Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/3770
Title: Engineering Diformyl Diaryldipyrromethane into a Molecular Keypad Lock
Authors: Sreedevi, KCG
Thomas, AP
Adinarayana, B
Srinivasan, A
Keywords: excimer formation
proton-transfer
fluorescence
sensor
recognition
anions
titanium
Issue Date: 2020
Publisher: Royal Society of Chemistry
Citation: New Journal of Chemistry;44(27): 11768-11776.
Abstract: Sensor materials that undergo a change in fluorescence behaviour upon binding with cations and anions are one of the most widely used analytical tools and they can be used for various molecular switches and logic gates. Here, we have designed a photolabile chemosensor for both anions and cations by using a simple acyclic molecule, diformyl diaryldipyrromethane, and integrated it as a molecular keypad lock system. The molecular keypad lock works with respect to three inputs, with UV irradiation as input 1, where diformyl diaryldipyrromethane undergoes a photoenolization process to generate the dienol with intense green fluorescence. Further, the addition of anions such as F(-)or CN-(input 2) promotes deprotonation to yield the corresponding mono and dianions followed by emission changes from green to red and yellow, respectively. The generated dianions can effectively complex with Zn(2+)ions to result in \”turn on\” fluorescence at 444 nm (yellow to blue) and thus Zn(2+)ions are used as input 3. The output signal (lambda(em)= 444 nm) depends not only on the proper combination but also on the correct sequence of input signals,i.e., UV, F-(or CN-) and finally Zn(2+)ions, mimicking a keypad.
URI: https://doi.org/10.1039/d0nj01963a
http://hdl.handle.net/123456789/3770
Appears in Collections:2020



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.