Details

Autor(en) / Beteiligte

• Feng, Guoliang
• Wang, Zengyao
• Yu, Xudong
• Lan, Haichuang
• Ren, Jujie
• Geng, Lijun
• Yi, Tao

Titel

An ultrasound triggered gelation approach to selectively solvatochromic sensors

Ist Teil von

• Sensors and actuators. B, Chemical, 2017-05, Vol.243, p.1020-1026

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• •T1 and T2 solution or suspension can transform to gels when triggered by ultrasound.•The aggregate system can be developed for selective discrimination of DMSO.•The gel array was used to identify water content in DMSO through optical changes.•The study demonstrated a novel approach for developing solvatochromic sensors. Development of solvatochromic sensor that is responsive to solvents with high selectivity is still a challenging work. Here, we present the first example that an organic molecular aggregate system can be developed as a visual and reversible sensor for selective discrimination of dimethyl sulphoxide (DMSO) from common organic solvents, through ultrasound triggered chromic effect. In this work, two novel compounds T1 and T2 are designed and characterized by combining terpyridyl group as an electron donor and naphthalimide segment as an electron acceptor with amide bond of different alkyl chains. These compounds can gel in a series of organic solvents just at room temperature when subjected to ultrasound. However, transparent red sonogels are only observed in DMSO even though their DMSO solutions are yellow, whereas in other organic solvents, gels have yellow color. Therefore, the ultrasound triggered aggregate system can be developed for selective discrimination of DMSO from common organic solvents by gel array. Moreover, a red-to-yellow colorimetric transition takes place when increasing amount of water is added to the gel, endowing the water detection capability of gel in DMSO. A visual sensor array of these gels is thus created to allow identification of water content in DMSO from 0.5 to 10% by naked eye and fluorescent emission changes.