A novel dual-channel chemosensor for CN⁻ based on rhodamine B hydrazide derivatives and its application in bitter almond

Abstract

We successfully designed and synthesized a novel chemosensor PW bearing rhodamine B hydrazide and 8-formyl-7-hydroxyl-4-methylcoumarin, which displayed both colorimetric and “turn-on” fluorescence responses for CN− in DMSO/H2O (1 : 1, v/v, pH = 7.20) solution.

Highly efficient detection of Cu2+and B4O72−based on a recyclable asymmetric salamo‐based probe in aqueous medium

“…Usually it can be used as a small molecule catalyst, and this makes copper complexes widely used in industrial production. [ 11 ] However, in industrial production and the human environment, [ 12–14 ] an excess of copper ions will lead to environmental pollution and abnormal body functions; therefore the rapid and accurate detection of copper ions has become very important. [ 15 ]…”

A Novel ‘On‐Off’ Rhodamine Based Sensor for Colorimetric Detection of CN−and Its Application as Encoder‐Decoder and Molecular Keypad Lock

“…[31][32][33][34] The reports on the formation of rhodamines pirolactam ring open structure and its application as an anion sensor is rare. [35] Amongst all the anions, considerable attention has been given to the fabrication and synthesis of CN À sensors which are not only easy to handle but also sensitive and selective for their sensing ability owing to high toxicity to living beings and extensive use in different industries such as in gold mining, metallurgy, production of nylon, and other resins and synthetic fibers. Of all the CN À sensors which have been reported till now, the colorimetric sensors possess special advantages for detection with naked eye.…”

“…The general mechanism is followed for sensing of ions by rhodamine based sensor which includes the ring opening of sensor on chelating withmetal ion and these metal‐chelate can be used for sensing of anions [31–34] . The reports on the formation of rhodamines pirolactam ring open structure and its application as an anion sensor is rare [35] …”

Determination of Cyanide in Water and Food Samples Using an Efficient Naphthalene-Based Ratiometric Fluorescent Probe

“…Additionally, cyanide fluorescent probes have been developed on the basis of the specific nucleophilic reactivity of cyanide to electrophilic double bonds, such as CC, CO, CN, CS, or CN + . Nevertheless, most of the reported fluorescent probes for determining cyanide in water samples and food samples only displayed fluorescence turn-on response. − A major limitation of the fluorescence turn-on probe is that the signal output is vulnerable to factors such as excitation intensity, probe concentration, and instrumental efficiency. By contrast, a ratiometric fluorescent probe can effectively eliminate the above-mentioned limitations and consequently provide more accurate analysis. , In addition, the preparation of the reported probes generally needs sophisticated synthesis procedures.…”