Silsesquioxane cages as fluoride sensors

被引：68

作者：

Chanmungkalakul, Supphachok ^{[1
,2
]}

Ervithayasuporn, Vuthichai ^{[1
,2
]}

Hanprasit, Sasikarn ^{[1
,2
]}

Masik, Manlika ^{[1
,2
]}

Prigyai, Nicha ^{[1
,2
]}

Kiatkamjornwong, Suda ^{[3
,4
]}

机构：

[1] Mahidol Univ, Dept Chem, Ctr Excellence Innovat Chem PERCH CIC, Fac Sci, Rama 6 Rd, Bangkok 10400, Thailand

[2] Mahidol Univ, Ctr Intelligent Mat & Syst, Nanotec Ctr Excellence, Fac Sci, Rama 6 Rd, Bangkok 10400, Thailand

[3] Chulalongkorn Univ, Fac Sci, Phayathai Rd, Bangkok 10330, Thailand

[4] Royal Soc Thailand, Div Sci, Bangkok 10300, Thailand

来源：

CHEMICAL COMMUNICATIONS | 2017年 / 53卷 / 89期

关键词：

ION DETECTION; CATALYST; REARRANGEMENT; ENCAPSULATION; FLUORESCENCE; ANIONS; POSS; T-12; T-8;

D O I：

10.1039/c7cc06647c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pyrene functionalized silsesquioxane cages (PySQ) not only provide significant fluorescence from pyrene-pyrene excimers with a very large Stokes shift (Delta lambda = 143 nm, 69 930 cm(-1)) in DMSO but also exhibit fluoride capture results coincidentally with a pi-pi* fluorescence enhancement. On the other hand, PySQ-F- in THF significantly exhibits pi-pi* fluorescence quenching and a color change can be observed with the naked eye from light yellow to deep orange by forming a charge-transfer (CT) complex among the pyrenyl rings. Moreover, PySQ selectively captures F- with a response time of <2 min and with a very low detection limit (1.61 ppb), while F-19 NMR is used to confirm encapsulation of F- with Delta delta = 19 ppm.

引用

收藏

页码：12108 / 12111

页数：4

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