∶1 反应,得到铂(II)多炔 5。将 2,5-二辛基氧基-1,4-二碘苯与 1b 以 1∶2 的化学计量进行处理,可生成有机二炔 6,而 2,5-二辛基氧基-1,4-二碘苯与 2b、2,7-双(乙炔基)芴或 2,7-双(乙炔基)芴-9-酮进行 1∶1 反应,可生成有机共多炔 7-9。所有新材料都通过分析和光谱方法进行了表征,并确定了 2a 和 3 的单晶 X 射线结构。二炔和多炔可溶于有机溶剂,并很容易铸成薄膜。光学光谱测量结果表明,芴基间隔物上的辛基侧链减少了聚炔的链间相互作用,而芴基间隔物则在有机金属聚炔和有机共聚炔的刚性骨架上产生了供体-受体相互作用。