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[2018-11-27] Stimuli-responsive Pure Organic Luminescent Supramolecules

Posted：2018-11-21  Visits：

Title: Stimuli-responsive Pure Organic Luminescent Supramolecules

Speaker: Prof. Xiang Ma*, East China University of Science & Technology, Shanghai

Date/Time: 10:30-12:00 AM, Nov. 27, 2018

Location: Room 202, Lujiaxi Building

Abstract: 

Stimuli-responsive functional supramolecular machines and polymers are attracting broad attention.[1] Multicolor photoluminescence, including especially white-light emission, were achieved based on host-guest supramolecular systems and even a single molecule.[2-3] Room temperature phosphorescence induced by cyclodextrin (CD-RTP) and cucurbituril (CB-RTP) is provided with the advantages of good selectivity, long life, large Stokes shifts and consequently application in the area of molecular recognition. Amorphous, efficient, room-temperature phosphorescent metal-free polymers were facilely prepared and their applications as encryption ink explored as well.[4-6] A series of amorphous organic small molecular compounds were developed with efficient RTP emission through conveniently modifying phosphor moieties to β-cyclodextrin (β-CD). The hydrogen bonding between the cyclodextrin derivatives immobilizes the phosphors to suppress the nonradiative relaxation and shields phosphors from quenchers, which enables such molecules to emit efficient RTP emission with decent quantum yields.[7] The construction of these supramolecular shuttles and polymer and their RTP function investigation would be of significant importance for the development of switchable smart materials.[8-9]

[1] Ma, X.; Tian, H. Acc. Chem. Res. 2014, 47: 1971.
[2] Zhang, Q.-W.; Ma, X.; Tian, H. et al. J. Am. Chem. Soc., 2016, 138: 13541.
[3] Li, D.; Hu, W.; Wang, J.; Zhang, Q.; Cao, X.-M.; Ma, X.; Tian, H. Chem. Sci., 2018, 9: 5709.
[4] Chen H.; Yao X.; Ma X.; Tian H. Adv. Opt. Mater., 2016, 4: 1397.
[5] Ma, X.; Xu, C.; Wang, J.; Tian, H. Angew. Chem. Int. Ed., 2018, 57: 10854.
[6] Wang, X.; Xu, Y.; Ma, X. Tian, H. Ind. Eng. Chem. Res., 2018, 57: 2866.
[7] Li, D.; Lu, F.; Ma, X. et al. J. Am. Chem. Soc., 2018, 140: 1916.
[8] Yao, X.; Li, T.; Wang, J.; Ma, X. et al. Adv. Opt. Mater., 2016, 4: 1322.
[9] Li, D., Wang J., Ma X. Adv. Opt. Mater., 2018, 1800273.