Conjugated Polymer with Benzimidazolylpyridine Ligands in the Side Chain: Metal Ion Coordination and Coordinative Self-Assembly into Fluorescent Ultrathin Films
Conjugated Polymer with Benzimidazolylpyridine Ligands in the Side Chain: Metal Ion Coordination and Coordinative Self-Assembly into Fluorescent Ultrathin Films
复制标题
DOI：
10.1021/ma200126e
复制
发表时间：
2011-05
期刊：
影响因子：
5.5
通讯作者：
Irina Welterlich;B. Tieke
中科院分区：
文献类型：
--
作者：
Irina Welterlich;B. Tieke
描述了一种新型共轭共聚物的合成和特性，该共聚物具有聚（亚苯基-交替-芴）主链和通过柔性间隔基团连接到主链的2,6-双（1'-甲基苯并咪唑基）吡啶（bip）配体。该共聚物是通过 9,9-二己基芴的 2,7-双频哪醇硼酯和在 2-位和 5-位带有两个 ω-双间取代烷氧基的 1,4-二溴苯衍生物进行 Pd 催化的 Suzuki 偶联来制备的。收率为88%。该聚合物易溶于普通有机溶剂，表现出强烈的蓝色荧光，最大波长为416 nm；甲苯中的荧光量子产率为85%。用甲苯/甲醇 (99:1 v/v) 中的氯化锌和甲苯/甲醇 (24:1 v/v) 中的高氯酸亚铁对聚合物进行紫外/可见滴定，表明形成了 2:1 配体：金属离子（双）络合物。复合物的形成伴随着离子特异性颜色变化（离子变色）和配体荧光的猝灭。主链荧光部分...
The synthesis and characteristic properties of a new conjugated copolymer with poly(phenylene-alt-fluorene) main chain and 2,6-bis(1′-methylbenzimidazolyl)pyridine (bip) ligands attached to the main chain via flexible spacer groups are described. The copolymer was prepared upon Pd-catalyzed Suzuki coupling of the 2,7-bispinacolatoboron ester of 9,9-dihexylfluorene and a 1,4-dibromobenzene derivative carrying two ω-bip-substituted alkoxy groups in the 2- and 5-position. The yield was 88%. The polymer is readily soluble in common organic solvents and exhibits a strong blue fluorescence with maximum at 416 nm; the fluorescence quantum yield in toluene is 85%. UV/vis titration of the polymer with zinc chloride in toluene/methanol (99:1 v/v) and ferrous perchlorate in toluene/methanol (24:1 v/v) indicates formation of 2:1 ligand:metal ion (bis)complexes. Complex formation is accompanied by ion specific color changes (ionochromism) and quenching of the ligand fluorescence. The backbone fluorescence is partially...