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

Abstract

An asymmetric salamo‐based probe molecule (H2L) was synthesized and characterized structurally. When DMF/H2O (9:1) was used as the solvent, it was shown probe H2L has high sensitivity to Cu2+. Using high‐resolution mass spectrometry and theoretical calculation, it was found that probe H2L could form a more stable complex (1:1) with Cu2+, the minimum limit of detection (LOD) of H2L for Cu2+ was calculated as 9.95 × 10−8 M. In addition, probe H2L could also be used to identify B4O72− under the same detection conditions and the minimum LOD of H2L for B4O72− was calculated as 4.98 × 10−7 M. At the same time, density functional theory theoretical calculation further proved the flexibility of probe H2L. Through the action of EDTA, probe H2L had a cyclic ability to recognize Cu2+, and showed a better response in the physiological pH range; probe H2L had the characteristics of fast recognition speed and high efficiency. In addition, with probe H2L test paper for Cu2+ and B4O72−, the effect was more obvious. Meanwhile, probe H2L can be used to quantitatively detect Cu2+ in water samples.

Construction of novel hexanuclear Co(II) and dinuclear Ni(II) bis(salamo)‐type complexes

“…The IR spectra of complexes 1 and 2 exhibit ν(Co N) and ν(Ni N) (or ν(Co O) and ν(Ni O)) vibrational absorption frequencies at about 470 and 459 (or 425 and 431) cm À1 , respectively. [21] These bands are found as new peaks for complexes 1 and 2 and are not present in the spectrum of the free ligand H 4 L.…”

“…[15][16][17][18][19][20] High-nuclear metal nanoclusters have attracted much attention due to their beautiful geometric configuration, special physicochemical properties, and luminescent materials. [20][21][22][23][24][25] Although flexible ligands with S, N, or O atom donors have been used to design d-zone transition metal frameworks, there are relatively few studies involving rigid ligands in the construction of high-nuclear clusters. [26][27][28][29][30][31] A key feature in this kind of structures is the presence of intramolecular π-π stacking interactions between ligands, which can further add to the stability of the complex.…”

Exploring two helical centrosymmetric homotetranuclear Cu (II) bis (salamo)‐based complexes

“…In recent 10 years, by designing salamo-based compounds containing different potential coordination sites, the structurally different complexes of transition metal (II/III) ions [21][22][23] and 3d-4f metal (II/III) ions [24][25][26] could be obtained. The obtained metal (II/III) complexes are further studied in detail and founded have potential applications in the fields of ion recognition, [27][28][29][30][31] magnetic behavior, 32 catalysis, [33,34] and antimicrobial activity, 35 the theoretically supported by Hirshfeld surfaces analyses [36][37][38] and DFT calculations. 39 There are many applications about the different complexes in the world.…”

An investigation of structure, Hirshfeld surface, and fluorescence properties of two dinuclear Ni (II) and Zn (II) salamo‐type complexes

“…Recent years, a new type of salen-based analogue, salomo-based ligands (R-CH=N-O-[CH 2 ] n -O-N=CH-R) were developed. [22][23][24][25][26][27][28][29][30] Due to the electronegativity of the oxygen atoms, which can significantly affect the reversible reaction of the imine bond, salomo-based compounds with specific functions [31][32][33][34][35][36][37] and novel structures were synthesized. [38][39][40][41][42][43][44][45] With the continuous deepening and expansion of their research, a lot of 3d, [46][47][48][49][50] 3d-s, [51] 3d-4f [52][53][54][55] complexes have been synthesized by coordination-driven self-assembling, at the same time, the fast and efficient chemical probes have also been developed.…”