同音
发光
锌
量子产额
化学
吸收(声学)
激子
荧光
金属
结晶学
光化学
纳米技术
材料科学
光学
光电子学
物理
有机化学
量子力学
作者
Hiroaki Ito,Hayato Sakai,Yoshinori Okayasu,Junpei Yuasa,Tadashi Mori,Taku Hasobe
标识
DOI:10.1002/chem.201804171
摘要
Abstract A homoleptic zinc(II) helicate organized by a pair of achiral dipyrromethene ligands through zinc(II) coordination was synthesized to evaluate the chiroptical properties. This zinc complex showed strong exciton‐coupled chiroptical responses from the helical configuration with a large absorption dissymmetry factor | g abs | (up to 0.20). More importantly, intense polarized luminescence in the far‐red region (700–850 nm) with a fluorescence quantum yield Φ FL of 0.23 was observed for this helicate with a dissymmetry factor | g lum | of 0.022, the largest value among rare‐earth‐ and precious‐metal‐free small molecules. These unprecedentedly large g values were supported by theoretical calculations.
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