Cu(II), Co(II), and Mn(II) Complexes of Rhodamine C and Rhodamine 640 Perchlorate: Synthesis, Spectroscopic, Thermal, Fluorescence, and Photostability Studies

Abstract

A goal of our work was to design and synthesize novel Mn(II), Co(II), and Cu(II) complexes with rhodamine C (RHC) and rhodamine 640 perchlorate (RHP) to obtain knowledge about the thermal stability of rhodamine itself compared with its complexes. The complexes prepared have the general formulas, where (M = Mn(II) or Co(II), L = RHC or RHP, n = 2 or 4). The complexes obtained were characterized using elemental analysis, magnetic measurements, molar conductivity, and infrared and electronic spectra as well as thermal measurements. The results suggested that all the RHC and RHP complexes had a 1:2 molar ratio (metal:L). Both RHC and RHP act as a bidentate chelating ligand through the carboxylic groups. The molar conductance measurements proved that the Mn(II), Co(II), and Cu(II) complexes of RHC and RHP are nonelectrolytes. Kinetic thermodynamic parameters such as E*, ΔH*, ΔS*, and ΔG* were calculated from differential thermogravimetric curves. The fluorescence and photostability studies were checked for both fluorescence dyes and their complexes.

A selective fluorescence probe for copper(II) ion in aqueous solution based on a 1,8-naphthalimide Schiff base derivative

“…However, the fluorescent method has attracted much attention due to its implicitness, high selectivity, and low cost [23]. Along this line, several fluorescent molecular probes for Cu 2+ detection have been reported, including rhodamine-based derivatives [24][25][26][27][28][29], BODIPYbased derivatives [30][31][32], coumarin-based derivatives [33][34][35], and naphthalimide-based fluorogenic probes [36][37][38][39]. Nowadays, there is still an intense demand for Cu 2+ fluorescent probes, especially those that can function in actual water samples.…”

In-vitro Evaluation of Anticancer Activity of Rhodamine-640 perchlorate on Rhabdomyosarcoma cell line

“…Different derivatives of Rhodamine123 have served for damaging cancer cells in PDT due to their high absorption coe cient, high uorescence quantum yield, and photostability (Refat, Killa et al 2011). It is worth mentioning that no one before our work has used a high quantum yield of PS Rh-640 perchlorate for RD cell line.…”

A Novel Water Soluble Bipyrazolic Tripod Azoic Dye as Chemosensor for Copper (II) in Aqueous Solution

“…Actually, various fluorescent and colorimetric [19] molecular probes for copper (II) detection have been reported including dansyl chloride fluorophore [20][21][22][23], BODIPYbased probes [24][25][26][27][28][29][30][31][32][33], Rhodamine based derivatives [34][35][36][37][38] and azomethine dye [39]. Also, different electrochemical sensors were developed for detecting copper (II) and other metallic cations [40][41][42][43].…”