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Sensors 2007, 7(12), 3166-3178; doi:10.3390/s7123166
Article

Thermally Stable Merocyanine Form of Photochromic Spiropyran with Aluminum Ion as a Reversible Photo-driven Sensor in Aqueous Solution

 and *
Received: 30 October 2007; Accepted: 3 November 2007 / Published: 6 December 2007
(This article belongs to the Special Issue Supramolecular Sensors)
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Abstract: A reversible photo-driven sensor for aluminum ions based on photochromicspiropyran was reported with rapid response time. The detection of aluminum wasperformed via the chelation of aluminum ions with the merocyanine form (MC) ofphotochromic spiropyran. 1H NMR studies confirmed the conversation from the MC forminto the Al3+ -MC form. Addition of aluminum ions to the spiropyran (SP) in a MeCN/H2Omixture results in obvious color changes with a loss in absorbance at 539 nm and anenhancement in absorbance at about 420 nm after irradiation at 365 nm. The metal chelationcomplex (Al3+ -MC) can also be converted into the original SP form by irradiation withvisible light. Aluminum ions can be detected down to 0.5 μM levels in a fast response ofless than 5 seconds with no interference from other ionic species.
Keywords: photo-driven; photochromic spiropyran; sensor; aluminum ion. photo-driven; photochromic spiropyran; sensor; aluminum ion.
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Ren, J.; Tian, H. Thermally Stable Merocyanine Form of Photochromic Spiropyran with Aluminum Ion as a Reversible Photo-driven Sensor in Aqueous Solution. Sensors 2007, 7, 3166-3178.

AMA Style

Ren J, Tian H. Thermally Stable Merocyanine Form of Photochromic Spiropyran with Aluminum Ion as a Reversible Photo-driven Sensor in Aqueous Solution. Sensors. 2007; 7(12):3166-3178.

Chicago/Turabian Style

Ren, Jiaqiang; Tian, He. 2007. "Thermally Stable Merocyanine Form of Photochromic Spiropyran with Aluminum Ion as a Reversible Photo-driven Sensor in Aqueous Solution." Sensors 7, no. 12: 3166-3178.



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