Structural and Theoretical Insights into the AIE Attributes of Phosphindole Oxide: The Balance Between Rigidity and Flexibility

	Structural and Theoretical Insights into the AIE Attributes of Phosphindole Oxide: The Balance Between Rigidity and Flexibility
	Bu, Fan 1; Wang, Erjing 2; Peng, Qian 3; Hu, Rongrong 1; Qin, Anjun 1; Zhao, Zujin 1; Tang, Ben Zhong 1,2
刊名	CHEMISTRY-A EUROPEAN JOURNAL
	2015-03-09
卷号	21 期号:11 页码:4440-4449
关键词	aggregation intramolecular motion phosphindole oxides photoluminescence theoretical calculation
英文摘要	Multiple intramolecular motions consume the excited-state energy of luminogenic molecules upon photoexcitation and lower the emission efficiency. The low frequency rotational motion of aromatic rings can be facilely restricted by steric constraint in the condensed phase, but the high frequency bond stretching motion can hardly be suppressed by aggregation. In this work, three phosphorus-containing heterocycles, 1,2,3,4,5-pentaphenylphosphole-1-oxide (PPPO), 1,2,3-triphenylphosphindole-1-oxide (TPPIO), and 1,2,3-triphenylphosphindole (TPPI), were synthesized and characterized. Their optical properties, crystal-packing manners, electronic features, and fluorescence dynamics were systematically investigated, and theoretical calculations were performed to decipher structure-property relationships. The results reveal that these luminogens are weak emitters in solutions but show strong emission in aggregates, exhibiting obvious aggregation-induced emission (AIE) features. The aggregation-insensitive stretching motion, which is dominant in PPPO, is lowered in TPPIO, enabling TPPIO to fluoresce much more efficiently than PPPO in aggregates. The stretching motion is even more lowered in TPPI, but its relatively planar conformation suffers emission quenching due to strong p-p stacking interactions in aggregates. Therefore, a twisted molecular conformation consisting of a rigid stator and a rotatable periphery is demonstrated to be a rational design for more efficient AIE luminogens.
收录类别	SCI
语种	英语
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/28262]
专题	化学研究所_有机固体实验室
作者单位	1.SCUT, Guangdong Innovat Res Team, SCUT HKUST Joint Res Lab, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China 2.HKUST, Div Biomed Engn, Div Life Sci, Dept Chem, Kowloon, Hong Kong, Peoples R China 3.Chinese Acad Sci, BNLMS, Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Bu, Fan,Wang, Erjing,Peng, Qian,et al. Structural and Theoretical Insights into the AIE Attributes of Phosphindole Oxide: The Balance Between Rigidity and Flexibility[J]. CHEMISTRY-A EUROPEAN JOURNAL,2015,21(11):4440-4449.
APA	Bu, Fan.,Wang, Erjing.,Peng, Qian.,Hu, Rongrong.,Qin, Anjun.,...&Tang, Ben Zhong.(2015).Structural and Theoretical Insights into the AIE Attributes of Phosphindole Oxide: The Balance Between Rigidity and Flexibility.CHEMISTRY-A EUROPEAN JOURNAL,21(11),4440-4449.
MLA	Bu, Fan,et al."Structural and Theoretical Insights into the AIE Attributes of Phosphindole Oxide: The Balance Between Rigidity and Flexibility".CHEMISTRY-A EUROPEAN JOURNAL 21.11(2015):4440-4449.