Cu²⁺-Selective Ratiometric and “Off-On” Sensor Based on the Rhodamine Derivative Bearing Pyrene Group

Abstract

A new rhodamine-based derivative bearing a pyrene group (PRC) was synthesized as a ratiometric and "off-on" chemosensor for Cu(2+). PRC displayed a selective and chelation enhanced ratiometric fluorescence change and colorimetric change with Cu(2+) among the metal ions examined.

A new Rhodamine B derivative RBMAB as a highly selective and sensitive chemosensor for Fe3+ with low detection limit

“…When the pH was adjusted to between 1.0 and 5.0, the fluorescence intensity at 582 nm was apparently enhanced due to the ring-opening process of the spirocyclic moiety of Rhodamine B (Scheme 2). 19,20 These results showed that RBMAB was insensitive to pH from 5.0 to 10.0 and may work under approximately physiological conditions with very low background fluorescence. Therefore, further UV-vis and fluorescence studies were carried out in a EtOH/H 2 O (3:2 v/v, PBS buffer, 1.2 mmol L -1 , pH 7.2) solution.…”

“…15 Many of rhodamine derivatives have been designed and synthesized to display specific detection of Pb 2+ , Cu 2+ , Cd 2+ , Cr 3+ , Hg 2+ . [16][17][18][19][20][21][22][23][24][25][26][27] Although rhodamine based sensors for Fe 3+ have been reported a lot. Quite a lot of them haven't present the detection limit or have comparative high detection limit which hindered for low concentration detection.…”

“Off-On” based fluorescent chemosensor for Cu2+ in aqueous media and living cells

“…M.p. : 258.6-259.1 • C. 1 H NMR (ı: ppm, CDCl 3 ): 11.15 (s, 1H, OH), 9.33 (s, 1H, ArH), 8.62-8.64 (d,1H,ArH),1H,ArH),1H,ArH),1H,ArH),1H,ArH),1H,ArH),1H,ArH),1H,ArH) 160.65,158.53,157.76,153.67,152.21,150.53,149.12,133.55,133.07,132.57,131.84,130.14,129.69,128.67,128.47,128.16,126.62,124.26,123.33,122.74,117.44,116.15,112.47,110.66,108.32,108.14,105.41,66.63,44.36,40.19,30.25,20.40,13.86,12.61 10,153.29,151.56,148.95,146.22,133.40,132.94,132.65,131.87,129.69,…”

Novel Bi-Nuclear Boron Complexes with Pyrene Ligand: Synthesis, Photoluminescence, and Electrochemistry Properties

“…6 Moreover, a hydrazone derivative of 2-hydroxy pyrene and a boron derivative were reported to be a Zn 2+ sensor 7 and a new OLED material…”