Jochen Vanderspikken*, Pieter Verstappen and Wouter Maes*,
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引用次数: 0
摘要
有机分子的加入已经改变了(手机)显示器市场,但共轭聚合物在光电应用中的广泛使用仍然遥遥无期。其部分原因在于共轭聚合物固有的分散性和结构可变性。事实上,阐明最先进的交替共轭(共)聚合物的确切分子结构是一项重大挑战。基质辅助激光解吸/电离-飞行时间质谱法(MALDI-ToF MS)是评估聚合物结构的重要工具,但其对较高分子量的灵敏度降低以及非定量特性在一定程度上限制了其应用。本研究探索了 MALDI-ToF MS 与分馏相结合的方法,以检测基准材料 PBTTT 及其烷氧基衍生物的较长聚合物链。对具有不同同偶联缺陷比的聚合物进行了比较,并对从 MALDI-ToF MS 收集到的信息进行了严格评估。最后,提出了一些指导原则,以帮助研究人员从交替共轭聚合物的 MALDI-ToF 质谱中提取相关数据。
Extracting Structural Data from MALDI-ToF Mass Spectrometry Analysis of Alternating Conjugated Polymers – A Case Study on PBTTT Derivatives
The incorporation of organic molecules has transformed the (mobile phone) displays market, yet the widespread use of conjugated polymers in optoelectronic applications remains elusive. This can partly be attributed to their inherent dispersity and structural variability. In fact, elucidating the exact molecular structures of state-of-the-art alternating conjugated (co)polymers presents a significant challenge. Matrix-assisted laser desorption/ionization - time-of-flight mass spectrometry (MALDI-ToF MS) is a valuable tool for evaluating polymer structures but its reduced sensitivity for higher molecular weights and nonquantitative nature somewhat restrict its implementation. This study explores MALDI-ToF MS in combination with fractionation to allow detection of longer polymer chains for the benchmark material PBTTT and its alkoxy derivative. Polymers with different homocoupling defect ratios are compared and the information gathered from MALDI-ToF MS is critically assessed. Finally, some guidelines are postulated to assist researchers in extracting pertinent data from MALDI-ToF mass spectra of alternating conjugated polymers.
期刊介绍:
Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.