Fabrication of a light-responsive polymer nanocomposite containing spiropyran as a sensor for reversible recognition of metal ions

Abstract

Recognition of metal ions using different methods such as HPLC, ICP-MS, ICP-AES, etc. has many limitations including expensiveness, time-consuming, and the need for advanced equipment. These limitations were extensively solved...

Photoresponsive reversible self-assembly of rod-coil amphiphiles containing spiropyran groups

“…This peak was blue-shifted in relation to the isolated MC absorption signal generated by the UV response. 68,69 In addition, a weak MC-form absorption peak and a relatively strong absorption peak from MC-Cu 2+ were observed simultaneously upon UV irradiation, indicating the presence of trace amounts of MC in the system. To further investigate the binding capacity of 3 with various metal ions, we conducted UV spectroscopy on a mixed solution of 3.…”

Thermal-Induced Chromism and Fluorescence Emission of Rhodamine B-Containing Polymers with Different Polarities: Tracking Temperature and Development of Thermochromic Labels

“…In organic thermochromic materials, leuco dyes are highly interested and changed from a colorless to a colored state by accepting a proton. Rhodamine B derivatives, , fluorans, − spiropyrans, − and crystal violet lactone are some important examples of leuco dye compounds that are generally used in the preparation of thermochromic materials. , Thermochromism is classified into reversible and irreversible categories, where the reversible systems have gained more attention because of their extensive applications based on temperature fluctuations during the day and in different seasons, such as in the military, construction, anticounterfeiting, sensors, etc . For the reversible coloration–decoloration of organic leuco dyes, a three-component system including leuco dye, solvent, and developer is required. , Color developers play the role of chroma, and are often from the category of phenolics (a weak acid such as Bisphenol A), aromatic amines, lauryl gallate, ethyl gallate, carboxylic acids, and Lewis acids that are usually used for the solid state of the thermochromic materials. ,− Strong proton donors, such as hydrochloric acid, are suitable for both liquid and solid states, and they provide a proton to the color former.…”

Light and pH dual-responsive spiropyran-based cellulose nanocrystals

“…9–12 Spiropyran-based materials have been extensively investigated and widely applied in many fields, such as bioimaging, controlled release, data storage, and sensors. 13–16…”

“…[9][10][11][12] Spiropyran-based materials have been extensively investigated and widely applied in many elds, such as bioimaging, controlled release, data storage, and sensors. [13][14][15][16] There has been great interest in developing stimulusresponsive nanoparticles ascribing to their advantages such as, good water dispersibility, excellent biocompatibility and the ability for further functionalization. 17 Spiropyran has been used to functionalize various nanomaterials, such as gold or silver nanoparticles, semiconductor quantum dots, and carbon-based nanomaterials, to gain multifunctional materials to widen their eld of applications.…”