Dunne Aishling, Delaney Colm, McKeon Aoife, Nesterenko Pavel, Paull Brett, Benito-Lopez Fernando, Diamond Dermot, Florea Larisa
Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland.
Australian Centre for Research on Separation Science, and ARC Centre of Excellence for Electromaterials Science, Hobart, Tasmania 7001, Australia.
Sensors (Basel). 2018 Apr 4;18(4):1083. doi: 10.3390/s18041083.
Micro-capillaries, capable of light-regulated binding and qualitative detection of divalent metal ions in continuous flow, have been realised through functionalisation with spiropyran photochromic brush-type coatings. Upon irradiation with UV light, the coating switches from the passive non-binding spiropyran form to the active merocyanine form, which binds different divalent metal ions (Zn, Co, Cu, Ni, Cd), as they pass through the micro-capillary. Furthermore, the merocyanine visible absorbance spectrum changes upon metal ion binding, enabling the ion uptake to be detected optically. Irradiation with white light causes reversion of the merocyanine to the passive spiropyran form, with simultaneous release of the bound metal ion from the micro-capillary coating.
通过用螺吡喃光致变色刷型涂层进行功能化，实现了能够在连续流动中对二价金属离子进行光调节结合和定性检测的微毛细管。在用紫外光照射时，涂层从被动的非结合螺吡喃形式转变为活性部花青形式，当不同的二价金属离子（锌、钴、铜、镍、镉）通过微毛细管时，该活性形式会结合这些离子。此外，部花青的可见吸收光谱在金属离子结合时会发生变化，从而能够通过光学方法检测离子摄取情况。用白光照射会使部花青转变回被动的螺吡喃形式，同时使结合的金属离子从微毛细管涂层中释放出来。
