Highly selective Cu²⁺ detection with a naphthalimide-functionalised pillar[5]arene fluorescent chemosensor

Abstract

Ligand 1, a rim-differentiated pillar[5]arene with five naphthalimide groups, serves as a highly selective ratiometric fluorescent chemosensor for Cu2+.

Recent Developments of Fluorescence Sensors Constructed from Pillar[n]arene-Based Supramolecular Architectures Containing Metal Coordination Sites

“…Pillar[5]arene was modified by Chang R. and Chang K.C. with five neighboring naphthalimide groups to form a new ligand, P6 , for metal ion coordination, effectively serving as a ratiometric fluorescence sensor for Cu 2+ ions in a CH 2 Cl 2 /CH 3 CN = 1/1 system [ 48 ]. This sensitivity was also observed in 10% aqueous methanol solutions.…”

Flow-Through Amperometric Biosensor System Based on Functionalized Aryl Derivative of Phenothiazine and PAMAM-Calix-Dendrimers for the Determination of Uric Acid

“…They have a rigid architecture and hydrophobic electron-donating cavity that can bind various analyte molecules according to the “guest-host” principle. This allows for their use in various nanocomposites [ 8 , 9 ], in molecular recognition [ 10 , 11 ], chemosensor assembling [ 12 , 13 ], ion transportation [ 14 ], and the assembling of supramolecular polymers [ 15 ]. Literature reports the use of pillar[n]arenes in smart materials [ 16 ], drug release systems [ 17 ], as adsorbents [ 18 ], in chemical catalysis [ 19 ] and, most widely, in chemical sensors, because pillar[5]arenes are electrochemically active and exhibit mediator properties in electrode reactions [ 20 ].…”