title: A selectively rhodamine-based colorimetric probe for detecting copper(II) ion.
abstract: A novel rhodamine derivative 3-bromo-5-methylsalicylaldehyde rhodamine B hydrazone (BMSRH) has been synthesized by reacting rhodamine B hydrazide with 3-bromo-5-methylsalicylaldehyde and developed as a new colorimetric probe for the selective and sensitive detection of Cu2+. Addition of Cu2+ to the solution of BMSRH results in a rapid color change from colorless to red together with an obvious new band appeared at 552 nm in the UV-vis absorption spectra. This change is attributed to the spirocycle form of BMSRH opened via coordination with Cu2+ in a 1:1 stoichiometry and their association constant is determined as 3.2×10(4) L mol(-1). Experimental results indicate that the BMSRH can provide a rapid, selective and sensitive response to Cu2+ with a linear dynamic range 0.667-240 μmol/L. Common interferent ions do not show any interference on the Cu2+ determination. It is anticipated that BMSRH can be a good candidate probe and has potential application for Cu2+ determination. The proposed probe exhibits the following advantages: a quick, simple and facile synthesis.
authors.affiliation: College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China; School of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, PR China.
authors.forename: Jiangang
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China; School of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Yanli
authors.initials: Y
authors.lastname: Wei
authors.affiliation: College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Jianbing
authors.initials: J
authors.lastname: Chao
authors.affiliation: College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Shaomin
authors.initials: S
authors.lastname: Shuang
authors.affiliation: College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Zongwei
authors.initials: Z
authors.lastname: Cai
authors.affiliation: College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China. Electronic address: dc@sxu.edu.cn.
authors.forename: Chuan
authors.initials: C
authors.lastname: Dong
mesh_terms: D002138:Calibration; D066241:Carbon-13 Magnetic Resonance Spectroscopy; D003124:Colorimetry / Q000379:methods*; D003300:Copper / Q000032:analysis*; D006834:Hydrazines / Q000737:chemistry; D006835:Hydrazones / Q000138:chemical synthesis / Q000737:chemistry; D007477:Ions; D015335:Molecular Probes / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors
chemical_list: D006834:Hydrazines; D006835:Hydrazones; D007477:Ions; D015335:Molecular Probes; D012235:Rhodamines; C543681:rhodamine B hydrazide; D003300:Copper
keywords: 3-bromo-5-methylsalicylaldehyde; Colorimetric; Copper; Hydrazine; Probe; Rhodamine