倍半硅氧烷笼作为氟化物传感器。

Silsesquioxane cages as fluoride sensors.

作者信息

Chanmungkalakul Supphachok, Ervithayasuporn Vuthichai, Hanprasit Sasikarn, Masik Manlika, Prigyai Nicha, Kiatkamjornwong Suda

机构信息

Department of Chemistry, Center of Excellence for Innovation in Chemistry (PERCH-CIC), and Center of Intelligent Materials and Systems, Nanotec Center of Excellence, Faculty of Science, Mahidol University, Rama VI road, Ratchathewi, Bangkok 10400, Thailand.

出版信息

Chem Commun (Camb). 2017 Nov 7;53(89):12108-12111. doi: 10.1039/c7cc06647c.

DOI:10.1039/c7cc06647c

PMID:29072723

Abstract

Pyrene functionalized silsesquioxane cages (PySQ) not only provide significant fluorescence from pyrene-pyrene excimers with a very large Stokes shift (Δλ = 143 nm, 69 930 cm) in DMSO but also exhibit fluoride capture results coincidentally with a π-π* fluorescence enhancement. On the other hand, PySQ-F in THF significantly exhibits π-π* 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 NMR is used to confirm encapsulation of F with Δδ = 19 ppm.

摘要

芘官能化倍半硅氧烷笼（PySQ）不仅在二甲基亚砜（DMSO）中能产生具有很大斯托克斯位移（Δλ = 143 nm，69930 cm）的芘-芘激基缔合物发出的显著荧光，而且在捕获氟化物时恰好伴随着π-π荧光增强。另一方面，在四氢呋喃（THF）中的PySQ-F显著表现出π-π荧光猝灭，并且通过在芘基环之间形成电荷转移（CT）络合物，肉眼可观察到颜色从浅黄色变为深橙色。此外，PySQ能选择性地捕获氟，响应时间小于2分钟，检测限极低（1.61 ppb），同时利用氟核磁共振（F NMR）来确认氟的包封，化学位移变化（Δδ）为19 ppm。