†Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
‡PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
J Am Chem Soc. 2015 Aug 5;137(30):9519-22. doi: 10.1021/jacs.5b04178. Epub 2015 Jul 27.
Simple yet ubiquitous multimolecular assembly systems with color-tunable emissions are realized by cooperative electron donor-acceptor interactions, such as the boron-nitrogen (B-N) dative bond as a Lewis acid-base pair and charge transfer (CT) interactions. These are ternary-component systems consisting of a naphthalenediimide derivative (NDI), tris(pentafluorophenyl)borane (TPFB), and aromatic molecules (guest) with an NDI:TPFB:guest ratio of 1:2:2. The crystal shows guest-dependent color-tunable emissions such as deep blue to orange when a guest molecule of benzene is replaced with other π-conjugated systems. A good correlation between the emission wavelength and ionization potential of the guest and electronic structure calculations indicated that the emission is due to the CT transition from the guest to the NDI. The present study suggests that a rational solution of multcomponent molecular puzzles would be useful for obtaining novel photofunctional solid-state systems.
通过协同的电子给体-受体相互作用，实现了具有可调发射颜色的简单而普遍的多分子组装体系，例如硼-氮（B-N）配位键作为路易斯酸碱对和电荷转移（CT）相互作用。这些是由萘二酰亚胺衍生物（NDI）、三（五氟苯基）硼烷（TPFB）和具有 NDI:TPFB:guest 比为 1:2:2 的芳族分子（客体）组成的三元组分体系。当苯的客体分子被其他π共轭体系取代时，晶体显示出客体依赖性的可调发射颜色，例如从深蓝色到橙色。发射波长与客体的电离势和电子结构计算之间存在良好的相关性，表明发射是由于客体到 NDI 的 CT 跃迁。本研究表明，合理解决多组分分子难题对于获得新型光功能固态系统将是有用的。
